Mergejdk8-b93

206 files changed, 5185 insertions, 5164 deletions

diff --git a/.hgignore b/.hgignore
index 56e01bae..6d68c1d4 100644
--- a/.hgignore
+++ b/.hgignore
@@ -24,3 +24,4 @@ jcov2/*
 .idea/*
 test/lib/testng.jar
 test/script/external/*
+.project
diff --git a/docs/JavaScriptingProgrammersGuide.html b/docs/JavaScriptingProgrammersGuide.html
index 811b29c9..a9803f7f 100644
--- a/docs/JavaScriptingProgrammersGuide.html
+++ b/docs/JavaScriptingProgrammersGuide.html
@@ -71,9 +71,20 @@ Classes</a></span></li>
 Arrays</a></span></li>
 <li><span><a href="#jsimplement">Implementing Java
 Interfaces</a></span></li>
-<li><span><a href="#jsextend">Extending Java classes
+<li><span><a href="#jsextendabstract">Extending Abstract Java Classes
+</a></span></li>
+<li><span><a href="#jsextendconcrete">Extending Concrete Java Classes
+</a></span></li>
+<li><span><a href="#jsimplementmultiple">Implementing Multiple Java Interfaces
+</a></span></li>
+<li><span><a href="#classBoundImplementations">Class-Bound Implementations
 </a></span></li>
 <li><span><a href="#jsoverload">Overload Resolution</a></span></li>
+<li><span><a href="#dataTypeMapping">Mapping of Data Types Between Java
+and JavaScript</a></span></li>
+
+
+
 </ul>
 </li>
 <li><span><a href="#engineimpl">Implementing Your Own Script
@@ -466,10 +477,10 @@ language rather than JavaScript.</p>
 </code>
 </pre> 
 
-Note that the name of the type is always a string for a fully qualified name. You can use any of these types to create new instances, e.g.:
+Note that the name of the type is always a string for a fully qualified name. You can use any of these expressions to create new instances, e.g.:
 
 <pre><code>
- var anArrayList = new Java.type("java.util.ArrayList")
+ var anArrayList = new (Java.type("java.util.ArrayList"))
 </code></pre> 
 
 or
@@ -496,6 +507,37 @@ However, once you retrieved the outer class, you can access the inner class as a
 <p>
 You can access both static and non-static inner classes. If you want to create an instance of a non-static inner class, remember to pass an instance of its outer class as the first argument to the constructor.
 </p>
+<p>
+In addition to creating new instances, the type objects returned from <code>Java.type</code> calls can also be used to access the
+static fields and methods of the classes:
+<pre><code>
+ var File = Java.type("java.io.File")
+ File.createTempFile("nashorn", ".tmp")
+</code></pre> 
+<p>
+Methods with names of the form <code>isXxx()</code>, <code>getXxx()</code>, and <code>setXxx()</code> can also be used as properties, for both instances and statics.
+</p>
+<p>
+A type object returned from <code>Java.type</code> is distinct from a <code>java.lang.Class</code> object. You can obtain one from the other using properties <code>class</code> and <code>static</code> on them.
+<pre><code>
+ var ArrayList = Java.type("java.util.ArrayList")
+ var a = new ArrayList
+
+ // All of the following print true:
+ print("Type acts as target of instanceof: " + (a instanceof ArrayList))
+ print("Class doesn't act as target of instanceof: " + !(a instanceof a.getClass()))
+ print("Type is not same as instance's getClass(): " + (a.getClass() !== ArrayList))
+ print("Type's `class` property is same as instance getClass(): " + (a.getClass() === ArrayList.class))
+ print("Type is same as instance getClass()'s `static` property: " + (a.getClass().static === ArrayList))
+</code></pre> 
+<p>
+You can think of the type object as similar to the class names as used in Java source code: you use them as the
+arguments to the <code>new</code> and <code>instanceof</code> operators and as the namespace for the static fields
+and methods, but they are different than the runtime <code>Class</code> objects returned by <code>getClass()</code> calls.
+Syntactically and semantically, this separation produces code that is most similar to Java code, where a distinction
+between compile-time class expressions and runtime class objects also exists. (Also, Java can't have the equivalent of <code>static</code>
+property on a <code>Class</code> object since compile-time class expressions are never reified as objects).
+</p>
 <hr>
 <a name="jsimport" id="jsimport"></a>
 <h3>Importing Java Packages, Classes</h3>
@@ -558,10 +600,7 @@ with (SwingGui) {
 <a name="jsarrays" id="jsarrays"></a>
 <h3>Creating, Converting and Using Java Arrays</h3>
 <p>
-Array element access or length access is
-the same as in Java. Also, a script array can be used when a Java
-method expects a Java array (auto conversion). So in most cases we
-don't have to create Java arrays explicitly.</p>
+Array element access or length access is the same as in Java.</p>
 <pre><code>
 // <a href="source/javaarray.js">javaarray.js</a>
 
@@ -577,27 +616,31 @@ print(a[0]);
 </pre>
 <p>
 It is also possible to convert between JavaScript and Java arrays.
-Given a JavaScript array and a Java type, <code>Java.toJavaArray</code> returns a Java array with the same initial contents, and with the specified component type. 
+Given a JavaScript array and a Java type, <code>Java.to</code> returns a Java array with the same initial contents, and with the specified array type. 
 </p>
 <pre><code>
  var anArray = [1, "13", false]
- var javaIntArray = Java.toJavaArray(anArray, "int")
+ var javaIntArray = Java.to(anArray, "int[]")
  print(javaIntArray[0]) // prints 1
  print(javaIntArray[1]) // prints 13, as string "13" was converted to number 13 as per ECMAScript ToNumber conversion
  print(javaIntArray[2]) // prints 0, as boolean false was converted to number 0 as per ECMAScript ToNumber conversion
 </code></pre>
 <p>
-Given a Java array or Collection, <code>Java.toJavaScriptArray</code> returns a JavaScript array with a shallow copy of its contents. Note that in most cases, you can use Java arrays and lists natively in Nashorn; in cases where for some reason you need to have an actual JavaScript native array (e.g. to work with the array comprehensions functions), you will want to use this method.i
+You can use either a string or a type object returned from <code>Java.type()</code> to specify the type of the array. 
+You can also omit the array type, in which case a <code>Object[]</code> will be created.
+</p>
+<p>
+Given a Java array or Collection, <code>Java.from</code> returns a JavaScript array with a shallow copy of its contents. Note that in most cases, you can use Java arrays and lists natively in Nashorn; in cases where for some reason you need to have an actual JavaScript native array (e.g. to work with the array comprehensions functions), you will want to use this method.
 </p>
 <pre><code>
 var File = Java.type("java.io.File");
 var listCurDir = new File(".").listFiles();
-var jsList = Java.toJavaScriptArray(listCurDir);
+var jsList = Java.from(listCurDir);
 print(jsList);
 </code></pre>
 <hr>
 <a name="jsimplement" id="jsimplement"></a>
-<h3>Implementing Java Interfaces</h3>
+<h3>Implementing Java interfaces</h3>
 <p>A Java interface can be implemented in JavaScript by using a
 Java anonymous class-like syntax:</p>
 <pre><code>
@@ -631,8 +674,8 @@ th.join();
 </code>
 </pre>
 <hr>
-<a name="jsextend" id="jsextend"></a>
-<h3>Extending Java classes</h3>
+<a name="jsextendabstract" id="jsextendabstract"></a>
+<h3>Extending Abstract Java Classes</h3>
 <p>
 If a Java class is abstract, you can instantiate an anonymous subclass of it using an argument list that is applicable to any of its public or protected constructors, but inserting a JavaScript object with functions properties that provide JavaScript implementations of the abstract methods. If method names are overloaded, the JavaScript function will provide implementation for all overloads. E.g.:
 </p>
@@ -671,6 +714,9 @@ The use of functions can be taken even further; if you are invoking a Java metho
 
 Here, <code>Timer.schedule()</code> expects a <code>TimerTask</code> as its argument, so Nashorn creates an instance of a TimerTask subclass and uses the passed function to implement its only abstract method, run(). In this usage though, you can't use non-default constructors; the type must be either an interface, or must have a protected or public no-arg constructor.
 
+<hr>
+<a name="jsextendconcrete" id="jsextendconcrete"></a>
+<h3>Extending Concrete Java Classes</h3>
 <p>
 To extend a concrete Java class, you have to use <code>Java.extend</code> function.
 <code>Java.extend</code> returns a type object for a subclass of the specified Java class (or implementation of the specified interface) that acts as a script-to-Java adapter for it.  
@@ -695,26 +741,178 @@ var printAddInvokedArrayList = new ArrayListExtender() {
 printSizeInvokedArrayList.size();
 printAddInvokedArrayList.add(33, 33);
 </code></pre>
+<p>
+The reason you must use <code>Java.extend()</code> with concrete classes is that with concrete classes, there can be a 
+syntactic ambiguity if you just invoke their constructor. Consider this example:
+</p>
+<pre><code>
+var t = new java.lang.Thread({ run: function() { print("Hello!") } })
+</code></pre>
+<p>
+If we allowed subclassing of concrete classes with constructor syntax, Nashorn couldn't tell if you're creating a new 
+<code>Thread</code> and passing it a <code>Runnable</code> at this point, or you are subclassing <code>Thread</code> and
+passing it a new implementation for its own <code>run()</code> method.
+</p>
+<hr>
+<a name="jsimplementmultiple" id="jsimplementmultiple"></a>
+<h3>Implementing Multiple Interfaces</h3>
+<p>
+<code>Java.extend</code> can in fact take a list of multiple types. At most one of the types can be a class, and the rest must
+be interfaces (the class doesn't have to be the first in the list). You will get back an object that extends the class and 
+implements all the interfaces. (Obviously, if you only specify interfaces and no class, the object will extend <code>java.lang.Object</code>).
+<hr>
+<a name="classBoundImplementations" id="classBoundImplementations"></a>
+<h3>Class-Bound Implementations</h3>
+<p>
+The methods shown so far for extending Java classes and implementing interfaces &ndash; passing an implementation JavaScript object 
+or function to a constructor, or using <code>Java.extend</code> with <code>new</code> &ndash; all produce classes that take an
+extra JavaScript object parameter in their constructors that specifies the implementation. The implementation is therefore always bound
+to the actual instance being created with <code>new</code>, and not to the whole class. This has some advantages, for example in the
+memory footprint of the runtime, as Nashorn can just create a single "universal adapter" for every combination of types being implemented.
+In reality, the below code shows that different instantiations of, say, <code>Runnable</code> have the same class regardless of them having
+different JavaScript implementation objects:
+</p>
+<pre><code>
+var Runnable = java.lang.Runnable;
+var r1 = new Runnable(function() { print("I'm runnable 1!") })
+var r2 = new Runnable(function() { print("I'm runnable 2!") })
+r1.run()
+r2.run()
+print("We share the same class: " + (r1.class === r2.class))
+</code></pre>
+<p>
+prints:
+</p>
+<pre><code>
+I'm runnable 1!
+I'm runnable 2!
+We share the same class: true
+</code></pre>
+<p>
+Sometimes, however, you'll want to extend a Java class or implement an interface with implementation bound to the class, not to
+its instances. Such a need arises, for example, when you need to pass the class for instantiation to an external API; prime example
+of this is the JavaFX framework where you need to pass an Application class to the FX API and let it instantiate it.
+</p>
+<p>
+Fortunately, there's a solution for that: <code>Java.extend()</code> &ndash; aside from being able to take any number of type parameters
+denoting a class to extend and interfaces to implement &ndash; can also take one last argument that has to be a JavaScript object
+that serves as the implementation for the methods. In this case, <code>Java.extend()</code> will create a class that has the same
+constructors as the original class had, as they don't need to take an an extra implementation object parameter. The example below
+shows how you can create class-bound implementations, and shows that in this case, the implementation classes for different invocations
+are indeed different:
+</p>
+<pre><code>
+var RunnableImpl1 = Java.extend(java.lang.Runnable, function() { print("I'm runnable 1!") })
+var RunnableImpl2 = Java.extend(java.lang.Runnable, function() { print("I'm runnable 2!") })
+var r1 = new RunnableImpl1()
+var r2 = new RunnableImpl2()
+r1.run()
+r2.run()
+print("We share the same class: " + (r1.class === r2.class))
+</code></pre>
+<p>
+prints:
+</p>
+<pre><code>
+I'm runnable 1!
+I'm runnable 2!
+We share the same class: false
+</code></pre>
+<p>
+As you can see, the major difference here is that we moved the implementation object into the invocation of <code>Java.extend</code>
+from the constructor invocations &ndash; indeed the constructor invocations now don't even need to take an extra parameter! Since
+the implementations are bound to a class, the two classes obviously can't be the same, and we indeed see that the two runnables no
+longer share the same class &ndash; every invocation of <code>Java.extend()</code> with a class-specific implementation object triggers
+the creation of a new Java adapter class.
+</p>
+<p>
+Finally, the adapter classes with class-bound implementations can <i>still</i> take an additional constructor parameter to further
+override the behavior on a per-instance basis. Thus, you can even combine the two approaches: you can provide part of the implementation
+in a class-based JavaScript implementation object passed to <code>Java.extend</code>, and part in another object passed to the constructor.
+Whatever functions are provided by the constructor-passed object will override the functions in the class-bound object.
+</p>
+<pre><code>
+var RunnableImpl = Java.extend(java.lang.Runnable, function() { print("I'm runnable 1!") })
+var r1 = new RunnableImpl()
+var r2 = new RunnableImpl(function() { print("I'm runnable 2!") })
+r1.run()
+r2.run()
+print("We share the same class: " + (r1.class === r2.class))
+</code></pre>
+<p>
+prints:
+</p>
+<pre><code>
+I'm runnable 1!
+I'm runnable 2!
+We share the same class: true
+</code></pre>
 <hr>
 <a name="jsoverload" id="jsoverload"></a>
 <h3>Overload Resolution</h3>
 <p>Java methods can be overloaded by argument types. In Java,
 overload resolution occurs at compile time (performed by javac).
-When calling Java methods from a script, the script
-interpreter/compiler needs to select the appropriate method. With
-the JavaScript engine, you do not need to do anything special - the
-correct Java method overload variant is selected based on the
-argument types. But, sometimes you may want (or have) to explicitly
-select a particular overload variant.</p>
+When calling Java methods from Nashorn, the appropriate method will be
+selected based on the argument types at invocation time. You do not need
+to do anything special &ndash; the correct Java method overload variant 
+is selected based automatically. You still have the option of explicitly
+specifying a particular overload variant. Reasons for this include 
+either running into a genuine ambiguity with actual argument types, or 
+rarely reasons of performance &ndash; if you specify the actual overload
+then the engine doesn't have to perform resolution during invocation.
+Individual overloads of a Java methods are exposed as special properties
+with the name of the method followed with its signature in parentheses. 
+You can invoke them like this:</p>
 <pre><code>
 // <a href="source/overload.js">overload.js</a>
 
 var out = java.lang.System.out;
 
 // select a particular print function 
-out["println(java.lang.Object)"]("hello");
+out["println(Object)"]("hello");
 </code>
 </pre>
+<p>
+Note that you normally don't even have to use qualified class names in 
+the signatures as long as the unqualified name of the type is sufficient
+for uniquely identifying the signature. In practice this means that only
+in the extremely unlikely case that two overloads only differ in 
+parameter types that have identical unqualified names but come from 
+different packages would you need to use the fully qualified name of the
+class.
+</p>
+<hr>
+<a name="dataTypeMapping" id="dataTypeMapping"></a>
+<h3>Mapping of Data Types Between Java and JavaScript</h3>
+<p>
+We have previously shown some of the data type mappings between Java and JavaScript.
+We saw that arrays need to be explicitly converted. We have also shown that JavaScript functions
+are automatically converted to SAM types when passed as parameters to Java methods. Most other
+conversions work as you would expect.
+</p>
+<p>
+Every JavaScript object is also a <code>java.util.Map</code> so APIs receiving maps will receive them directly.
+</p>
+<p>
+When numbers are passed to a Java API, they will be converted to the expected target numeric type, either boxed or
+primitive, but if the target type is less specific, say <code>Number</code> or <code>Object</code>, you can only
+count on them being a <code>Number</code>, and have to test specifically for whether it's a boxed <code>Double</code>,
+<code>Integer</code>, <code>Long</code>, etc. &ndash; it can be any of these due to internal optimizations. Also, you 
+can pass any JavaScript value to a Java API expecting either a boxed or primitive number; the JavaScript specification's
+<code>ToNumber</code> conversion algorithm will be applied to the value.
+</p>
+<p>
+In a similar vein, if a Java method expects a <code>String</code> or a <code>Boolean</code>, the values will be
+converted using all conversions allowed by the JavaScript specification's <code>ToString</code> and <code>ToBoolean</code>
+conversions.
+</p>
+<p>
+Finally, a word of caution about strings. Due to internal performance optimizations of string operations, JavaScript strings are
+not always necessarily of type <code>java.lang.String</code>, but they will always be of type <code>java.lang.CharSequence</code>.
+If you pass them to a Java method that expects a <code>java.lang.String</code> parameter, then you will naturally receive a Java
+String, but if the signature of your method is more generic, i.e. it receives a <code>java.lang.Object</code> parameter, you can 
+end up with an object of private engine implementation class that implements <code>CharSequence</code> but is not a Java String.
+</p>
 <hr>
 <a name="engineimpl" id="engineimpl"></a>
 <h2>Implementing Your Own Script Engine</h2>
diff --git a/docs/source/javaarray.js b/docs/source/javaarray.js
index a02aa3ca..d0de9124 100644
--- a/docs/source/javaarray.js
+++ b/docs/source/javaarray.js
@@ -40,7 +40,7 @@ print(a[0]);
 
 // convert a script array to Java array
 var anArray = [1, "13", false];
-var javaIntArray = Java.toJavaArray(anArray, "int");
+var javaIntArray = Java.to(anArray, "int[]");
 print(javaIntArray[0]);// prints 1
 print(javaIntArray[1]); // prints 13, as string "13" was converted to number 13 as per ECMAScript ToNumber conversion
 print(javaIntArray[2]);// prints 0, as boolean false was converted to number 0 as per ECMAScript ToNumber conversion
@@ -48,5 +48,5 @@ print(javaIntArray[2]);// prints 0, as boolean false was converted to number 0 a
 // convert a Java array to a JavaScript array
 var File = Java.type("java.io.File");
 var listCurDir = new File(".").listFiles();
-var jsList = Java.toJavaScriptArray(listCurDir);
+var jsList = Java.from(listCurDir);
 print(jsList);
diff --git a/make/build-benchmark.xml b/make/build-benchmark.xml
index d28de93d..f1ce180a 100644
--- a/make/build-benchmark.xml
+++ b/make/build-benchmark.xml
@@ -24,258 +24,270 @@
 <project name="nashorn-benchmarks" default="all" basedir="..">
 
   <target name="octane-init" depends="jar">
-    <fileset id="octane-set"
-	     dir="${octane-test-sys-prop.test.js.roots}"
-	     excludes="${octane-test-sys-prop.test.js.exclude.list}">
-      <include name="*.js"/>
-    </fileset>
-    <pathconvert pathsep=" " property="octane-tests" refid="octane-set"/>
+    <property name="octane-tests" value="box2d code-load crypto deltablue earley-boyer gbemu navier-stokes pdfjs raytrace regexp richards splay"/>
+  </target>
+  
+  <!-- ignore benchmarks where rhino crashes -->
+  <target name="octane-init-rhino" depends="jar">
+    <property name="octane-tests" value="box2d code-load crypto deltablue earley-boyer gbemu navier-stokes raytrace regexp richards splay"/>
   </target>
 
   <!-- box2d -->
   <target name="octane-box2d" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/box2d.js"/>
+      <param name="octane-tests" value="box2d"/>
     </antcall>
   </target>
 
   <target name="octane-box2d-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/box2d.js"/>
+      <param name="octane-tests" value="box2d"/>
     </antcall>
   </target>
 
   <target name="octane-box2d-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/box2d.js"/>
+      <param name="octane-tests" value="box2d"/>
     </antcall>
   </target>
 
+
   <!-- code-load -->  
   <target name="octane-code-load" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/code-load.js"/>
+      <param name="octane-tests" value="code-load"/>
     </antcall>
   </target>
 
   <target name="octane-code-load-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/code-load.js"/>
+      <param name="octane-tests" value="code-load"/>
     </antcall>
   </target>
 
   <target name="octane-code-load-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/code-load.js"/>
+      <param name="octane-tests" value="code-load"/>
     </antcall>
   </target>
 
+
   <!-- crypto -->
   <target name="octane-crypto" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/crypto.js"/>
+      <param name="octane-tests" value="crypto"/>
     </antcall>
   </target>
 
   <target name="octane-crypto-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/crypto.js"/>
+      <param name="octane-tests" value="crypto"/>
     </antcall>
   </target>
 
   <target name="octane-crypto-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/crypto.js"/>
+      <param name="octane-tests" value="crypto"/>
     </antcall>
   </target>
 
+
   <!-- deltablue -->
   <target name="octane-deltablue" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/deltablue.js"/>
+      <param name="octane-tests" value="deltablue"/>
     </antcall>
   </target>
 
   <target name="octane-deltablue-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/deltablue.js"/>
+      <param name="octane-tests" value="deltablue"/>
     </antcall>
   </target>
 
   <target name="octane-deltablue-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/deltablue.js"/>
+      <param name="octane-tests" value="deltablue"/>
     </antcall>
   </target>
 
+
   <!-- earley-boyer -->
   <target name="octane-earley-boyer" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/earley-boyer.js"/>
+      <param name="octane-tests" value="earley-boyer"/>
     </antcall>
   </target>
 
   <target name="octane-earley-boyer-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/earley-boyer.js"/>
+      <param name="octane-tests" value="earley-boyer"/>
     </antcall>
   </target>
 
   <target name="octane-earley-boyer-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/earley-boyer.js"/>
+      <param name="octane-tests" value="earley-boyer"/>
     </antcall>
   </target>
 
+
   <!-- gbemu -->  
   <target name="octane-gbemu" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/gbemu.js"/>
+      <param name="octane-tests" value="gbemu"/>
     </antcall>
   </target>
 
   <target name="octane-gbemu-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/gbemu.js"/>
+      <param name="octane-tests" value="gbemu"/>
     </antcall>
   </target>
 
   <target name="octane-gbemu-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/gbemu.js"/>
+      <param name="octane-tests" value="gbemu"/>
     </antcall>
   </target>
 
+
   <!-- mandreel -->  
   <target name="octane-mandreel" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/mandreel.js"/>
+      <param name="octane-tests" value="mandreel"/>
     </antcall>
   </target>
 
   <target name="octane-mandreel-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/mandreel.js"/>
+      <param name="octane-tests" value="mandreel"/>
     </antcall>
   </target>
 
   <target name="octane-mandreel-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/mandreel.js"/>
+      <param name="octane-tests" value="mandreel"/>
     </antcall>
   </target>
 
+
   <!-- navier-stokes -->
   <target name="octane-navier-stokes" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/navier-stokes.js"/>
+      <param name="octane-tests" value="navier-stokes"/>
     </antcall>
   </target>
 
   <target name="octane-navier-stokes-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/navier-stokes.js"/>
+      <param name="octane-tests" value="navier-stokes"/>
     </antcall>
   </target>
 
   <target name="octane-navier-stokes-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/navier-stokes.js"/>
+      <param name="octane-tests" value="navier-stokes"/>
     </antcall>
   </target>
 
+
   <!-- pdfjs -->  
   <target name="octane-pdfjs" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/pdfjs.js"/>
+      <param name="octane-tests" value="pdfjs"/>
     </antcall>
   </target>
 
   <target name="octane-pdfjs-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/pdfjs.js"/>
+      <param name="octane-tests" value="pdfjs"/>
     </antcall>
   </target>
 
   <target name="octane-pdfjs-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/pdfjs.js"/>
+      <param name="octane-tests" value="pdfjs"/>
     </antcall>
   </target>
 
+
   <!-- raytrace -->
   <target name="octane-raytrace" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/raytrace.js"/>
+      <param name="octane-tests" value="raytrace"/>
     </antcall>
   </target>
 
   <target name="octane-raytrace-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/raytrace.js"/>
+      <param name="octane-tests" value="raytrace"/>
     </antcall>
   </target>
 
   <target name="octane-raytrace-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/raytrace.js"/>
+      <param name="octane-tests" value="raytrace"/>
     </antcall>
   </target>
 
+
   <!-- regexp -->
   <target name="octane-regexp" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/regexp.js"/>
+      <param name="octane-tests" value="regexp"/>
     </antcall>
   </target>
 
   <target name="octane-regexp-octane-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/regexp.js"/>
+      <param name="octane-tests" value="regexp"/>
     </antcall>
   </target>
 
   <target name="octane-regexp-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/regexp.js"/>
+      <param name="octane-tests" value="regexp"/>
     </antcall>
   </target>
 
+
   <!-- richards -->
   <target name="octane-richards" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/richards.js"/>
+      <param name="octane-tests" value="richards"/>
     </antcall>
   </target>
 
   <target name="octane-richards-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/richards.js"/>
+      <param name="octane-tests" value="richards"/>
     </antcall>
   </target>
 
   <target name="octane-richards-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/richards.js"/>
+      <param name="octane-tests" value="richards"/>
     </antcall>
   </target>
 
+
   <!-- splay -->
   <target name="octane-splay" depends="jar">
     <antcall target="run-octane">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/splay.js"/>
+      <param name="octane-tests" value="splay"/>
     </antcall>
   </target>
 
   <target name="octane-splay-v8" depends="jar">
     <antcall target="run-octane-v8">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/splay.js"/>
+      <param name="octane-tests" value="splay"/>
     </antcall>
   </target>
 
   <target name="octane-splay-rhino" depends="jar">
     <antcall target="run-octane-rhino">
-      <param name="octane-tests" value="${octane-test-sys-prop.test.js.roots}/splay.js"/>
+      <param name="octane-tests" value="splay"/>
     </antcall>
   </target>
 
@@ -307,7 +319,7 @@
   </target>
 
   <!-- run octane benchmarks using Rhino as runtime -->
-  <target name="octane-rhino" depends="octane-init">
+  <target name="octane-rhino" depends="octane-init-rhino">
     <antcall target="run-octane-rhino"/>
   </target>
   
diff --git a/make/build.xml b/make/build.xml
index d884b2fe..7c05e789 100644
--- a/make/build.xml
+++ b/make/build.xml
@@ -212,7 +212,9 @@
            target="${javac.target}"
            debug="${javac.debug}"
            encoding="${javac.encoding}"
-           includeantruntime="false"/>
+           includeantruntime="false">
+        <compilerarg line="-extdirs &quot;&quot;"/>
+    </javac>
 
     <!-- tests that check nashorn internals and internal API -->
     <jar jarfile="${nashorn.internal.tests.jar}">
@@ -305,6 +307,8 @@
       <include name="**/codegen/*Test.class"/>
       <include name="**/parser/*Test.class"/>
       <include name="**/runtime/*Test.class"/>
+      <include name="**/runtime/regexp/*Test.class"/>
+      <include name="**/runtime/regexp/joni/*Test.class"/>
       <include name="**/framework/*Test.class"/>
     </fileset>
 
diff --git a/make/code_coverage.xml b/make/code_coverage.xml
index 33980bdf..3e2860f8 100644
--- a/make/code_coverage.xml
+++ b/make/code_coverage.xml
@@ -139,6 +139,32 @@
       <arg value="${cc.merged.xml}"/>
       <arg value="-exclude"/>
       <arg value="com\.oracle\.nashorn\.runtime\.ScriptRuntime*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.javaadapters*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.objects\.annotations*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.scripts*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.lookup\.MethodHandleFactory*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.test\.framework*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.test\.models*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.ir\.debug*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.runtime\.regexp\.joni\.bench*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.runtime\.DebugLogger*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.runtime\.Timing*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.runtime\.Logging*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.runtime\.Debug*"/>
+      <arg value="-exclude"/>
+      <arg value="jdk\.nashorn\.internal\.objects\.NativeDebug*"/>
       <arg line="${cc.all.xmls}"/>
       <classpath>
         <pathelement location="${jcov.jar}"/>
diff --git a/make/project.properties b/make/project.properties
index 2d66dfef..2e3839b6 100644
--- a/make/project.properties
+++ b/make/project.properties
@@ -87,6 +87,7 @@ testng.verbose=2
 
 testng.listeners=\
  org.testng.reporters.SuiteHTMLReporter, \
+ org.testng.reporters.TestHTMLReporter, \
  org.testng.reporters.jq.Main, \
  org.testng.reporters.FailedReporter, \
  org.testng.reporters.XMLReporter \
@@ -214,9 +215,13 @@ test.src.dir=test/src
 run.test.xmx=3G
 run.test.xms=2G
 
+run.test.user.language=tr
+run.test.user.country=TR
+
 #  -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+PrintNMethods
 # add '-Dtest.js.outofprocess' to run each test in a new sub-process
-run.test.jvmargs.main=-server -Xmx${run.test.xmx} -XX:+TieredCompilation -ea -Dnashorn.debug=true -Dfile.encoding=UTF-8
+run.test.jvmargs.main=-server -Xmx${run.test.xmx} -XX:+TieredCompilation -ea -Dfile.encoding=UTF-8 -Duser.language=${run.test.user.language} -Duser.country=${run.test.user.country}
+
 #-XX:+HeapDumpOnOutOfMemoryError -XX:-UseCompressedKlassPointers -XX:+PrintHeapAtGC -XX:ClassMetaspaceSize=300M  
 run.test.jvmargs.octane.main=-Xms${run.test.xms} ${run.test.jvmargs.main}
 
diff --git a/src/netscape/javascript/JSObject.java b/src/jdk/nashorn/api/scripting/JSObject.java
index 23054c63..583e8f7a 100644
--- a/src/netscape/javascript/JSObject.java
+++ b/src/jdk/nashorn/api/scripting/JSObject.java
@@ -23,26 +23,12 @@
  * questions.
  */
 
-package netscape.javascript;
-
-import java.applet.Applet;
+package jdk.nashorn.api.scripting;
 
 /**
- * Stub for JSObject to get compilation going.
+ * netscape.javascript.JSObject-like interface for nashorn script objects.
  */
 public abstract class JSObject {
-
-    /**
-     * Get the window for an {@link Applet}. Not supported
-     * by Nashorn
-     *
-     * @param a applet
-     * @return the window instance
-     */
-    public static JSObject getWindow(final Applet a) {
-        throw new UnsupportedOperationException("getWindow");
-    }
-
     /**
      * Call a JavaScript method
      *
diff --git a/src/jdk/nashorn/api/scripting/ScriptObjectMirror.java b/src/jdk/nashorn/api/scripting/ScriptObjectMirror.java
index 266ce87f..e53903d3 100644
--- a/src/jdk/nashorn/api/scripting/ScriptObjectMirror.java
+++ b/src/jdk/nashorn/api/scripting/ScriptObjectMirror.java
@@ -42,7 +42,6 @@ import jdk.nashorn.internal.runtime.Context;
 import jdk.nashorn.internal.runtime.ScriptFunction;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.ScriptRuntime;
-import netscape.javascript.JSObject;
 
 /**
  * Mirror object that wraps a given ScriptObject instance. User can
diff --git a/src/jdk/nashorn/api/scripting/resources/engine.js b/src/jdk/nashorn/api/scripting/resources/engine.js
index e9560728..62d6735e 100644
--- a/src/jdk/nashorn/api/scripting/resources/engine.js
+++ b/src/jdk/nashorn/api/scripting/resources/engine.js
@@ -88,7 +88,7 @@ Object.defineProperty(this, "sprintf", {
             }
         }
 
-        array = Java.toJavaArray(array);
+        array = Java.to(array);
         return Packages.jdk.nashorn.api.scripting.ScriptUtils.format(format, array);
     }
 });
diff --git a/src/jdk/nashorn/internal/codegen/Attr.java b/src/jdk/nashorn/internal/codegen/Attr.java
index 4e47892f..cf3e6946 100644
--- a/src/jdk/nashorn/internal/codegen/Attr.java
+++ b/src/jdk/nashorn/internal/codegen/Attr.java
@@ -84,8 +84,8 @@ import jdk.nashorn.internal.ir.TryNode;
 import jdk.nashorn.internal.ir.UnaryNode;
 import jdk.nashorn.internal.ir.VarNode;
 import jdk.nashorn.internal.ir.WithNode;
-import jdk.nashorn.internal.ir.visitor.NodeOperatorVisitor;
 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
+import jdk.nashorn.internal.ir.visitor.NodeOperatorVisitor;
 import jdk.nashorn.internal.parser.TokenType;
 import jdk.nashorn.internal.runtime.Context;
 import jdk.nashorn.internal.runtime.Debug;
@@ -111,7 +111,7 @@ import jdk.nashorn.internal.runtime.ScriptObject;
  * computed.
  */
 
-final class Attr extends NodeOperatorVisitor {
+final class Attr extends NodeOperatorVisitor<LexicalContext> {
 
     /**
      * Local definitions in current block (to discriminate from function
@@ -138,6 +138,7 @@ final class Attr extends NodeOperatorVisitor {
      * Constructor.
      */
     Attr(final TemporarySymbols temporarySymbols) {
+        super(new LexicalContext());
         this.temporarySymbols = temporarySymbols;
         this.localDefs   = new ArrayDeque<>();
         this.localUses   = new ArrayDeque<>();
@@ -202,7 +203,7 @@ final class Attr extends NodeOperatorVisitor {
     private void acceptDeclarations(final FunctionNode functionNode, final Block body) {
         // This visitor will assign symbol to all declared variables, except function declarations (which are taken care
         // in a separate step above) and "var" declarations in for loop initializers.
-        body.accept(new NodeOperatorVisitor() {
+        body.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             @Override
             public boolean enterFunctionNode(final FunctionNode nestedFn) {
                 return false;
@@ -218,7 +219,7 @@ final class Attr extends NodeOperatorVisitor {
                     if (varNode.isFunctionDeclaration()) {
                         newType(symbol, FunctionNode.FUNCTION_TYPE);
                     }
-                    return varNode.setName((IdentNode)ident.setSymbol(getLexicalContext(), symbol));
+                    return varNode.setName((IdentNode)ident.setSymbol(lc, symbol));
                 }
                 return varNode;
             }
@@ -227,8 +228,8 @@ final class Attr extends NodeOperatorVisitor {
 
     private void enterFunctionBody() {
 
-        final FunctionNode functionNode = getLexicalContext().getCurrentFunction();
-        final Block body = getLexicalContext().getCurrentBlock();
+        final FunctionNode functionNode = lc.getCurrentFunction();
+        final Block body = lc.getCurrentBlock();
 
         initFunctionWideVariables(functionNode, body);
 
@@ -256,7 +257,7 @@ final class Attr extends NodeOperatorVisitor {
         //the symbols in the block should really be stateless
         block.clearSymbols();
 
-        if (getLexicalContext().isFunctionBody()) {
+        if (lc.isFunctionBody()) {
             enterFunctionBody();
         }
         pushLocalsBlock();
@@ -283,7 +284,7 @@ final class Attr extends NodeOperatorVisitor {
     @Override
     public boolean enterCatchNode(final CatchNode catchNode) {
         final IdentNode exception = catchNode.getException();
-        final Block     block     = getLexicalContext().getCurrentBlock();
+        final Block     block     = lc.getCurrentBlock();
 
         start(catchNode);
 
@@ -298,10 +299,10 @@ final class Attr extends NodeOperatorVisitor {
     @Override
     public Node leaveCatchNode(final CatchNode catchNode) {
         final IdentNode exception = catchNode.getException();
-        final Block  block        = getLexicalContext().getCurrentBlock();
+        final Block  block        = lc.getCurrentBlock();
         final Symbol symbol       = findSymbol(block, exception.getName());
         assert symbol != null;
-        return end(catchNode.setException((IdentNode)exception.setSymbol(getLexicalContext(), symbol)));
+        return end(catchNode.setException((IdentNode)exception.setSymbol(lc, symbol)));
     }
 
     /**
@@ -320,7 +321,7 @@ final class Attr extends NodeOperatorVisitor {
             flags |= IS_SCOPE;
         }
 
-        final FunctionNode function = getLexicalContext().getFunction(block);
+        final FunctionNode function = lc.getFunction(block);
         if (symbol != null) {
             // Symbol was already defined. Check if it needs to be redefined.
             if ((flags & KINDMASK) == IS_PARAM) {
@@ -353,12 +354,12 @@ final class Attr extends NodeOperatorVisitor {
             if ((flags & Symbol.KINDMASK) == IS_VAR && ((flags & IS_INTERNAL) == IS_INTERNAL || (flags & IS_LET) == IS_LET)) {
                 symbolBlock = block; //internal vars are always defined in the block closest to them
             } else {
-                symbolBlock = getLexicalContext().getFunctionBody(function);
+                symbolBlock = lc.getFunctionBody(function);
             }
 
             // Create and add to appropriate block.
             symbol = new Symbol(name, flags);
-            symbolBlock.putSymbol(getLexicalContext(), symbol);
+            symbolBlock.putSymbol(lc, symbol);
 
             if ((flags & Symbol.KINDMASK) != IS_GLOBAL) {
                 symbol.setNeedsSlot(true);
@@ -381,7 +382,7 @@ final class Attr extends NodeOperatorVisitor {
         //an outermost function in our lexical context that is not a program (runScript)
         //is possible - it is a function being compiled lazily
         if (functionNode.isDeclared()) {
-            final Iterator<Block> blocks = getLexicalContext().getBlocks();
+            final Iterator<Block> blocks = lc.getBlocks();
             if (blocks.hasNext()) {
                 defineSymbol(blocks.next(), functionNode.getIdent().getName(), IS_VAR);
             }
@@ -397,13 +398,11 @@ final class Attr extends NodeOperatorVisitor {
     public Node leaveFunctionNode(final FunctionNode functionNode) {
         FunctionNode newFunctionNode = functionNode;
 
-        final LexicalContext lc = getLexicalContext();
-
         final Block body = newFunctionNode.getBody();
 
         //look for this function in the parent block
         if (functionNode.isDeclared()) {
-            final Iterator<Block> blocks = getLexicalContext().getBlocks();
+            final Iterator<Block> blocks = lc.getBlocks();
             if (blocks.hasNext()) {
                 newFunctionNode = (FunctionNode)newFunctionNode.setSymbol(lc, findSymbol(blocks.next(), functionNode.getIdent().getName()));
             }
@@ -411,7 +410,7 @@ final class Attr extends NodeOperatorVisitor {
             final boolean anonymous = functionNode.isAnonymous();
             final String  name      = anonymous ? null : functionNode.getIdent().getName();
             if (anonymous || body.getExistingSymbol(name) != null) {
-                newFunctionNode = (FunctionNode)ensureSymbol(lc, FunctionNode.FUNCTION_TYPE, newFunctionNode);
+                newFunctionNode = (FunctionNode)ensureSymbol(FunctionNode.FUNCTION_TYPE, newFunctionNode);
             } else {
                 assert name != null;
                 final Symbol self = body.getExistingSymbol(name);
@@ -490,8 +489,6 @@ final class Attr extends NodeOperatorVisitor {
 
         start(identNode);
 
-        final LexicalContext lc = getLexicalContext();
-
         if (identNode.isPropertyName()) {
             // assign a pseudo symbol to property name
             final Symbol pseudoSymbol = pseudoSymbol(name);
@@ -549,7 +546,7 @@ final class Attr extends NodeOperatorVisitor {
      */
     private void maybeForceScope(final Symbol symbol) {
         if (!symbol.isScope() && symbolNeedsToBeScope(symbol)) {
-            Symbol.setSymbolIsScope(getLexicalContext(), symbol);
+            Symbol.setSymbolIsScope(lc, symbol);
         }
     }
 
@@ -558,7 +555,7 @@ final class Attr extends NodeOperatorVisitor {
             return false;
         }
         boolean previousWasBlock = false;
-        for(final Iterator<LexicalContextNode> it = getLexicalContext().getAllNodes(); it.hasNext();) {
+        for(final Iterator<LexicalContextNode> it = lc.getAllNodes(); it.hasNext();) {
             final LexicalContextNode node = it.next();
             if(node instanceof FunctionNode) {
                 // We reached the function boundary without seeing a definition for the symbol - it needs to be in
@@ -594,10 +591,8 @@ final class Attr extends NodeOperatorVisitor {
         }
 
         if (symbol.isScope()) {
-            final LexicalContext lc = getLexicalContext();
-
             Block scopeBlock = null;
-            for (final Iterator<LexicalContextNode> contextNodeIter = getLexicalContext().getAllNodes(); contextNodeIter.hasNext(); ) {
+            for (final Iterator<LexicalContextNode> contextNodeIter = lc.getAllNodes(); contextNodeIter.hasNext(); ) {
                 final LexicalContextNode node = contextNodeIter.next();
                 if (node instanceof Block) {
                     if (((Block)node).getExistingSymbol(name) != null) {
@@ -610,7 +605,7 @@ final class Attr extends NodeOperatorVisitor {
             }
 
             if (scopeBlock != null) {
-                assert getLexicalContext().contains(scopeBlock);
+                assert lc.contains(scopeBlock);
                 lc.setFlag(scopeBlock, Block.NEEDS_SCOPE);
             }
         }
@@ -622,8 +617,8 @@ final class Attr extends NodeOperatorVisitor {
      * @see #needsParentScope()
      */
     private void setUsesGlobalSymbol() {
-        for (final Iterator<FunctionNode> fns = getLexicalContext().getFunctions(); fns.hasNext();) {
-            getLexicalContext().setFlag(fns.next(), FunctionNode.USES_ANCESTOR_SCOPE);
+        for (final Iterator<FunctionNode> fns = lc.getFunctions(); fns.hasNext();) {
+            lc.setFlag(fns.next(), FunctionNode.USES_ANCESTOR_SCOPE);
         }
     }
 
@@ -635,7 +630,7 @@ final class Attr extends NodeOperatorVisitor {
     private Symbol findSymbol(final Block block, final String name) {
         // Search up block chain to locate symbol.
 
-        for (final Iterator<Block> blocks = getLexicalContext().getBlocks(block); blocks.hasNext();) {
+        for (final Iterator<Block> blocks = lc.getBlocks(block); blocks.hasNext();) {
             // Find name.
             final Symbol symbol = blocks.next().getExistingSymbol(name);
             // If found then we are good.
@@ -656,11 +651,11 @@ final class Attr extends NodeOperatorVisitor {
     public Node leaveLiteralNode(final LiteralNode literalNode) {
         assert !literalNode.isTokenType(TokenType.THIS) : "tokentype for " + literalNode + " is this"; //guard against old dead code case. literal nodes should never inherit tokens
         assert literalNode instanceof ArrayLiteralNode || !(literalNode.getValue() instanceof Node) : "literals with Node values not supported";
-        final Symbol symbol = new Symbol(getLexicalContext().getCurrentFunction().uniqueName(LITERAL_PREFIX.symbolName()), IS_CONSTANT, literalNode.getType());
+        final Symbol symbol = new Symbol(lc.getCurrentFunction().uniqueName(LITERAL_PREFIX.symbolName()), IS_CONSTANT, literalNode.getType());
         if (literalNode instanceof ArrayLiteralNode) {
             ((ArrayLiteralNode)literalNode).analyze();
         }
-        return end(literalNode.setSymbol(getLexicalContext(), symbol));
+        return end(literalNode.setSymbol(lc, symbol));
     }
 
     @Override
@@ -676,7 +671,7 @@ final class Attr extends NodeOperatorVisitor {
     @Override
     public Node leavePropertyNode(final PropertyNode propertyNode) {
         // assign a pseudo symbol to property name, see NASHORN-710
-        return propertyNode.setSymbol(getLexicalContext(), new Symbol(propertyNode.getKeyName(), 0, Type.OBJECT));
+        return propertyNode.setSymbol(lc, new Symbol(propertyNode.getKeyName(), 0, Type.OBJECT));
     }
 
     @Override
@@ -734,11 +729,11 @@ final class Attr extends NodeOperatorVisitor {
             type = Type.OBJECT;
         }
 
-        switchNode.setTag(newInternal(getLexicalContext().getCurrentFunction().uniqueName(SWITCH_TAG_PREFIX.symbolName()), type));
+        switchNode.setTag(newInternal(lc.getCurrentFunction().uniqueName(SWITCH_TAG_PREFIX.symbolName()), type));
 
         end(switchNode);
 
-        return switchNode.setCases(getLexicalContext(), newCases);
+        return switchNode.setCases(lc, newCases);
     }
 
     @Override
@@ -761,7 +756,7 @@ final class Attr extends NodeOperatorVisitor {
         final IdentNode ident = varNode.getName();
         final String    name  = ident.getName();
 
-        final Symbol symbol = defineSymbol(getLexicalContext().getCurrentBlock(), name, IS_VAR);
+        final Symbol symbol = defineSymbol(lc.getCurrentBlock(), name, IS_VAR);
         assert symbol != null;
 
         // NASHORN-467 - use before definition of vars - conservative
@@ -781,7 +776,6 @@ final class Attr extends NodeOperatorVisitor {
         final IdentNode ident = newVarNode.getName();
         final String    name  = ident.getName();
 
-        final LexicalContext lc = getLexicalContext();
         final Symbol  symbol = findSymbol(lc.getCurrentBlock(), ident.getName());
 
         if (init == null) {
@@ -834,7 +828,7 @@ final class Attr extends NodeOperatorVisitor {
 
     @Override
     public Node leaveDELETE(final UnaryNode unaryNode) {
-        final FunctionNode   currentFunctionNode = getLexicalContext().getCurrentFunction();
+        final FunctionNode   currentFunctionNode = lc.getCurrentFunction();
         final boolean        strictMode          = currentFunctionNode.isStrict();
         final Node           rhs                 = unaryNode.rhs();
         final Node           strictFlagNode      = LiteralNode.newInstance(unaryNode, strictMode).accept(this);
@@ -894,10 +888,10 @@ final class Attr extends NodeOperatorVisitor {
      * @return true if the symbol denoted by the specified name in the current lexical context defined in the program level.
      */
     private boolean isProgramLevelSymbol(final String name) {
-        for(final Iterator<Block> it = getLexicalContext().getBlocks(); it.hasNext();) {
+        for(final Iterator<Block> it = lc.getBlocks(); it.hasNext();) {
             final Block next = it.next();
             if(next.getExistingSymbol(name) != null) {
-                return next == getLexicalContext().getFunctionBody(getLexicalContext().getOutermostFunction());
+                return next == lc.getFunctionBody(lc.getOutermostFunction());
             }
         }
         throw new AssertionError("Couldn't find symbol " + name + " in the context");
@@ -914,14 +908,14 @@ final class Attr extends NodeOperatorVisitor {
     }
 
     private IdentNode compilerConstant(CompilerConstants cc) {
-        final FunctionNode functionNode = getLexicalContext().getCurrentFunction();
+        final FunctionNode functionNode = lc.getCurrentFunction();
         return (IdentNode)
             new IdentNode(
                 functionNode.getToken(),
                 functionNode.getFinish(),
                 cc.symbolName()).
                 setSymbol(
-                    getLexicalContext(),
+                    lc,
                     functionNode.compilerConstant(cc));
     }
 
@@ -999,7 +993,7 @@ final class Attr extends NodeOperatorVisitor {
         final Node lhs = binaryNode.lhs();
 
         if (lhs instanceof IdentNode) {
-            final Block     block = getLexicalContext().getCurrentBlock();
+            final Block     block = lc.getCurrentBlock();
             final IdentNode ident = (IdentNode)lhs;
             final String    name  = ident.getName();
 
@@ -1043,7 +1037,7 @@ final class Attr extends NodeOperatorVisitor {
     }
 
     private boolean isLocal(FunctionNode function, Symbol symbol) {
-        final FunctionNode definingFn = getLexicalContext().getDefiningFunction(symbol);
+        final FunctionNode definingFn = lc.getDefiningFunction(symbol);
         // Temp symbols are not assigned to a block, so their defining fn is null; those can be assumed local
         return definingFn == null || definingFn == function;
     }
@@ -1329,7 +1323,7 @@ final class Attr extends NodeOperatorVisitor {
     @Override
     public Node leaveForNode(final ForNode forNode) {
         if (forNode.isForIn()) {
-            forNode.setIterator(newInternal(getLexicalContext().getCurrentFunction().uniqueName(ITERATOR_PREFIX.symbolName()), Type.OBJECT)); //NASHORN-73
+            forNode.setIterator(newInternal(lc.getCurrentFunction().uniqueName(ITERATOR_PREFIX.symbolName()), Type.OBJECT)); //NASHORN-73
             /*
              * Iterators return objects, so we need to widen the scope of the
              * init variable if it, for example, has been assigned double type
@@ -1407,7 +1401,7 @@ final class Attr extends NodeOperatorVisitor {
             final Symbol paramSymbol = functionNode.getBody().getExistingSymbol(param.getName());
             assert paramSymbol != null;
             assert paramSymbol.isParam();
-            newParams.add((IdentNode)param.setSymbol(getLexicalContext(), paramSymbol));
+            newParams.add((IdentNode)param.setSymbol(lc, paramSymbol));
 
             assert paramSymbol != null;
             Type type = functionNode.getHints().getParameterType(pos);
@@ -1439,10 +1433,10 @@ final class Attr extends NodeOperatorVisitor {
         FunctionNode newFunctionNode = functionNode;
 
         if (nparams == 0 || (specialize * 2) < nparams) {
-            newFunctionNode = newFunctionNode.clearSnapshot(getLexicalContext());
+            newFunctionNode = newFunctionNode.clearSnapshot(lc);
         }
 
-        return newFunctionNode.setParameters(getLexicalContext(), newParams);
+        return newFunctionNode.setParameters(lc, newParams);
     }
 
     /**
@@ -1506,7 +1500,7 @@ final class Attr extends NodeOperatorVisitor {
     }
 
     private Symbol exceptionSymbol() {
-        return newInternal(getLexicalContext().getCurrentFunction().uniqueName(EXCEPTION_PREFIX.symbolName()), Type.typeFor(ECMAException.class));
+        return newInternal(lc.getCurrentFunction().uniqueName(EXCEPTION_PREFIX.symbolName()), Type.typeFor(ECMAException.class));
     }
 
     /**
@@ -1520,8 +1514,8 @@ final class Attr extends NodeOperatorVisitor {
      * @param assignmentDest the destination node of the assignment, e.g. lhs for binary nodes
      */
     private Node ensureAssignmentSlots(final Node assignmentDest) {
-        final LexicalContext attrLexicalContext = getLexicalContext();
-        return assignmentDest.accept(new NodeVisitor() {
+        final LexicalContext attrLexicalContext = lc;
+        return assignmentDest.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             @Override
             public Node leaveIndexNode(final IndexNode indexNode) {
                 assert indexNode.getSymbol().isTemp();
@@ -1565,7 +1559,7 @@ final class Attr extends NodeOperatorVisitor {
         FunctionNode currentFunctionNode = functionNode;
         do {
             changed.clear();
-            final FunctionNode newFunctionNode = (FunctionNode)currentFunctionNode.accept(new NodeVisitor() {
+            final FunctionNode newFunctionNode = (FunctionNode)currentFunctionNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
 
                 private Node widen(final Node node, final Type to) {
                     if (node instanceof LiteralNode) {
@@ -1579,7 +1573,7 @@ final class Attr extends NodeOperatorVisitor {
                             symbol = temporarySymbols.getTypedTemporarySymbol(to);
                         }
                         newType(symbol, to);
-                        final Node newNode = node.setSymbol(getLexicalContext(), symbol);
+                        final Node newNode = node.setSymbol(lc, symbol);
                         changed.add(newNode);
                         return newNode;
                     }
@@ -1622,7 +1616,7 @@ final class Attr extends NodeOperatorVisitor {
                     return newBinaryNode;
                 }
             });
-            getLexicalContext().replace(currentFunctionNode, newFunctionNode);
+            lc.replace(currentFunctionNode, newFunctionNode);
             currentFunctionNode = newFunctionNode;
         } while (!changed.isEmpty());
         return currentFunctionNode;
@@ -1643,12 +1637,12 @@ final class Attr extends NodeOperatorVisitor {
     }
 
     private Node ensureSymbol(final Type type, final Node node) {
-        LOG.info("New TEMPORARY added to ", getLexicalContext().getCurrentFunction().getName(), " type=", type);
-        return ensureSymbol(getLexicalContext(), type, node);
+        LOG.info("New TEMPORARY added to ", lc.getCurrentFunction().getName(), " type=", type);
+        return temporarySymbols.ensureSymbol(lc, type, node);
     }
 
     private Symbol newInternal(final String name, final Type type) {
-        final Symbol iter = defineSymbol(getLexicalContext().getCurrentBlock(), name, IS_VAR | IS_INTERNAL);
+        final Symbol iter = defineSymbol(lc.getCurrentBlock(), name, IS_VAR | IS_INTERNAL);
         iter.setType(type); // NASHORN-73
         return iter;
     }
@@ -1705,10 +1699,6 @@ final class Attr extends NodeOperatorVisitor {
         localUses.peek().add(name);
     }
 
-    private Node ensureSymbol(final LexicalContext lc, final Type type, final Node node) {
-        return temporarySymbols.ensureSymbol(lc, type, node);
-    }
-
     /**
      * Pessimistically promote all symbols in current function node to Object types
      * This is done when the function contains unevaluated black boxes such as
@@ -1717,7 +1707,7 @@ final class Attr extends NodeOperatorVisitor {
      * @param body body for the function node we are leaving
      */
     private static void objectifySymbols(final Block body) {
-        body.accept(new NodeVisitor() {
+        body.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             private void toObject(final Block block) {
                 for (final Symbol symbol : block.getSymbols()) {
                     if (!symbol.isTemp()) {
@@ -1761,7 +1751,7 @@ final class Attr extends NodeOperatorVisitor {
                 append("] ").
                 append(printNode ? node.toString() : "").
                 append(" in '").
-                append(getLexicalContext().getCurrentFunction().getName()).
+                append(lc.getCurrentFunction().getName()).
                 append("'");
             LOG.info(sb);
             LOG.indent();
@@ -1787,7 +1777,7 @@ final class Attr extends NodeOperatorVisitor {
                 append("] ").
                 append(printNode ? node.toString() : "").
                 append(" in '").
-                append(getLexicalContext().getCurrentFunction().getName());
+                append(lc.getCurrentFunction().getName());
 
             if (node.getSymbol() == null) {
                 sb.append(" <NO SYMBOL>");
diff --git a/src/jdk/nashorn/internal/codegen/CodeGenerator.java b/src/jdk/nashorn/internal/codegen/CodeGenerator.java
index 1fae1294..21b61cd8 100644
--- a/src/jdk/nashorn/internal/codegen/CodeGenerator.java
+++ b/src/jdk/nashorn/internal/codegen/CodeGenerator.java
@@ -52,16 +52,13 @@ import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.CALL
 import static jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor.CALLSITE_STRICT;
 
 import java.io.PrintWriter;
-import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Deque;
 import java.util.EnumSet;
-import java.util.HashMap;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
-import java.util.Map;
+import java.util.Locale;
 import java.util.TreeMap;
 
 import jdk.nashorn.internal.codegen.ClassEmitter.Flag;
@@ -83,11 +80,11 @@ import jdk.nashorn.internal.ir.EmptyNode;
 import jdk.nashorn.internal.ir.ExecuteNode;
 import jdk.nashorn.internal.ir.ForNode;
 import jdk.nashorn.internal.ir.FunctionNode;
+import jdk.nashorn.internal.ir.LexicalContext;
 import jdk.nashorn.internal.ir.FunctionNode.CompilationState;
 import jdk.nashorn.internal.ir.IdentNode;
 import jdk.nashorn.internal.ir.IfNode;
 import jdk.nashorn.internal.ir.IndexNode;
-import jdk.nashorn.internal.ir.LexicalContext;
 import jdk.nashorn.internal.ir.LexicalContextNode;
 import jdk.nashorn.internal.ir.LiteralNode;
 import jdk.nashorn.internal.ir.LiteralNode.ArrayLiteralNode;
@@ -150,7 +147,7 @@ import jdk.nashorn.internal.runtime.linker.LinkerCallSite;
  * The CodeGenerator visits nodes only once, tags them as resolved and emits
  * bytecode for them.
  */
-final class CodeGenerator extends NodeOperatorVisitor {
+final class CodeGenerator extends NodeOperatorVisitor<CodeGeneratorLexicalContext> {
 
     /** Name of the Global object, cannot be referred to as .class, @see CodeGenerator */
     private static final String GLOBAL_OBJECT = Compiler.OBJECTS_PACKAGE + '/' + "Global";
@@ -168,23 +165,12 @@ final class CodeGenerator extends NodeOperatorVisitor {
     /** How many regexp fields have been emitted */
     private int regexFieldCount;
 
-    /** Map of shared scope call sites */
-    private final Map<SharedScopeCall, SharedScopeCall> scopeCalls = new HashMap<>();
-
-    /** Compile unit stack - every time we start a sub method (e.g. a split) we push one */
-    private final Deque<CompileUnit> compileUnits = new ArrayDeque<>();
-
-    /** Method emitter stack - every time we start a sub method (e.g. a split) we push one */
-    private final Deque<MethodEmitter> methodEmitters = new ArrayDeque<>();
-
-    /** The discard stack - whenever we enter a discard node we keep track of its return value status -
-     *  i.e. should we keep it or throw it away */
-    private final Deque<Node> discard = new ArrayDeque<>();
+    /** Line number for last statement. If we encounter a new line number, line number bytecode information
+     *  needs to be generated */
+    private int lastLineNumber = -1;
 
-    // A stack tracking the next free local variable slot in the blocks. There's one entry for every block
-    // currently on the lexical context stack.
-    private int[] nextFreeSlots = new int[16];
-    private int nextFreeSlotsSize = 0;
+    /** When should we stop caching regexp expressions in fields to limit bytecode size? */
+    private static final int MAX_REGEX_FIELDS = 2 * 1024;
 
     /** Current method emitter */
     private MethodEmitter method;
@@ -192,20 +178,16 @@ final class CodeGenerator extends NodeOperatorVisitor {
     /** Current compile unit */
     private CompileUnit unit;
 
-    private int lastLineNumber = -1;
-
-    /** When should we stop caching regexp expressions in fields to limit bytecode size? */
-    private static final int MAX_REGEX_FIELDS = 2 * 1024;
-
     private static final DebugLogger LOG   = new DebugLogger("codegen", "nashorn.codegen.debug");
 
+
     /**
      * Constructor.
      *
      * @param compiler
      */
     CodeGenerator(final Compiler compiler) {
-        super(new DynamicScopeTrackingLexicalContext());
+        super(new CodeGeneratorLexicalContext());
         this.compiler      = compiler;
         this.callSiteFlags = compiler.getEnv()._callsite_flags;
     }
@@ -217,37 +199,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
      * @return the correct flags for a call site in the current function
      */
     int getCallSiteFlags() {
-        return getLexicalContext().getCurrentFunction().isStrict() ? callSiteFlags | CALLSITE_STRICT : callSiteFlags;
-    }
-
-    private void pushMethodEmitter(final MethodEmitter newMethod) {
-        methodEmitters.push(newMethod);
-        this.method = newMethod;
-    }
-
-    private void popMethodEmitter(final MethodEmitter oldMethod) {
-        assert methodEmitters.peek() == oldMethod;
-        methodEmitters.pop();
-        if (!methodEmitters.isEmpty()) {
-            this.method = methodEmitters.peek();
-        } else {
-            this.method = null;
-        }
-    }
-
-    private void push(final CompileUnit newUnit) {
-        compileUnits.push(newUnit);
-        this.unit = newUnit;
-    }
-
-    private void pop(final CompileUnit oldUnit) {
-        assert compileUnits.peek() == oldUnit;
-        compileUnits.pop();
-        if (!compileUnits.isEmpty()) {
-            this.unit = compileUnits.peek();
-        } else {
-            this.unit = null;
-        }
+        return lc.getCurrentFunction().isStrict() ? callSiteFlags | CALLSITE_STRICT : callSiteFlags;
     }
 
     /**
@@ -265,7 +217,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
         }
 
         final String name   = symbol.getName();
-        final Source source = getLexicalContext().getCurrentFunction().getSource();
+        final Source source = lc.getCurrentFunction().getSource();
 
         if (CompilerConstants.__FILE__.name().equals(name)) {
             return method.load(source.getName());
@@ -291,88 +243,43 @@ final class CodeGenerator extends NodeOperatorVisitor {
     }
 
     /**
-     * A lexical context that also tracks if we have any dynamic scopes in the context. Such scopes can have new
-     * variables introduced into them at run time - a with block or a function directly containing an eval call.
-     */
-    private static class DynamicScopeTrackingLexicalContext extends LexicalContext {
-        int dynamicScopeCount = 0;
-
-        @Override
-        public <T extends LexicalContextNode> T push(T node) {
-            if(isDynamicScopeBoundary(node)) {
-                ++dynamicScopeCount;
-            }
-            return super.push(node);
-        }
-
-        @Override
-        public <T extends LexicalContextNode> T pop(T node) {
-            final T popped = super.pop(node);
-            if(isDynamicScopeBoundary(popped)) {
-                --dynamicScopeCount;
-            }
-            return popped;
-        }
-
-        private boolean isDynamicScopeBoundary(LexicalContextNode node) {
-            if(node instanceof Block) {
-                // Block's immediate parent is a with node. Note we aren't testing for a WithNode, as that'd capture
-                // processing of WithNode.expression too, but it should be unaffected.
-                return !isEmpty() && peek() instanceof WithNode;
-            } else if(node instanceof FunctionNode) {
-                // Function has a direct eval in it (so a top-level "var ..." in the eval code can introduce a new
-                // variable into the function's scope), and it isn't strict (as evals in strict functions get an
-                // isolated scope).
-                return isFunctionDynamicScope((FunctionNode)node);
-            }
-            return false;
-        }
-    }
-
-    boolean inDynamicScope() {
-        return ((DynamicScopeTrackingLexicalContext)getLexicalContext()).dynamicScopeCount > 0;
-    }
-
-    static boolean isFunctionDynamicScope(FunctionNode fn) {
-        return fn.hasEval() && !fn.isStrict();
-    }
-
-    /**
      * Check if this symbol can be accessed directly with a putfield or getfield or dynamic load
      *
      * @param function function to check for fast scope
      * @return true if fast scope
      */
     private boolean isFastScope(final Symbol symbol) {
-        if(!symbol.isScope()) {
+        if (!symbol.isScope()) {
             return false;
         }
-        final LexicalContext lc = getLexicalContext();
-        if(!inDynamicScope()) {
+
+        if (!lc.inDynamicScope()) {
             // If there's no with or eval in context, and the symbol is marked as scoped, it is fast scoped. Such a
             // symbol must either be global, or its defining block must need scope.
             assert symbol.isGlobal() || lc.getDefiningBlock(symbol).needsScope() : symbol.getName();
             return true;
         }
-        if(symbol.isGlobal()) {
+
+        if (symbol.isGlobal()) {
             // Shortcut: if there's a with or eval in context, globals can't be fast scoped
             return false;
         }
+
         // Otherwise, check if there's a dynamic scope between use of the symbol and its definition
         final String name = symbol.getName();
         boolean previousWasBlock = false;
         for (final Iterator<LexicalContextNode> it = lc.getAllNodes(); it.hasNext();) {
             final LexicalContextNode node = it.next();
-            if(node instanceof Block) {
+            if (node instanceof Block) {
                 // If this block defines the symbol, then we can fast scope the symbol.
                 final Block block = (Block)node;
-                if(block.getExistingSymbol(name) == symbol) {
+                if (block.getExistingSymbol(name) == symbol) {
                     assert block.needsScope();
                     return true;
                 }
                 previousWasBlock = true;
             } else {
-                if((node instanceof WithNode && previousWasBlock) || (node instanceof FunctionNode && isFunctionDynamicScope((FunctionNode)node))) {
+                if ((node instanceof WithNode && previousWasBlock) || (node instanceof FunctionNode && CodeGeneratorLexicalContext.isFunctionDynamicScope((FunctionNode)node))) {
                     // If we hit a scope that can have symbols introduced into it at run time before finding the defining
                     // block, the symbol can't be fast scoped. A WithNode only counts if we've immediately seen a block
                     // before - its block. Otherwise, we are currently processing the WithNode's expression, and that's
@@ -387,16 +294,14 @@ final class CodeGenerator extends NodeOperatorVisitor {
     }
 
     private MethodEmitter loadSharedScopeVar(final Type valueType, final Symbol symbol, final int flags) {
-        method.load(isFastScope(symbol) ? getScopeProtoDepth(getLexicalContext().getCurrentBlock(), symbol) : -1);
-        final SharedScopeCall scopeCall = getScopeGet(valueType, symbol, flags | CALLSITE_FAST_SCOPE);
-        scopeCall.generateInvoke(method);
-        return method;
+        method.load(isFastScope(symbol) ? getScopeProtoDepth(lc.getCurrentBlock(), symbol) : -1);
+        final SharedScopeCall scopeCall = lc.getScopeGet(unit, valueType, symbol, flags | CALLSITE_FAST_SCOPE);
+        return scopeCall.generateInvoke(method);
     }
 
     private MethodEmitter loadFastScopeVar(final Type valueType, final Symbol symbol, final int flags, final boolean isMethod) {
         loadFastScopeProto(symbol, false);
-        method.dynamicGet(valueType, symbol.getName(), flags | CALLSITE_FAST_SCOPE, isMethod);
-        return method;
+        return method.dynamicGet(valueType, symbol.getName(), flags | CALLSITE_FAST_SCOPE, isMethod);
     }
 
     private MethodEmitter storeFastScopeVar(final Type valueType, final Symbol symbol, final int flags) {
@@ -408,7 +313,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
     private int getScopeProtoDepth(final Block startingBlock, final Symbol symbol) {
         int depth = 0;
         final String name = symbol.getName();
-        for(final Iterator<Block> blocks = getLexicalContext().getBlocks(startingBlock); blocks.hasNext();) {
+        for(final Iterator<Block> blocks = lc.getBlocks(startingBlock); blocks.hasNext();) {
             final Block currentBlock = blocks.next();
             if (currentBlock.getExistingSymbol(name) == symbol) {
                 return depth;
@@ -421,7 +326,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
     }
 
     private void loadFastScopeProto(final Symbol symbol, final boolean swap) {
-        final int depth = getScopeProtoDepth(getLexicalContext().getCurrentBlock(), symbol);
+        final int depth = getScopeProtoDepth(lc.getCurrentBlock(), symbol);
         assert depth != -1;
         if (depth > 0) {
             if (swap) {
@@ -464,7 +369,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
          */
         final CodeGenerator codegen = this;
 
-        node.accept(new NodeVisitor() {
+        node.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             @Override
             public boolean enterIdentNode(final IdentNode identNode) {
                 loadIdent(identNode);
@@ -538,7 +443,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
             final boolean isInternal = symbol.isParam() || symbol.isInternal() || symbol.isThis() || !symbol.canBeUndefined();
 
             if (symbol.hasSlot() && !isInternal) {
-                assert symbol.getSymbolType().isNumber() || symbol.getSymbolType().isObject() : "no potentially undefined narrower local vars than doubles are allowed: " + symbol + " in " + getLexicalContext().getCurrentFunction();
+                assert symbol.getSymbolType().isNumber() || symbol.getSymbolType().isObject() : "no potentially undefined narrower local vars than doubles are allowed: " + symbol + " in " + lc.getCurrentFunction();
                 if (symbol.getSymbolType().isNumber()) {
                     numbers.add(symbol);
                 } else if (symbol.getSymbolType().isObject()) {
@@ -595,7 +500,6 @@ final class CodeGenerator extends NodeOperatorVisitor {
         if (block.needsScope() && !block.isTerminal()) {
             popBlockScope(block);
         }
-        --nextFreeSlotsSize;
         return block;
     }
 
@@ -624,11 +528,11 @@ final class CodeGenerator extends NodeOperatorVisitor {
     public boolean enterBreakNode(final BreakNode breakNode) {
         lineNumber(breakNode);
 
-        final BreakableNode breakFrom = getLexicalContext().getBreakable(breakNode.getLabel());
-        for (int i = 0; i < getLexicalContext().getScopeNestingLevelTo(breakFrom); i++) {
+        final BreakableNode breakFrom = lc.getBreakable(breakNode.getLabel());
+        for (int i = 0; i < lc.getScopeNestingLevelTo(breakFrom); i++) {
             closeWith();
         }
-        method.splitAwareGoto(getLexicalContext(), breakFrom.getBreakLabel());
+        method.splitAwareGoto(lc, breakFrom.getBreakLabel());
 
         return false;
     }
@@ -672,11 +576,12 @@ final class CodeGenerator extends NodeOperatorVisitor {
 
         final List<Node>   args            = callNode.getArgs();
         final Node         function        = callNode.getFunction();
-        final Block        currentBlock    = getLexicalContext().getCurrentBlock();
+        final Block        currentBlock    = lc.getCurrentBlock();
+        final CodeGeneratorLexicalContext codegenLexicalContext = lc;
 
-        function.accept(new NodeVisitor() {
+        function.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
 
-            private void sharedScopeCall(final IdentNode identNode, final int flags) {
+            private MethodEmitter sharedScopeCall(final IdentNode identNode, final int flags) {
                 final Symbol symbol = identNode.getSymbol();
                 int    scopeCallFlags = flags;
                 method.loadCompilerConstant(SCOPE);
@@ -688,8 +593,8 @@ final class CodeGenerator extends NodeOperatorVisitor {
                 }
                 loadArgs(args);
                 final Type[] paramTypes = method.getTypesFromStack(args.size());
-                final SharedScopeCall scopeCall = getScopeCall(symbol, identNode.getType(), callNode.getType(), paramTypes, scopeCallFlags);
-                scopeCall.generateInvoke(method);
+                final SharedScopeCall scopeCall = codegenLexicalContext.getScopeCall(unit, symbol, identNode.getType(), callNode.getType(), paramTypes, scopeCallFlags);
+                return scopeCall.generateInvoke(method);
             }
 
             private void scopeCall(final IdentNode node, final int flags) {
@@ -756,7 +661,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
                         evalCall(node, flags);
                     } else if (useCount <= SharedScopeCall.FAST_SCOPE_CALL_THRESHOLD
                             || (!isFastScope(symbol) && useCount <= SharedScopeCall.SLOW_SCOPE_CALL_THRESHOLD)
-                            || CodeGenerator.this.inDynamicScope()) {
+                            || CodeGenerator.this.lc.inDynamicScope()) {
                         scopeCall(node, flags);
                     } else {
                         sharedScopeCall(node, flags);
@@ -845,11 +750,11 @@ final class CodeGenerator extends NodeOperatorVisitor {
     public boolean enterContinueNode(final ContinueNode continueNode) {
         lineNumber(continueNode);
 
-        final LoopNode continueTo = getLexicalContext().getContinueTo(continueNode.getLabel());
-        for (int i = 0; i < getLexicalContext().getScopeNestingLevelTo(continueTo); i++) {
+        final LoopNode continueTo = lc.getContinueTo(continueNode.getLabel());
+        for (int i = 0; i < lc.getScopeNestingLevelTo(continueTo); i++) {
             closeWith();
         }
-        method.splitAwareGoto(getLexicalContext(), continueTo.getContinueLabel());
+        method.splitAwareGoto(lc, continueTo.getContinueLabel());
 
         return false;
     }
@@ -875,90 +780,89 @@ final class CodeGenerator extends NodeOperatorVisitor {
     public boolean enterForNode(final ForNode forNode) {
         lineNumber(forNode);
 
+        if (forNode.isForIn()) {
+            enterForIn(forNode);
+        } else {
+            enterFor(forNode);
+        }
+
+        return false;
+    }
+
+    private void enterFor(final ForNode forNode) {
+        final Node  init   = forNode.getInit();
         final Node  test   = forNode.getTest();
         final Block body   = forNode.getBody();
         final Node  modify = forNode.getModify();
 
-        final Label breakLabel    = forNode.getBreakLabel();
-        final Label continueLabel = forNode.getContinueLabel();
-        final Label loopLabel     = new Label("loop");
-
-        Node init = forNode.getInit();
+        if (init != null) {
+            init.accept(this);
+        }
 
-        if (forNode.isForIn()) {
-            final Symbol iter = forNode.getIterator();
+        final Label loopLabel = new Label("loop");
+        final Label testLabel = new Label("test");
 
-            // We have to evaluate the optional initializer expression
-            // of the iterator variable of the for-in statement.
-            if (init instanceof VarNode) {
-                init.accept(this);
-                init = ((VarNode)init).getName();
-            }
+        method._goto(testLabel);
+        method.label(loopLabel);
+        body.accept(this);
+        method.label(forNode.getContinueLabel());
 
+        if (!body.isTerminal() && modify != null) {
             load(modify);
-            assert modify.getType().isObject();
-            method.invoke(forNode.isForEach() ? ScriptRuntime.TO_VALUE_ITERATOR : ScriptRuntime.TO_PROPERTY_ITERATOR);
-            method.store(iter);
-            method._goto(continueLabel);
-            method.label(loopLabel);
-
-            new Store<Node>(init) {
-                @Override
-                protected void storeNonDiscard() {
-                    return;
-                }
-                @Override
-                protected void evaluate() {
-                    method.load(iter);
-                    method.invoke(interfaceCallNoLookup(Iterator.class, "next", Object.class));
-                }
-            }.store();
-
-            body.accept(this);
+        }
 
-            method.label(continueLabel);
-            method.load(iter);
-            method.invoke(interfaceCallNoLookup(Iterator.class, "hasNext", boolean.class));
-            method.ifne(loopLabel);
-            method.label(breakLabel);
+        method.label(testLabel);
+        if (test != null) {
+            new BranchOptimizer(this, method).execute(test, loopLabel, true);
         } else {
-            if (init != null) {
-                init.accept(this);
-            }
+            method._goto(loopLabel);
+        }
 
-            final Label testLabel = new Label("test");
+        method.label(forNode.getBreakLabel());
+    }
 
-            method._goto(testLabel);
-            method.label(loopLabel);
-            body.accept(this);
-            method.label(continueLabel);
+    private void enterForIn(final ForNode forNode) {
+        final Block body   = forNode.getBody();
+        final Node  modify = forNode.getModify();
 
-            if (!body.isTerminal() && modify != null) {
-                load(modify);
-            }
+        final Symbol iter      = forNode.getIterator();
+        final Label  loopLabel = new Label("loop");
 
-            method.label(testLabel);
-            if (test != null) {
-                new BranchOptimizer(this, method).execute(test, loopLabel, true);
-            } else {
-                method._goto(loopLabel);
-            }
+        Node init = forNode.getInit();
 
-            method.label(breakLabel);
+        // We have to evaluate the optional initializer expression
+        // of the iterator variable of the for-in statement.
+        if (init instanceof VarNode) {
+            init.accept(this);
+            init = ((VarNode)init).getName();
         }
 
-        return false;
-    }
+        load(modify);
+        assert modify.getType().isObject();
+        method.invoke(forNode.isForEach() ? ScriptRuntime.TO_VALUE_ITERATOR : ScriptRuntime.TO_PROPERTY_ITERATOR);
+        method.store(iter);
+        method._goto(forNode.getContinueLabel());
+        method.label(loopLabel);
 
-    private static int assignSlots(final Block block, final int firstSlot) {
-        int nextSlot = firstSlot;
-        for (final Symbol symbol : block.getSymbols()) {
-            if (symbol.hasSlot()) {
-                symbol.setSlot(nextSlot);
-                nextSlot += symbol.slotCount();
+        new Store<Node>(init) {
+            @Override
+            protected void storeNonDiscard() {
+                return;
             }
-        }
-        return nextSlot;
+            @Override
+            protected void evaluate() {
+                method.load(iter);
+                method.invoke(interfaceCallNoLookup(Iterator.class, "next", Object.class));
+            }
+        }.store();
+
+        body.accept(this);
+
+        method.label(forNode.getContinueLabel());
+        method.load(iter);
+        method.invoke(interfaceCallNoLookup(Iterator.class, "hasNext", boolean.class));
+        method.ifne(loopLabel);
+        method.label(forNode.getBreakLabel());
     }
 
     /**
@@ -967,24 +871,11 @@ final class CodeGenerator extends NodeOperatorVisitor {
      * @param block block with local vars.
      */
     private void initLocals(final Block block) {
-        final boolean isFunctionBody = getLexicalContext().isFunctionBody();
+        lc.nextFreeSlot(block);
 
-        final int nextFreeSlot;
-        if (isFunctionBody) {
-            // On entry to function, start with slot 0
-            nextFreeSlot = 0;
-        } else {
-            // Otherwise, continue from previous block's first free slot
-            nextFreeSlot = nextFreeSlots[nextFreeSlotsSize - 1];
-        }
-        if(nextFreeSlotsSize == nextFreeSlots.length) {
-            final int[] newNextFreeSlots = new int[nextFreeSlotsSize * 2];
-            System.arraycopy(nextFreeSlots, 0, newNextFreeSlots, 0, nextFreeSlotsSize);
-            nextFreeSlots = newNextFreeSlots;
-        }
-        nextFreeSlots[nextFreeSlotsSize++] = assignSlots(block, nextFreeSlot);
+        final boolean isFunctionBody = lc.isFunctionBody();
 
-        final FunctionNode function = getLexicalContext().getCurrentFunction();
+        final FunctionNode function = lc.getCurrentFunction();
         if (isFunctionBody) {
             /* Fix the predefined slots so they have numbers >= 0, like varargs. */
             if (function.needsParentScope()) {
@@ -1023,7 +914,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
                 }
 
                 if (symbol.isVar()) {
-                    if(varsInScope || symbol.isScope()) {
+                    if (varsInScope || symbol.isScope()) {
                         nameList.add(symbol.getName());
                         newSymbols.add(symbol);
                         values.add(null);
@@ -1062,7 +953,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
 
                 @Override
                 protected void loadScope(MethodEmitter m) {
-                    if(function.needsParentScope()) {
+                    if (function.needsParentScope()) {
                         m.loadCompilerConstant(SCOPE);
                     } else {
                         m.loadNull();
@@ -1096,7 +987,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
 
     private void initArguments(final FunctionNode function) {
         method.loadCompilerConstant(VARARGS);
-        if(function.needsCallee()) {
+        if (function.needsCallee()) {
             method.loadCompilerConstant(CALLEE);
         } else {
             // If function is strict mode, "arguments.callee" is not populated, so we don't necessarily need the
@@ -1126,10 +1017,10 @@ final class CodeGenerator extends NodeOperatorVisitor {
         LOG.info("=== BEGIN ", functionNode.getName());
 
         assert functionNode.getCompileUnit() != null : "no compile unit for " + functionNode.getName() + " " + Debug.id(functionNode);
-        push(functionNode.getCompileUnit());
-        assert !compileUnits.isEmpty();
+        unit = lc.pushCompileUnit(functionNode.getCompileUnit());
+        assert lc.hasCompileUnits();
 
-        pushMethodEmitter(unit.getClassEmitter().method(functionNode));
+        method = lc.pushMethodEmitter(unit.getClassEmitter().method(functionNode));
         // Mark end for variable tables.
         method.begin();
 
@@ -1140,11 +1031,11 @@ final class CodeGenerator extends NodeOperatorVisitor {
     public Node leaveFunctionNode(final FunctionNode functionNode) {
         try {
             method.end(); // wrap up this method
-            pop(functionNode.getCompileUnit());
-            popMethodEmitter(method);
+            unit   = lc.popCompileUnit(functionNode.getCompileUnit());
+            method = lc.popMethodEmitter(method);
             LOG.info("=== END ", functionNode.getName());
 
-            final FunctionNode newFunctionNode = functionNode.setState(getLexicalContext(), CompilationState.EMITTED);
+            final FunctionNode newFunctionNode = functionNode.setState(lc, CompilationState.EMITTED);
 
             newFunctionObject(newFunctionNode, functionNode);
             return newFunctionNode;
@@ -1238,16 +1129,16 @@ final class CodeGenerator extends NodeOperatorVisitor {
             final MethodEmitter savedMethod = method;
 
             for (final ArrayUnit arrayUnit : units) {
-                push(arrayUnit.getCompileUnit());
+                unit = lc.pushCompileUnit(arrayUnit.getCompileUnit());
 
                 final String className = unit.getUnitClassName();
-                final String name      = getLexicalContext().getCurrentFunction().uniqueName(SPLIT_PREFIX.symbolName());
+                final String name      = lc.getCurrentFunction().uniqueName(SPLIT_PREFIX.symbolName());
                 final String signature = methodDescriptor(type, Object.class, ScriptFunction.class, ScriptObject.class, type);
 
                 final MethodEmitter me = unit.getClassEmitter().method(EnumSet.of(Flag.PUBLIC, Flag.STATIC), name, signature);
-                pushMethodEmitter(me);
+                method = lc.pushMethodEmitter(me);
 
-                method.setFunctionNode(getLexicalContext().getCurrentFunction());
+                method.setFunctionNode(lc.getCurrentFunction());
                 method.begin();
 
                 fixScopeSlot();
@@ -1260,7 +1151,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
 
                 method._return();
                 method.end();
-                popMethodEmitter(me);
+                method = lc.popMethodEmitter(me);
 
                 assert method == savedMethod;
                 method.loadCompilerConstant(THIS);
@@ -1271,7 +1162,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
                 method.swap();
                 method.invokestatic(className, name, signature);
 
-                pop(unit);
+                unit = lc.popCompileUnit(unit);
             }
 
             return method;
@@ -1407,7 +1298,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
             return loadRegexToken(regexToken);
         }
         // emit field
-        final String       regexName    = getLexicalContext().getCurrentFunction().uniqueName(REGEX_PREFIX.symbolName());
+        final String       regexName    = lc.getCurrentFunction().uniqueName(REGEX_PREFIX.symbolName());
         final ClassEmitter classEmitter = unit.getClassEmitter();
 
         classEmitter.field(EnumSet.of(PRIVATE, STATIC), regexName, Object.class);
@@ -1545,7 +1436,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
 
         method.registerReturn();
 
-        final Type returnType = getLexicalContext().getCurrentFunction().getReturnType();
+        final Type returnType = lc.getCurrentFunction().getReturnType();
 
         final Node expression = returnNode.getExpression();
         if (expression != null) {
@@ -1756,7 +1647,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
 
         final CompileUnit splitCompileUnit = splitNode.getCompileUnit();
 
-        final FunctionNode fn   = getLexicalContext().getCurrentFunction();
+        final FunctionNode fn   = lc.getCurrentFunction();
         final String className  = splitCompileUnit.getUnitClassName();
         final String name       = splitNode.getName();
 
@@ -1767,7 +1658,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
                 new Class<?>[] {ScriptFunction.class, Object.class, ScriptObject.class};
 
         final MethodEmitter caller = method;
-        push(splitCompileUnit);
+        unit = lc.pushCompileUnit(splitCompileUnit);
 
         final Call splitCall = staticCallNoLookup(
             className,
@@ -1781,8 +1672,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
                         rtype,
                         ptypes);
 
-        pushMethodEmitter(splitEmitter);
-
+        method = lc.pushMethodEmitter(splitEmitter);
         method.setFunctionNode(fn);
 
         if (fn.needsCallee()) {
@@ -1809,7 +1699,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
     }
 
     private void fixScopeSlot() {
-        if (getLexicalContext().getCurrentFunction().compilerConstant(SCOPE).getSlot() != SCOPE.slot()) {
+        if (lc.getCurrentFunction().compilerConstant(SCOPE).getSlot() != SCOPE.slot()) {
             // TODO hack to move the scope to the expected slot (that's needed because split methods reuse the same slots as the root method)
             method.load(Type.typeFor(ScriptObject.class), SCOPE.slot());
             method.storeCompilerConstant(SCOPE);
@@ -1826,15 +1716,15 @@ final class CodeGenerator extends NodeOperatorVisitor {
             // Wrap up this method.
 
             method.loadCompilerConstant(RETURN);
-            method._return(getLexicalContext().getCurrentFunction().getReturnType());
+            method._return(lc.getCurrentFunction().getReturnType());
             method.end();
 
-            pop(splitNode.getCompileUnit());
-            popMethodEmitter(method);
+            unit   = lc.popCompileUnit(splitNode.getCompileUnit());
+            method = lc.popMethodEmitter(method);
 
         } catch (final Throwable t) {
             Context.printStackTrace(t);
-            final VerifyError e = new VerifyError("Code generation bug in \"" + splitNode.getName() + "\": likely stack misaligned: " + t + " " + getLexicalContext().getCurrentFunction().getSource().getName());
+            final VerifyError e = new VerifyError("Code generation bug in \"" + splitNode.getName() + "\": likely stack misaligned: " + t + " " + lc.getCurrentFunction().getSource().getName());
             e.initCause(t);
             throw e;
         }
@@ -1862,7 +1752,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
             //has to be zero
             caller.label(new Label("split_return"));
             method.loadCompilerConstant(RETURN);
-            caller._return(getLexicalContext().getCurrentFunction().getReturnType());
+            caller._return(lc.getCurrentFunction().getReturnType());
             caller.label(breakLabel);
         } else {
             assert !targets.isEmpty();
@@ -1879,14 +1769,14 @@ final class CodeGenerator extends NodeOperatorVisitor {
                 caller.label(labels[i - low]);
                 if (i == 0) {
                     caller.loadCompilerConstant(RETURN);
-                    caller._return(getLexicalContext().getCurrentFunction().getReturnType());
+                    caller._return(lc.getCurrentFunction().getReturnType());
                 } else {
                     // Clear split state.
                     caller.loadCompilerConstant(SCOPE);
                     caller.checkcast(Scope.class);
                     caller.load(-1);
                     caller.invoke(Scope.SET_SPLIT_STATE);
-                    caller.splitAwareGoto(getLexicalContext(), targets.get(i - 1));
+                    caller.splitAwareGoto(lc, targets.get(i - 1));
                 }
             }
             caller.label(breakLabel);
@@ -2028,9 +1918,16 @@ final class CodeGenerator extends NodeOperatorVisitor {
     public boolean enterThrowNode(final ThrowNode throwNode) {
         lineNumber(throwNode);
 
+        if (throwNode.isSyntheticRethrow()) {
+            //do not wrap whatever this is in an ecma exception, just rethrow it
+            load(throwNode.getExpression());
+            method.athrow();
+            return false;
+        }
+
         method._new(ECMAException.class).dup();
 
-        final Source source     = getLexicalContext().getCurrentFunction().getSource();
+        final Source source     = lc.getCurrentFunction().getSource();
 
         final Node   expression = throwNode.getExpression();
         final int    position   = throwNode.position();
@@ -2081,7 +1978,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
             //TODO this is very ugly - try not to call enter/leave methods directly
             //better to use the implicit lexical context scoping given by the visitor's
             //accept method.
-            getLexicalContext().push(catchBlock);
+            lc.push(catchBlock);
             enterBlock(catchBlock);
 
             final CatchNode catchNode          = (CatchNode)catchBlocks.get(i).getStatements().get(0);
@@ -2094,15 +1991,19 @@ final class CodeGenerator extends NodeOperatorVisitor {
                 protected void storeNonDiscard() {
                     return;
                 }
+
                 @Override
                 protected void evaluate() {
+                    if (catchNode.isSyntheticRethrow()) {
+                        method.load(symbol);
+                        return;
+                    }
                     /*
                      * If caught object is an instance of ECMAException, then
                      * bind obj.thrown to the script catch var. Or else bind the
                      * caught object itself to the script catch var.
                      */
                     final Label notEcmaException = new Label("no_ecma_exception");
-
                     method.load(symbol).dup()._instanceof(ECMAException.class).ifeq(notEcmaException);
                     method.checkcast(ECMAException.class); //TODO is this necessary?
                     method.getField(ECMAException.THROWN);
@@ -2137,7 +2038,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
             }
 
             leaveBlock(catchBlock);
-            getLexicalContext().pop(catchBlock);
+            lc.pop(catchBlock);
         }
 
         method.label(skip);
@@ -2234,7 +2135,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
         final boolean hasScope = method.hasScope();
 
         final Label tryLabel;
-        if(hasScope) {
+        if (hasScope) {
             tryLabel = new Label("with_try");
             method.label(tryLabel);
             method.loadCompilerConstant(SCOPE);
@@ -2245,7 +2146,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
         load(expression);
         assert expression.getType().isObject() : "with expression needs to be object: " + expression;
 
-        if(hasScope) {
+        if (hasScope) {
             // Construct a WithObject if we have a scope
             method.invoke(ScriptRuntime.OPEN_WITH);
             method.storeCompilerConstant(SCOPE);
@@ -2285,7 +2186,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
     @Override
     public boolean enterADD(final UnaryNode unaryNode) {
         load(unaryNode.rhs());
-        assert unaryNode.rhs().getType().isNumber();
+        assert unaryNode.rhs().getType().isNumber() : unaryNode.rhs().getType() + " "+ unaryNode.getSymbol();
         method.store(unaryNode.getSymbol());
 
         return false;
@@ -2320,7 +2221,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
                 }
                 method.convert(Type.OBJECT);
             } else if (value instanceof Boolean) {
-                method.getField(staticField(Boolean.class, value.toString().toUpperCase(), Boolean.class));
+                method.getField(staticField(Boolean.class, value.toString().toUpperCase(Locale.ENGLISH), Boolean.class));
             } else {
                 load(rhs);
                 method.convert(unaryNode.getType());
@@ -2387,13 +2288,13 @@ final class CodeGenerator extends NodeOperatorVisitor {
     public boolean enterDISCARD(final UnaryNode unaryNode) {
         final Node rhs = unaryNode.rhs();
 
-        discard.push(rhs);
+        lc.pushDiscard(rhs);
         load(rhs);
 
-        if (discard.peek() == rhs) {
+        if (lc.getCurrentDiscard() == rhs) {
             assert !rhs.isAssignment();
             method.pop();
-            discard.pop();
+            lc.popDiscard();
         }
 
         return false;
@@ -2445,7 +2346,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
         assert lhs.getType().equals(rhs.getType()) && lhs.getType().equals(type) : lhs.getType() + " != " + rhs.getType() + " != " + type + " " + new ASTWriter(lhs) + " " + new ASTWriter(rhs);
         load(lhs);
         load(rhs);
-        method.add();
+        method.add(); //if the symbol is optimistic, it always needs to be written, not on the stack?
         method.store(symbol);
         return null;
     }
@@ -2989,53 +2890,12 @@ final class CodeGenerator extends NodeOperatorVisitor {
      * Generate all shared scope calls generated during codegen.
      */
     protected void generateScopeCalls() {
-        for (final SharedScopeCall scopeAccess : scopeCalls.values()) {
+        for (final SharedScopeCall scopeAccess : lc.getScopeCalls()) {
             scopeAccess.generateScopeCall();
         }
     }
 
     /**
-     * Get a shared static method representing a dynamic scope callsite.
-     *
-     * @param symbol the symbol
-     * @param valueType the value type of the symbol
-     * @param returnType the return type
-     * @param paramTypes the parameter types
-     * @param flags the callsite flags
-     * @return an object representing a shared scope call
-     */
-    private SharedScopeCall getScopeCall(final Symbol symbol, final Type valueType, final Type returnType,
-                                         final Type[] paramTypes, final int flags) {
-
-        final SharedScopeCall scopeCall = new SharedScopeCall(symbol, valueType, returnType, paramTypes, flags);
-        if (scopeCalls.containsKey(scopeCall)) {
-            return scopeCalls.get(scopeCall);
-        }
-        scopeCall.setClassAndName(unit, getLexicalContext().getCurrentFunction().uniqueName("scopeCall"));
-        scopeCalls.put(scopeCall, scopeCall);
-        return scopeCall;
-    }
-
-    /**
-     * Get a shared static method representing a dynamic scope get access.
-     *
-     * @param type the type of the variable
-     * @param symbol the symbol
-     * @param flags the callsite flags
-     * @return an object representing a shared scope call
-     */
-    private SharedScopeCall getScopeGet(final Type type, final Symbol symbol, final int flags) {
-
-        final SharedScopeCall scopeCall = new SharedScopeCall(symbol, type, type, null, flags);
-        if (scopeCalls.containsKey(scopeCall)) {
-            return scopeCalls.get(scopeCall);
-        }
-        scopeCall.setClassAndName(unit, getLexicalContext().getCurrentFunction().uniqueName("scopeCall"));
-        scopeCalls.put(scopeCall, scopeCall);
-        return scopeCall;
-    }
-
-    /**
      * Debug code used to print symbols
      *
      * @param block the block we are in
@@ -3129,14 +2989,14 @@ final class CodeGenerator extends NodeOperatorVisitor {
 
         private void prologue() {
             final Symbol targetSymbol = target.getSymbol();
-            final Symbol scopeSymbol  = getLexicalContext().getCurrentFunction().compilerConstant(SCOPE);
+            final Symbol scopeSymbol  = lc.getCurrentFunction().compilerConstant(SCOPE);
 
             /**
              * This loads the parts of the target, e.g base and index. they are kept
              * on the stack throughout the store and used at the end to execute it
              */
 
-            target.accept(new NodeVisitor() {
+            target.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
                 @Override
                 public boolean enterIdentNode(final IdentNode node) {
                     if (targetSymbol.isScope()) {
@@ -3203,22 +3063,21 @@ final class CodeGenerator extends NodeOperatorVisitor {
          * @return the quick symbol
          */
         private Symbol quickSymbol(final Type type, final String prefix) {
-            final String name = getLexicalContext().getCurrentFunction().uniqueName(prefix);
+            final String name = lc.getCurrentFunction().uniqueName(prefix);
             final Symbol symbol = new Symbol(name, IS_TEMP | IS_INTERNAL);
 
             symbol.setType(type);
-            final int quickSlot = nextFreeSlots[nextFreeSlotsSize - 1];
-            nextFreeSlots[nextFreeSlotsSize - 1] = quickSlot + symbol.slotCount();
-            symbol.setSlot(quickSlot);
+
+            symbol.setSlot(lc.quickSlot(symbol));
 
             return symbol;
         }
 
         // store the result that "lives on" after the op, e.g. "i" in i++ postfix.
         protected void storeNonDiscard() {
-            if (discard.peek() == assignNode) {
+            if (lc.getCurrentDiscard() == assignNode) {
                 assert assignNode.isAssignment();
-                discard.pop();
+                lc.popDiscard();
                 return;
             }
 
@@ -3246,7 +3105,7 @@ final class CodeGenerator extends NodeOperatorVisitor {
              */
             method.convert(target.getType());
 
-            target.accept(new NodeVisitor() {
+            target.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
                 @Override
                 protected boolean enterDefault(Node node) {
                     throw new AssertionError("Unexpected node " + node + " in store epilogue");
@@ -3308,7 +3167,6 @@ final class CodeGenerator extends NodeOperatorVisitor {
     }
 
     private void newFunctionObject(final FunctionNode functionNode, final FunctionNode originalFunctionNode) {
-        final LexicalContext lc = getLexicalContext();
         assert lc.peek() == functionNode;
         // We don't emit a ScriptFunction on stack for:
         // 1. the outermost compiled function (as there's no code being generated in its outer context that'd need it
diff --git a/src/jdk/nashorn/internal/codegen/CodeGeneratorLexicalContext.java b/src/jdk/nashorn/internal/codegen/CodeGeneratorLexicalContext.java
new file mode 100644
index 00000000..d27bdd95
--- /dev/null
+++ b/src/jdk/nashorn/internal/codegen/CodeGeneratorLexicalContext.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.nashorn.internal.codegen;
+
+import java.util.ArrayDeque;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.Map;
+
+import jdk.nashorn.internal.codegen.types.Type;
+import jdk.nashorn.internal.ir.Block;
+import jdk.nashorn.internal.ir.FunctionNode;
+import jdk.nashorn.internal.ir.LexicalContext;
+import jdk.nashorn.internal.ir.LexicalContextNode;
+import jdk.nashorn.internal.ir.Node;
+import jdk.nashorn.internal.ir.Symbol;
+import jdk.nashorn.internal.ir.WithNode;
+
+/**
+ * A lexical context that also tracks if we have any dynamic scopes in the context. Such scopes can have new
+ * variables introduced into them at run time - a with block or a function directly containing an eval call.
+ * Furthermore, this class keeps track of current discard state, which the current method emitter being used is,
+ * the current compile unit, and local variable indexes
+ */
+final class CodeGeneratorLexicalContext extends LexicalContext {
+    private int dynamicScopeCount;
+
+    /** Map of shared scope call sites */
+    private final Map<SharedScopeCall, SharedScopeCall> scopeCalls = new HashMap<>();
+
+    /** Compile unit stack - every time we start a sub method (e.g. a split) we push one */
+    private final Deque<CompileUnit> compileUnits = new ArrayDeque<>();
+
+    /** Method emitter stack - every time we start a sub method (e.g. a split) we push one */
+    private final Deque<MethodEmitter> methodEmitters = new ArrayDeque<>();
+
+    /** The discard stack - whenever we enter a discard node we keep track of its return value status -
+     *  i.e. should we keep it or throw it away */
+    private final Deque<Node> discard = new ArrayDeque<>();
+
+    /** A stack tracking the next free local variable slot in the blocks. There's one entry for every block
+     *  currently on the lexical context stack. */
+    private int[] nextFreeSlots = new int[16];
+
+    /** size of next free slot vector */
+    private int nextFreeSlotsSize;
+
+    @Override
+    public <T extends LexicalContextNode> T push(final T node) {
+        if (isDynamicScopeBoundary(node)) {
+            ++dynamicScopeCount;
+        }
+        return super.push(node);
+    }
+
+    @Override
+    public <T extends LexicalContextNode> T pop(final T node) {
+        final T popped = super.pop(node);
+        if (isDynamicScopeBoundary(popped)) {
+            --dynamicScopeCount;
+        }
+        if (node instanceof Block) {
+            --nextFreeSlotsSize;
+        }
+        return popped;
+    }
+
+    private boolean isDynamicScopeBoundary(final LexicalContextNode node) {
+        if (node instanceof Block) {
+            // Block's immediate parent is a with node. Note we aren't testing for a WithNode, as that'd capture
+            // processing of WithNode.expression too, but it should be unaffected.
+            return !isEmpty() && peek() instanceof WithNode;
+        } else if (node instanceof FunctionNode) {
+            // Function has a direct eval in it (so a top-level "var ..." in the eval code can introduce a new
+            // variable into the function's scope), and it isn't strict (as evals in strict functions get an
+            // isolated scope).
+            return isFunctionDynamicScope((FunctionNode)node);
+        }
+        return false;
+    }
+
+    boolean inDynamicScope() {
+        return dynamicScopeCount > 0;
+    }
+
+    static boolean isFunctionDynamicScope(FunctionNode fn) {
+        return fn.hasEval() && !fn.isStrict();
+    }
+
+    MethodEmitter pushMethodEmitter(final MethodEmitter newMethod) {
+        methodEmitters.push(newMethod);
+        return newMethod;
+    }
+
+    MethodEmitter popMethodEmitter(final MethodEmitter oldMethod) {
+        assert methodEmitters.peek() == oldMethod;
+        methodEmitters.pop();
+        return methodEmitters.isEmpty() ? null : methodEmitters.peek();
+    }
+
+    CompileUnit pushCompileUnit(final CompileUnit newUnit) {
+        compileUnits.push(newUnit);
+        return newUnit;
+    }
+
+    CompileUnit popCompileUnit(final CompileUnit oldUnit) {
+        assert compileUnits.peek() == oldUnit;
+        compileUnits.pop();
+        return compileUnits.isEmpty() ? null : compileUnits.peek();
+    }
+
+    boolean hasCompileUnits() {
+        return !compileUnits.isEmpty();
+    }
+
+    Collection<SharedScopeCall> getScopeCalls() {
+        return Collections.unmodifiableCollection(scopeCalls.values());
+    }
+
+    /**
+     * Get a shared static method representing a dynamic scope callsite.
+     *
+     * @param unit current compile unit
+     * @param symbol the symbol
+     * @param valueType the value type of the symbol
+     * @param returnType the return type
+     * @param paramTypes the parameter types
+     * @param flags the callsite flags
+     * @return an object representing a shared scope call
+     */
+    SharedScopeCall getScopeCall(final CompileUnit unit, final Symbol symbol, final Type valueType, final Type returnType, final Type[] paramTypes, final int flags) {
+        final SharedScopeCall scopeCall = new SharedScopeCall(symbol, valueType, returnType, paramTypes, flags);
+        if (scopeCalls.containsKey(scopeCall)) {
+            return scopeCalls.get(scopeCall);
+        }
+        scopeCall.setClassAndName(unit, getCurrentFunction().uniqueName("scopeCall"));
+        scopeCalls.put(scopeCall, scopeCall);
+        return scopeCall;
+    }
+
+    /**
+     * Get a shared static method representing a dynamic scope get access.
+     *
+     * @param unit current compile unit
+     * @param type the type of the variable
+     * @param symbol the symbol
+     * @param flags the callsite flags
+     * @return an object representing a shared scope call
+     */
+    SharedScopeCall getScopeGet(final CompileUnit unit, final Type type, final Symbol symbol, final int flags) {
+        final SharedScopeCall scopeCall = new SharedScopeCall(symbol, type, type, null, flags);
+        if (scopeCalls.containsKey(scopeCall)) {
+            return scopeCalls.get(scopeCall);
+        }
+        scopeCall.setClassAndName(unit, getCurrentFunction().uniqueName("scopeCall"));
+        scopeCalls.put(scopeCall, scopeCall);
+        return scopeCall;
+    }
+
+
+    void nextFreeSlot(final Block block) {
+        final boolean isFunctionBody = isFunctionBody();
+
+        final int nextFreeSlot;
+        if (isFunctionBody) {
+            // On entry to function, start with slot 0
+            nextFreeSlot = 0;
+        } else {
+            // Otherwise, continue from previous block's first free slot
+            nextFreeSlot = nextFreeSlots[nextFreeSlotsSize - 1];
+        }
+        if (nextFreeSlotsSize == nextFreeSlots.length) {
+            final int[] newNextFreeSlots = new int[nextFreeSlotsSize * 2];
+            System.arraycopy(nextFreeSlots, 0, newNextFreeSlots, 0, nextFreeSlotsSize);
+            nextFreeSlots = newNextFreeSlots;
+        }
+        nextFreeSlots[nextFreeSlotsSize++] = assignSlots(block, nextFreeSlot);
+    }
+
+    private static int assignSlots(final Block block, final int firstSlot) {
+        int nextSlot = firstSlot;
+        for (final Symbol symbol : block.getSymbols()) {
+            if (symbol.hasSlot()) {
+                symbol.setSlot(nextSlot);
+                nextSlot += symbol.slotCount();
+            }
+        }
+        return nextSlot;
+    }
+
+    void pushDiscard(final Node node) {
+        discard.push(node);
+    }
+
+    Node popDiscard() {
+        return discard.pop();
+    }
+
+    Node getCurrentDiscard() {
+        return discard.peek();
+    }
+
+    int quickSlot(final Symbol symbol) {
+        final int quickSlot = nextFreeSlots[nextFreeSlotsSize - 1];
+        nextFreeSlots[nextFreeSlotsSize - 1] = quickSlot + symbol.slotCount();
+        return quickSlot;
+    }
+
+}
+
diff --git a/src/jdk/nashorn/internal/codegen/CompilationPhase.java b/src/jdk/nashorn/internal/codegen/CompilationPhase.java
index bfc71cc2..9f263067 100644
--- a/src/jdk/nashorn/internal/codegen/CompilationPhase.java
+++ b/src/jdk/nashorn/internal/codegen/CompilationPhase.java
@@ -11,20 +11,27 @@ import static jdk.nashorn.internal.ir.FunctionNode.CompilationState.SPLIT;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Deque;
 import java.util.EnumSet;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
+
+import jdk.nashorn.internal.codegen.types.Range;
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.Block;
 import jdk.nashorn.internal.ir.CallNode;
 import jdk.nashorn.internal.ir.FunctionNode;
-import jdk.nashorn.internal.ir.FunctionNode.CompilationState;
 import jdk.nashorn.internal.ir.LexicalContext;
+import jdk.nashorn.internal.ir.ReturnNode;
+import jdk.nashorn.internal.ir.Symbol;
+import jdk.nashorn.internal.ir.FunctionNode.CompilationState;
 import jdk.nashorn.internal.ir.Node;
 import jdk.nashorn.internal.ir.TemporarySymbols;
 import jdk.nashorn.internal.ir.debug.ASTWriter;
 import jdk.nashorn.internal.ir.debug.PrintVisitor;
-import jdk.nashorn.internal.ir.visitor.NodeOperatorVisitor;
 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
 import jdk.nashorn.internal.runtime.ECMAErrors;
 import jdk.nashorn.internal.runtime.ScriptEnvironment;
@@ -66,7 +73,7 @@ enum CompilationPhase {
 
             FunctionNode newFunctionNode = outermostFunctionNode;
 
-            newFunctionNode = (FunctionNode)newFunctionNode.accept(new NodeVisitor() {
+            newFunctionNode = (FunctionNode)newFunctionNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
                 // self references are done with invokestatic and thus cannot
                 // have trampolines - never lazy
                 @Override
@@ -99,10 +106,9 @@ enum CompilationPhase {
                 lazy.remove(node);
             }
 
-            newFunctionNode = (FunctionNode)newFunctionNode.accept(new NodeOperatorVisitor() {
+            newFunctionNode = (FunctionNode)newFunctionNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
                 @Override
                 public Node leaveFunctionNode(final FunctionNode functionNode) {
-                    final LexicalContext lc = getLexicalContext();
                     if (lazy.contains(functionNode)) {
                         Compiler.LOG.fine(
                                 "Marking ",
@@ -174,7 +180,7 @@ enum CompilationPhase {
         FunctionNode transform(final Compiler compiler, final FunctionNode fn) {
             final TemporarySymbols ts = compiler.getTemporarySymbols();
             final FunctionNode newFunctionNode = (FunctionNode)enterAttr(fn, ts).accept(new Attr(ts));
-            if(compiler.getEnv()._print_mem_usage) {
+            if (compiler.getEnv()._print_mem_usage) {
                 Compiler.LOG.info("Attr temporary symbol count: " + ts.getTotalSymbolCount());
             }
             return newFunctionNode;
@@ -186,12 +192,11 @@ enum CompilationPhase {
          * @param functionNode node where to start iterating
          */
         private FunctionNode enterAttr(final FunctionNode functionNode, final TemporarySymbols ts) {
-            return (FunctionNode)functionNode.accept(new NodeVisitor() {
+            return (FunctionNode)functionNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
                 @Override
                 public Node leaveFunctionNode(final FunctionNode node) {
-                    final LexicalContext lc = getLexicalContext();
                     if (node.isLazy()) {
-                        FunctionNode newNode = node.setReturnType(getLexicalContext(), Type.OBJECT);
+                        FunctionNode newNode = node.setReturnType(lc, Type.OBJECT);
                         return ts.ensureSymbol(lc, Type.OBJECT, newNode);
                     }
                     //node may have a reference here that needs to be nulled if it was referred to by
@@ -208,6 +213,89 @@ enum CompilationPhase {
     },
 
     /*
+     * Range analysis
+     *    Conservatively prove that certain variables can be narrower than
+     *    the most generic number type
+     */
+    RANGE_ANALYSIS_PHASE(EnumSet.of(INITIALIZED, PARSED, CONSTANT_FOLDED, LOWERED, ATTR)) {
+        @Override
+        FunctionNode transform(final Compiler compiler, final FunctionNode fn) {
+            if (!compiler.getEnv()._range_analysis) {
+                return fn;
+            }
+
+            FunctionNode newFunctionNode = (FunctionNode)fn.accept(new RangeAnalyzer());
+            final List<ReturnNode> returns = new ArrayList<>();
+
+            newFunctionNode = (FunctionNode)newFunctionNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
+                private final Deque<ArrayList<ReturnNode>> returnStack = new ArrayDeque<>();
+
+                @Override
+                public boolean enterFunctionNode(final FunctionNode functionNode) {
+                    returnStack.push(new ArrayList<ReturnNode>());
+                    return true;
+                }
+
+                @Override
+                public Node leaveFunctionNode(final FunctionNode functionNode) {
+                    Type returnType = Type.UNKNOWN;
+                    for (final ReturnNode ret : returnStack.pop()) {
+                        if (ret.getExpression() == null) {
+                            returnType = Type.OBJECT;
+                            break;
+                        }
+                        returnType = Type.widest(returnType, ret.getExpression().getType());
+                    }
+                    return functionNode.setReturnType(lc, returnType);
+                }
+
+                @Override
+                public Node leaveReturnNode(final ReturnNode returnNode) {
+                    final ReturnNode result = (ReturnNode)leaveDefault(returnNode);
+                    returns.add(result);
+                    return result;
+                }
+
+                @Override
+                public Node leaveDefault(final Node node) {
+                    final Symbol symbol = node.getSymbol();
+                    if (symbol != null) {
+                        final Range range  = symbol.getRange();
+                        final Type  symbolType = symbol.getSymbolType();
+                        if (!symbolType.isNumeric()) {
+                            return node;
+                        }
+                        final Type  rangeType  = range.getType();
+                        if (!Type.areEquivalent(symbolType, rangeType) && Type.widest(symbolType, rangeType) == symbolType) { //we can narrow range
+                            RangeAnalyzer.LOG.info("[", lc.getCurrentFunction().getName(), "] ", symbol, " can be ", range.getType(), " ", symbol.getRange());
+                            return node.setSymbol(lc, symbol.setTypeOverrideShared(range.getType(), compiler.getTemporarySymbols()));
+                        }
+                    }
+                    return node;
+                }
+            });
+
+            Type returnType = Type.UNKNOWN;
+            for (final ReturnNode node : returns) {
+                if (node.getExpression() != null) {
+                    returnType = Type.widest(returnType, node.getExpression().getType());
+                } else {
+                    returnType = Type.OBJECT;
+                    break;
+                }
+            }
+
+            return newFunctionNode.setReturnType(null, returnType);
+        }
+
+        @Override
+        public String toString() {
+            return "[Range Analysis]";
+        }
+    },
+
+
+    /*
      * Splitter Split the AST into several compile units based on a size
      * heuristic Splitter needs attributed AST for weight calculations (e.g. is
      * a + b a ScriptRuntime.ADD with call overhead or a dadd with much less).
@@ -218,7 +306,6 @@ enum CompilationPhase {
         FunctionNode transform(final Compiler compiler, final FunctionNode fn) {
             final CompileUnit outermostCompileUnit = compiler.addCompileUnit(compiler.firstCompileUnitName());
 
-//            assert fn.isProgram() ;
             final FunctionNode newFunctionNode = new Splitter(compiler, fn, outermostCompileUnit).split(fn);
 
             assert newFunctionNode.getCompileUnit() == outermostCompileUnit : "fn.compileUnit (" + newFunctionNode.getCompileUnit() + ") != " + outermostCompileUnit;
diff --git a/src/jdk/nashorn/internal/codegen/Compiler.java b/src/jdk/nashorn/internal/codegen/Compiler.java
index 81a76186..faf7a3c5 100644
--- a/src/jdk/nashorn/internal/codegen/Compiler.java
+++ b/src/jdk/nashorn/internal/codegen/Compiler.java
@@ -99,7 +99,7 @@ public final class Compiler {
 
     private boolean strict;
 
-    private CodeInstaller<ScriptEnvironment> installer;
+    private final CodeInstaller<ScriptEnvironment> installer;
 
     private final TemporarySymbols temporarySymbols = new TemporarySymbols();
 
@@ -219,6 +219,7 @@ public final class Compiler {
         CompilationPhase.CONSTANT_FOLDING_PHASE,
         CompilationPhase.LOWERING_PHASE,
         CompilationPhase.ATTRIBUTION_PHASE,
+        CompilationPhase.RANGE_ANALYSIS_PHASE,
         CompilationPhase.SPLITTING_PHASE,
         CompilationPhase.TYPE_FINALIZATION_PHASE,
         CompilationPhase.BYTECODE_GENERATION_PHASE);
@@ -384,6 +385,8 @@ public final class Compiler {
         if (info) {
             final StringBuilder sb = new StringBuilder();
             sb.append("Compile job for '").
+                append(newFunctionNode.getSource()).
+                append(':').
                 append(newFunctionNode.getName()).
                 append("' finished");
 
@@ -487,7 +490,7 @@ public final class Compiler {
         }
 
         if (sb != null) {
-            LOG.info(sb);
+            LOG.fine(sb);
         }
 
         return rootClass;
diff --git a/src/jdk/nashorn/internal/codegen/CompilerConstants.java b/src/jdk/nashorn/internal/codegen/CompilerConstants.java
index 6912534d..d9c68ad8 100644
--- a/src/jdk/nashorn/internal/codegen/CompilerConstants.java
+++ b/src/jdk/nashorn/internal/codegen/CompilerConstants.java
@@ -262,7 +262,7 @@ public enum CompilerConstants {
      * @return the internal descriptor for this type
      */
     public static String typeDescriptor(final Class<?> clazz) {
-        return Type.getDescriptor(clazz);
+        return Type.typeFor(clazz).getDescriptor();
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/codegen/FinalizeTypes.java b/src/jdk/nashorn/internal/codegen/FinalizeTypes.java
index e94dab7c..f9d64322 100644
--- a/src/jdk/nashorn/internal/codegen/FinalizeTypes.java
+++ b/src/jdk/nashorn/internal/codegen/FinalizeTypes.java
@@ -31,6 +31,7 @@ import static jdk.nashorn.internal.codegen.CompilerConstants.SCOPE;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
+
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.AccessNode;
 import jdk.nashorn.internal.ir.Assignment;
@@ -84,13 +85,14 @@ import jdk.nashorn.internal.runtime.JSType;
  * and frame optimizations
  */
 
-final class FinalizeTypes extends NodeOperatorVisitor {
+final class FinalizeTypes extends NodeOperatorVisitor<LexicalContext> {
 
     private static final DebugLogger LOG = new DebugLogger("finalize");
 
     private final TemporarySymbols temporarySymbols;
 
     FinalizeTypes(final TemporarySymbols temporarySymbols) {
+        super(new LexicalContext());
         this.temporarySymbols = temporarySymbols;
     }
 
@@ -233,7 +235,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
 
     private boolean symbolIsInteger(Node node) {
         final Symbol symbol = node.getSymbol();
-        assert symbol != null && symbol.getSymbolType().isInteger() : "int coercion expected: " + Debug.id(symbol) + " " + symbol + " " + getLexicalContext().getCurrentFunction().getSource();
+        assert symbol != null && symbol.getSymbolType().isInteger() : "int coercion expected: " + Debug.id(symbol) + " " + symbol + " " + lc.getCurrentFunction().getSource();
         return true;
     }
 
@@ -382,12 +384,10 @@ final class FinalizeTypes extends NodeOperatorVisitor {
         final Node test   = forNode.getTest();
         final Node modify = forNode.getModify();
 
-        final LexicalContext lc = getLexicalContext();
-
         if (forNode.isForIn()) {
             return forNode.setModify(lc, convert(forNode.getModify(), Type.OBJECT)); // NASHORN-400
         }
-        assert test != null || forNode.hasGoto() : "forNode " + forNode + " needs goto and is missing it in " + getLexicalContext().getCurrentFunction();
+        assert test != null || forNode.hasGoto() : "forNode " + forNode + " needs goto and is missing it in " + lc.getCurrentFunction();
 
         return forNode.
             setInit(lc, init == null ? null : discard(init)).
@@ -419,7 +419,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
 
     @Override
     public Node leaveFunctionNode(final FunctionNode functionNode) {
-        return functionNode.setState(getLexicalContext(), CompilationState.FINALIZED);
+        return functionNode.setState(lc, CompilationState.FINALIZED);
     }
 
     @Override
@@ -450,7 +450,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
     public Node leaveReturnNode(final ReturnNode returnNode) {
         final Node expr = returnNode.getExpression();
         if (expr != null) {
-            return returnNode.setExpression(convert(expr, getLexicalContext().getCurrentFunction().getReturnType()));
+            return returnNode.setExpression(convert(expr, lc.getCurrentFunction().getReturnType()));
         }
         return returnNode;
     }
@@ -482,8 +482,8 @@ final class FinalizeTypes extends NodeOperatorVisitor {
         }
 
         return switchNode.
-            setExpression(getLexicalContext(), convert(expression, Type.OBJECT)).
-            setCases(getLexicalContext(), newCases);
+            setExpression(lc, convert(expression, Type.OBJECT)).
+            setCases(lc, newCases);
     }
 
     @Override
@@ -519,14 +519,14 @@ final class FinalizeTypes extends NodeOperatorVisitor {
     public Node leaveWhileNode(final WhileNode whileNode) {
         final Node test = whileNode.getTest();
         if (test != null) {
-            return whileNode.setTest(getLexicalContext(), convert(test, Type.BOOLEAN));
+            return whileNode.setTest(lc, convert(test, Type.BOOLEAN));
         }
         return whileNode;
     }
 
     @Override
     public Node leaveWithNode(final WithNode withNode) {
-        return withNode.setExpression(getLexicalContext(), convert(withNode.getExpression(), Type.OBJECT));
+        return withNode.setExpression(lc, convert(withNode.getExpression(), Type.OBJECT));
     }
 
     private static void updateSymbolsLog(final FunctionNode functionNode, final Symbol symbol, final boolean loseSlot) {
@@ -550,7 +550,6 @@ final class FinalizeTypes extends NodeOperatorVisitor {
             return; // nothing to do
         }
 
-        final LexicalContext lc             = getLexicalContext();
         final FunctionNode   functionNode   = lc.getFunction(block);
         final boolean        allVarsInScope = functionNode.allVarsInScope();
         final boolean        isVarArg       = functionNode.isVarArg();
@@ -652,7 +651,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
     private static void setCanBePrimitive(final Node node, final Type to) {
         final HashSet<Node> exclude = new HashSet<>();
 
-        node.accept(new NodeVisitor() {
+        node.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             private void setCanBePrimitive(final Symbol symbol) {
                 LOG.info("*** can be primitive symbol ", symbol, " ", Debug.id(symbol));
                 symbol.setCanBePrimitive(to);
@@ -762,7 +761,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
             }
         }
         LOG.info("Type override for lhs in '", node, "' => ", to);
-        return ((TypeOverride<T>)node).setType(temporarySymbols, getLexicalContext(), to);
+        return ((TypeOverride<T>)node).setType(temporarySymbols, lc, to);
     }
 
     /**
@@ -785,8 +784,8 @@ final class FinalizeTypes extends NodeOperatorVisitor {
     private Node convert(final Node node, final Type to) {
         assert !to.isUnknown() : "unknown type for " + node + " class=" + node.getClass();
         assert node != null : "node is null";
-        assert node.getSymbol() != null : "node " + node + " " + node.getClass() + " has no symbol! " + getLexicalContext().getCurrentFunction();
-        assert node.tokenType() != TokenType.CONVERT : "assert convert in convert " + node + " in " + getLexicalContext().getCurrentFunction();
+        assert node.getSymbol() != null : "node " + node + " " + node.getClass() + " has no symbol! " + lc.getCurrentFunction();
+        assert node.tokenType() != TokenType.CONVERT : "assert convert in convert " + node + " in " + lc.getCurrentFunction();
 
         final Type from = node.getType();
 
@@ -800,7 +799,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
 
         Node resultNode = node;
 
-        if (node instanceof LiteralNode && !to.isObject()) {
+        if (node instanceof LiteralNode && !(node instanceof ArrayLiteralNode) && !to.isObject()) {
             final LiteralNode<?> newNode = new LiteralNodeConstantEvaluator((LiteralNode<?>)node, to).eval();
             if (newNode != null) {
                 resultNode = newNode;
@@ -817,7 +816,6 @@ final class FinalizeTypes extends NodeOperatorVisitor {
 
         assert !node.isTerminal();
 
-        final LexicalContext lc = getLexicalContext();
         //This is the only place in this file that can create new temporaries
         //FinalizeTypes may not introduce ANY node that is not a conversion.
         return temporarySymbols.ensureSymbol(lc, to, resultNode);
@@ -854,7 +852,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
             symbol = symbol.setTypeOverrideShared(to, temporarySymbols);
             LOG.info("Type override for temporary in '", node, "' => ", to);
         }
-        return node.setSymbol(getLexicalContext(), symbol);
+        return node.setSymbol(lc, symbol);
     }
 
     /**
@@ -907,7 +905,7 @@ final class FinalizeTypes extends NodeOperatorVisitor {
 
             if (literalNode != null) {
                 //inherit literal symbol for attr.
-                literalNode = (LiteralNode<?>)literalNode.setSymbol(getLexicalContext(), parent.getSymbol());
+                literalNode = (LiteralNode<?>)literalNode.setSymbol(lc, parent.getSymbol());
             }
 
             return literalNode;
diff --git a/src/jdk/nashorn/internal/codegen/FoldConstants.java b/src/jdk/nashorn/internal/codegen/FoldConstants.java
index 686c9836..2331cf75 100644
--- a/src/jdk/nashorn/internal/codegen/FoldConstants.java
+++ b/src/jdk/nashorn/internal/codegen/FoldConstants.java
@@ -33,7 +33,9 @@ import jdk.nashorn.internal.ir.ExecuteNode;
 import jdk.nashorn.internal.ir.FunctionNode;
 import jdk.nashorn.internal.ir.FunctionNode.CompilationState;
 import jdk.nashorn.internal.ir.IfNode;
+import jdk.nashorn.internal.ir.LexicalContext;
 import jdk.nashorn.internal.ir.LiteralNode;
+import jdk.nashorn.internal.ir.LiteralNode.ArrayLiteralNode;
 import jdk.nashorn.internal.ir.Node;
 import jdk.nashorn.internal.ir.TernaryNode;
 import jdk.nashorn.internal.ir.UnaryNode;
@@ -45,11 +47,12 @@ import jdk.nashorn.internal.runtime.ScriptRuntime;
 /**
  * Simple constant folding pass, executed before IR is starting to be lowered.
  */
-final class FoldConstants extends NodeVisitor {
+final class FoldConstants extends NodeVisitor<LexicalContext> {
 
     private static final DebugLogger LOG = new DebugLogger("fold");
 
     FoldConstants() {
+        super(new LexicalContext());
     }
 
     @Override
@@ -79,7 +82,7 @@ final class FoldConstants extends NodeVisitor {
 
     @Override
     public Node leaveFunctionNode(final FunctionNode functionNode) {
-        return functionNode.setState(getLexicalContext(), CompilationState.CONSTANT_FOLDED);
+        return functionNode.setState(lc, CompilationState.CONSTANT_FOLDED);
     }
 
     @Override
@@ -141,6 +144,10 @@ final class FoldConstants extends NodeVisitor {
                 return null;
             }
 
+            if (rhsNode instanceof ArrayLiteralNode) {
+                return null;
+            }
+
             final LiteralNode<?> rhs = (LiteralNode<?>)rhsNode;
             final boolean rhsInteger = rhs.getType().isInteger();
 
@@ -212,6 +219,10 @@ final class FoldConstants extends NodeVisitor {
             final LiteralNode<?> lhs = (LiteralNode<?>)parent.lhs();
             final LiteralNode<?> rhs = (LiteralNode<?>)parent.rhs();
 
+            if (lhs instanceof ArrayLiteralNode || rhs instanceof ArrayLiteralNode) {
+                return null;
+            }
+
             final Type widest = Type.widest(lhs.getType(), rhs.getType());
 
             boolean isInteger = widest.isInteger();
@@ -279,9 +290,9 @@ final class FoldConstants extends NodeVisitor {
             isLong    &= value != 0.0 && JSType.isRepresentableAsLong(value);
 
             if (isInteger) {
-                return LiteralNode.newInstance(token, finish, JSType.toInt32(value));
+                return LiteralNode.newInstance(token, finish, (int)value);
             } else if (isLong) {
-                return LiteralNode.newInstance(token, finish, JSType.toLong(value));
+                return LiteralNode.newInstance(token, finish, (long)value);
             }
 
             return LiteralNode.newInstance(token, finish, value);
diff --git a/src/jdk/nashorn/internal/codegen/Lower.java b/src/jdk/nashorn/internal/codegen/Lower.java
index 23e91b63..2747560a 100644
--- a/src/jdk/nashorn/internal/codegen/Lower.java
+++ b/src/jdk/nashorn/internal/codegen/Lower.java
@@ -80,7 +80,7 @@ import jdk.nashorn.internal.runtime.Source;
  * finalized.
  */
 
-final class Lower extends NodeOperatorVisitor {
+final class Lower extends NodeOperatorVisitor<BlockLexicalContext> {
 
     private static final DebugLogger LOG = new DebugLogger("lower");
 
@@ -105,7 +105,7 @@ final class Lower extends NodeOperatorVisitor {
                             terminated = true;
                         }
                     } else {
-                        statement.accept(new NodeVisitor() {
+                        statement.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
                             @Override
                             public boolean enterVarNode(final VarNode varNode) {
                                 newStatements.add(varNode.setInit(null));
@@ -121,7 +121,6 @@ final class Lower extends NodeOperatorVisitor {
 
     @Override
     public boolean enterBlock(final Block block) {
-        final LexicalContext lc = getLexicalContext();
         final FunctionNode   function = lc.getCurrentFunction();
         if (lc.isFunctionBody() && function.isProgram() && !function.hasDeclaredFunctions()) {
             new ExecuteNode(block.getLineNumber(), block.getToken(), block.getFinish(), LiteralNode.newInstance(block, ScriptRuntime.UNDEFINED)).accept(this);
@@ -134,12 +133,10 @@ final class Lower extends NodeOperatorVisitor {
         //now we have committed the entire statement list to the block, but we need to truncate
         //whatever is after the last terminal. block append won't append past it
 
-        final BlockLexicalContext lc = (BlockLexicalContext)getLexicalContext();
-
         Statement last = lc.getLastStatement();
 
         if (lc.isFunctionBody()) {
-            final FunctionNode currentFunction = getLexicalContext().getCurrentFunction();
+            final FunctionNode currentFunction = lc.getCurrentFunction();
             final boolean isProgram = currentFunction.isProgram();
             final ReturnNode returnNode = new ReturnNode(
                 last == null ? block.getLineNumber() : last.getLineNumber(), //TODO?
@@ -191,7 +188,7 @@ final class Lower extends NodeOperatorVisitor {
         final Node expr = executeNode.getExpression();
         ExecuteNode node = executeNode;
 
-        final FunctionNode currentFunction = getLexicalContext().getCurrentFunction();
+        final FunctionNode currentFunction = lc.getCurrentFunction();
 
         if (currentFunction.isProgram()) {
             if (!(expr instanceof Block) || expr instanceof FunctionNode) { // it's not a block, but can be a function
@@ -216,7 +213,7 @@ final class Lower extends NodeOperatorVisitor {
 
         final Node  test = forNode.getTest();
         if (!forNode.isForIn() && conservativeAlwaysTrue(test)) {
-            newForNode = forNode.setTest(getLexicalContext(), null);
+            newForNode = forNode.setTest(lc, null);
         }
 
         return addStatement(checkEscape(newForNode));
@@ -230,7 +227,7 @@ final class Lower extends NodeOperatorVisitor {
     @Override
     public Node leaveFunctionNode(final FunctionNode functionNode) {
         LOG.info("END FunctionNode: ", functionNode.getName());
-        return functionNode.setState(getLexicalContext(), CompilationState.LOWERED);
+        return functionNode.setState(lc, CompilationState.LOWERED);
     }
 
     @Override
@@ -261,19 +258,25 @@ final class Lower extends NodeOperatorVisitor {
         return throwNode;
     }
 
-    private static Node ensureUniqueLabelsIn(final Node node) {
-        return node.accept(new NodeVisitor() {
-           @Override
-           public Node leaveDefault(final Node labelledNode) {
-               return labelledNode.ensureUniqueLabels(getLexicalContext());
-           }
+    private static Node ensureUniqueNamesIn(final LexicalContext lc, final Node node) {
+        return node.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
+            @Override
+            public Node leaveFunctionNode(final FunctionNode functionNode) {
+                final String name = functionNode.getName();
+                return functionNode.setName(lc, lc.getCurrentFunction().uniqueName(name));
+            }
+
+            @Override
+            public Node leaveDefault(final Node labelledNode) {
+                return labelledNode.ensureUniqueLabels(lc);
+            }
         });
     }
 
-    private static List<Statement> copyFinally(final Block finallyBody) {
+    private static List<Statement> copyFinally(final LexicalContext lc, final Block finallyBody) {
         final List<Statement> newStatements = new ArrayList<>();
         for (final Statement statement : finallyBody.getStatements()) {
-            newStatements.add((Statement)ensureUniqueLabelsIn(statement));
+            newStatements.add((Statement)ensureUniqueNamesIn(lc, statement));
             if (statement.hasTerminalFlags()) {
                 return newStatements;
             }
@@ -286,12 +289,12 @@ final class Lower extends NodeOperatorVisitor {
         final long token      = tryNode.getToken();
         final int  finish     = tryNode.getFinish();
 
-        final IdentNode exception = new IdentNode(token, finish, getLexicalContext().getCurrentFunction().uniqueName("catch_all"));
+        final IdentNode exception = new IdentNode(token, finish, lc.getCurrentFunction().uniqueName("catch_all"));
 
-        final Block catchBody = new Block(lineNumber, token, finish, new ThrowNode(lineNumber, token, finish, new IdentNode(exception))).
-                setIsTerminal(getLexicalContext(), true); //ends with throw, so terminal
+        final Block catchBody = new Block(lineNumber, token, finish, new ThrowNode(lineNumber, token, finish, new IdentNode(exception), ThrowNode.IS_SYNTHETIC_RETHROW)).
+                setIsTerminal(lc, true); //ends with throw, so terminal
 
-        final CatchNode catchAllNode  = new CatchNode(lineNumber, token, finish, new IdentNode(exception), null, catchBody);
+        final CatchNode catchAllNode  = new CatchNode(lineNumber, token, finish, new IdentNode(exception), null, catchBody, CatchNode.IS_SYNTHETIC_RETHROW);
         final Block     catchAllBlock = new Block(lineNumber, token, finish, catchAllNode);
 
         //catchallblock -> catchallnode (catchnode) -> exception -> throw
@@ -300,7 +303,7 @@ final class Lower extends NodeOperatorVisitor {
     }
 
     private IdentNode compilerConstant(final CompilerConstants cc) {
-        final FunctionNode functionNode = getLexicalContext().getCurrentFunction();
+        final FunctionNode functionNode = lc.getCurrentFunction();
         return new IdentNode(functionNode.getToken(), functionNode.getFinish(), cc.symbolName());
     }
 
@@ -316,11 +319,10 @@ final class Lower extends NodeOperatorVisitor {
      * @return new try node after splicing finally code (same if nop)
      */
     private Node spliceFinally(final TryNode tryNode, final List<ThrowNode> rethrows, final Block finallyBody) {
-        final int finish = tryNode.getFinish();
-
         assert tryNode.getFinallyBody() == null;
+        final int            finish = tryNode.getFinish();
 
-        final TryNode newTryNode = (TryNode)tryNode.accept(new NodeVisitor() {
+        final TryNode newTryNode = (TryNode)tryNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             final List<Node> insideTry = new ArrayList<>();
 
             @Override
@@ -338,7 +340,7 @@ final class Lower extends NodeOperatorVisitor {
             @Override
             public Node leaveThrowNode(final ThrowNode throwNode) {
                 if (rethrows.contains(throwNode)) {
-                    final List<Statement> newStatements = copyFinally(finallyBody);
+                    final List<Statement> newStatements = copyFinally(lc, finallyBody);
                     if (!isTerminal(newStatements)) {
                         newStatements.add(throwNode);
                     }
@@ -349,12 +351,12 @@ final class Lower extends NodeOperatorVisitor {
 
             @Override
             public Node leaveBreakNode(final BreakNode breakNode) {
-                return copy(breakNode, Lower.this.getLexicalContext().getBreakable(breakNode.getLabel()));
+                return copy(breakNode, Lower.this.lc.getBreakable(breakNode.getLabel()));
             }
 
             @Override
             public Node leaveContinueNode(final ContinueNode continueNode) {
-                return copy(continueNode, Lower.this.getLexicalContext().getContinueTo(continueNode.getLabel()));
+                return copy(continueNode, Lower.this.lc.getContinueTo(continueNode.getLabel()));
             }
 
             @Override
@@ -372,17 +374,17 @@ final class Lower extends NodeOperatorVisitor {
                     resultNode = null;
                 }
 
-                newStatements.addAll(copyFinally(finallyBody));
+                newStatements.addAll(copyFinally(lc, finallyBody));
                 if (!isTerminal(newStatements)) {
                     newStatements.add(expr == null ? returnNode : returnNode.setExpression(resultNode));
                 }
 
-                return new ExecuteNode(returnNode.getLineNumber(), returnNode.getToken(), returnNode.getFinish(), new Block(returnNode.getLineNumber(), returnNode.getToken(), getLexicalContext().getCurrentBlock().getFinish(), newStatements));
+                return new ExecuteNode(returnNode.getLineNumber(), returnNode.getToken(), returnNode.getFinish(), new Block(returnNode.getLineNumber(), returnNode.getToken(), lc.getCurrentBlock().getFinish(), newStatements));
             }
 
             private Node copy(final Statement endpoint, final Node targetNode) {
                 if (!insideTry.contains(targetNode)) {
-                    final List<Statement> newStatements = copyFinally(finallyBody);
+                    final List<Statement> newStatements = copyFinally(lc, finallyBody);
                     if (!isTerminal(newStatements)) {
                         newStatements.add(endpoint);
                     }
@@ -436,7 +438,7 @@ final class Lower extends NodeOperatorVisitor {
         final Block catchAll = catchAllBlock(tryNode);
 
         final List<ThrowNode> rethrows = new ArrayList<>();
-        catchAll.accept(new NodeVisitor() {
+        catchAll.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             @Override
             public boolean enterThrowNode(final ThrowNode throwNode) {
                 rethrows.add(throwNode);
@@ -464,7 +466,7 @@ final class Lower extends NodeOperatorVisitor {
     @Override
     public Node leaveVarNode(final VarNode varNode) {
         addStatement(varNode);
-        if (varNode.getFlag(VarNode.IS_LAST_FUNCTION_DECLARATION) && getLexicalContext().getCurrentFunction().isProgram()) {
+        if (varNode.getFlag(VarNode.IS_LAST_FUNCTION_DECLARATION) && lc.getCurrentFunction().isProgram()) {
             new ExecuteNode(varNode.getLineNumber(), varNode.getToken(), varNode.getFinish(), new IdentNode(varNode.getName())).accept(this);
         }
         return varNode;
@@ -478,7 +480,7 @@ final class Lower extends NodeOperatorVisitor {
         if (conservativeAlwaysTrue(test)) {
             //turn it into a for node without a test.
             final ForNode forNode = (ForNode)new ForNode(whileNode.getLineNumber(), whileNode.getToken(), whileNode.getFinish(), null, null, body, null, ForNode.IS_FOR).accept(this);
-            getLexicalContext().replace(whileNode, forNode);
+            lc.replace(whileNode, forNode);
             return forNode;
         }
 
@@ -513,7 +515,7 @@ final class Lower extends NodeOperatorVisitor {
      * @return eval location
      */
     private String evalLocation(final IdentNode node) {
-        final Source source = getLexicalContext().getCurrentFunction().getSource();
+        final Source source = lc.getCurrentFunction().getSource();
         return new StringBuilder().
             append(source.getName()).
             append('#').
@@ -545,10 +547,10 @@ final class Lower extends NodeOperatorVisitor {
 
             // 'eval' call with at least one argument
             if (args.size() >= 1 && EVAL.symbolName().equals(callee.getName())) {
-                final FunctionNode currentFunction = getLexicalContext().getCurrentFunction();
+                final FunctionNode currentFunction = lc.getCurrentFunction();
                 return callNode.setEvalArgs(
                     new CallNode.EvalArgs(
-                        ensureUniqueLabelsIn(args.get(0)).accept(this),
+                        ensureUniqueNamesIn(lc, args.get(0)).accept(this),
                         compilerConstant(THIS),
                         evalLocation(callee),
                         currentFunction.isStrict()));
@@ -574,7 +576,7 @@ final class Lower extends NodeOperatorVisitor {
     private static boolean controlFlowEscapes(final LexicalContext lex, final Block loopBody) {
         final List<Node> escapes = new ArrayList<>();
 
-        loopBody.accept(new NodeVisitor() {
+        loopBody.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             @Override
             public Node leaveBreakNode(final BreakNode node) {
                 escapes.add(node);
@@ -595,7 +597,6 @@ final class Lower extends NodeOperatorVisitor {
     }
 
     private LoopNode checkEscape(final LoopNode loopNode) {
-        final LexicalContext lc = getLexicalContext();
         final boolean escapes = controlFlowEscapes(lc, loopNode.getBody());
         if (escapes) {
             return loopNode.
@@ -607,7 +608,7 @@ final class Lower extends NodeOperatorVisitor {
 
 
     private Node addStatement(final Statement statement) {
-        ((BlockLexicalContext)getLexicalContext()).appendStatement(statement);
+        lc.appendStatement(statement);
         return statement;
     }
 
diff --git a/src/jdk/nashorn/internal/codegen/MethodEmitter.java b/src/jdk/nashorn/internal/codegen/MethodEmitter.java
index c156c865..4e07c477 100644
--- a/src/jdk/nashorn/internal/codegen/MethodEmitter.java
+++ b/src/jdk/nashorn/internal/codegen/MethodEmitter.java
@@ -2081,7 +2081,9 @@ public class MethodEmitter implements Emitter {
      * @param args debug information to print
      */
     private void debug(final Object... args) {
-        debug(30, args);
+        if (DEBUG) {
+            debug(30, args);
+        }
     }
 
     /**
@@ -2091,7 +2093,9 @@ public class MethodEmitter implements Emitter {
      * @param args debug information to print
      */
     private void debug_label(final Object... args) {
-        debug(26, args);
+        if (DEBUG) {
+            debug(22, args);
+        }
     }
 
     private void debug(final int padConstant, final Object... args) {
@@ -2164,7 +2168,6 @@ public class MethodEmitter implements Emitter {
                     new Throwable().printStackTrace(LOG.getOutputStream());
                 }
             }
-
         }
     }
 
diff --git a/src/jdk/nashorn/internal/codegen/RangeAnalyzer.java b/src/jdk/nashorn/internal/codegen/RangeAnalyzer.java
new file mode 100644
index 00000000..ab61d374
--- /dev/null
+++ b/src/jdk/nashorn/internal/codegen/RangeAnalyzer.java
@@ -0,0 +1,476 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.nashorn.internal.codegen;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+
+import jdk.nashorn.internal.codegen.types.Range;
+import jdk.nashorn.internal.codegen.types.Type;
+import jdk.nashorn.internal.ir.Assignment;
+import jdk.nashorn.internal.ir.BinaryNode;
+import jdk.nashorn.internal.ir.ForNode;
+import jdk.nashorn.internal.ir.IdentNode;
+import jdk.nashorn.internal.ir.LexicalContext;
+import jdk.nashorn.internal.ir.LiteralNode;
+import jdk.nashorn.internal.ir.LiteralNode.ArrayLiteralNode;
+import jdk.nashorn.internal.ir.LoopNode;
+import jdk.nashorn.internal.ir.Node;
+import jdk.nashorn.internal.ir.RuntimeNode;
+import jdk.nashorn.internal.ir.Symbol;
+import jdk.nashorn.internal.ir.UnaryNode;
+import jdk.nashorn.internal.ir.VarNode;
+import jdk.nashorn.internal.ir.visitor.NodeOperatorVisitor;
+import jdk.nashorn.internal.ir.visitor.NodeVisitor;
+import jdk.nashorn.internal.parser.TokenType;
+import jdk.nashorn.internal.runtime.DebugLogger;
+
+/**
+ * Range analysis and narrowing of type where it can be proven
+ * that there is no spillover, e.g.
+ *
+ *  function func(c) {
+ *    var v = c & 0xfff;
+ *    var w = c & 0xeee;
+ *    var x = v * w;
+ *    return x;
+ *  }
+ *
+ *  Proves that the multiplication never exceeds 24 bits and can thus be an int
+ */
+final class RangeAnalyzer extends NodeOperatorVisitor<LexicalContext> {
+    static final DebugLogger LOG = new DebugLogger("ranges");
+
+    private static final Range.Functionality RANGE = new Range.Functionality(LOG);
+
+    private final Map<LoopNode, Symbol> loopCounters = new HashMap<>();
+
+    RangeAnalyzer() {
+        super(new LexicalContext());
+    }
+
+    @Override
+    public boolean enterForNode(final ForNode forNode) {
+        //conservatively attempt to identify the loop counter. Null means that it wasn't
+        //properly identified and that no optimizations can be made with it - its range is
+        //simply unknown in that case, if it is assigned in the loop
+        final Symbol counter = findLoopCounter(forNode);
+        LOG.fine("Entering forNode " + forNode + " counter = " + counter);
+        if (counter != null && !assignedInLoop(forNode,  counter)) {
+            loopCounters.put(forNode, counter);
+        }
+        return true;
+    }
+
+    //destination visited
+    private Symbol setRange(final Node dest, final Range range) {
+        if (range.isUnknown()) {
+            return null;
+        }
+
+        final Symbol symbol = dest.getSymbol();
+        assert symbol != null : dest + " " + dest.getClass() + " has no symbol";
+        assert symbol.getRange() != null : symbol + " has no range";
+        final Range symRange = RANGE.join(symbol.getRange(), range);
+
+        //anything assigned in the loop, not being the safe loop counter(s) invalidates its entire range
+        if (lc.inLoop() && !isLoopCounter(lc.getCurrentLoop(), symbol)) {
+            symbol.setRange(Range.createGenericRange());
+            return symbol;
+        }
+
+        if (!symRange.equals(symbol.getRange())) {
+            LOG.fine("Modify range for " + dest + " " + symbol + " from " + symbol.getRange() + " to " + symRange + " (in node = " + dest + ")" );
+            symbol.setRange(symRange);
+        }
+
+        return null;
+    }
+
+    @Override
+    public Node leaveADD(final BinaryNode node) {
+        setRange(node, RANGE.add(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveSUB(final BinaryNode node) {
+        setRange(node, RANGE.sub(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveMUL(final BinaryNode node) {
+        setRange(node, RANGE.mul(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveDIV(final BinaryNode node) {
+        setRange(node, RANGE.div(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveMOD(final BinaryNode node) {
+        setRange(node, RANGE.mod(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveBIT_AND(final BinaryNode node) {
+        setRange(node, RANGE.and(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveBIT_OR(final BinaryNode node) {
+        setRange(node, RANGE.or(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveBIT_XOR(final BinaryNode node) {
+        setRange(node, RANGE.xor(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveSAR(final BinaryNode node) {
+        setRange(node, RANGE.sar(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveSHL(final BinaryNode node) {
+        setRange(node, RANGE.shl(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveSHR(final BinaryNode node) {
+        setRange(node, RANGE.shr(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    private Node leaveCmp(final BinaryNode node) {
+        setRange(node, Range.createTypeRange(Type.BOOLEAN));
+        return node;
+    }
+
+    @Override
+    public Node leaveEQ(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveEQ_STRICT(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveNE(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveNE_STRICT(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveLT(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveLE(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveGT(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveGE(final BinaryNode node) {
+        return leaveCmp(node);
+    }
+
+    @Override
+    public Node leaveASSIGN(final BinaryNode node) {
+        Range range = node.rhs().getSymbol().getRange();
+        if (range.isUnknown()) {
+            range = Range.createGenericRange();
+        }
+
+        setRange(node.lhs(), range);
+        setRange(node, range);
+
+        return node;
+    }
+
+    private Node leaveSelfModifyingAssign(final BinaryNode node, final Range range) {
+        setRange(node.lhs(), range);
+        setRange(node, range);
+        return node;
+    }
+
+    private Node leaveSelfModifyingAssign(final UnaryNode node, final Range range) {
+        setRange(node.rhs(), range);
+        setRange(node, range);
+        return node;
+    }
+
+    @Override
+    public Node leaveASSIGN_ADD(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.add(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_SUB(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.sub(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_MUL(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.mul(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_DIV(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, Range.createTypeRange(Type.NUMBER));
+    }
+
+    @Override
+    public Node leaveASSIGN_MOD(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, Range.createTypeRange(Type.NUMBER));
+    }
+
+    @Override
+    public Node leaveASSIGN_BIT_AND(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.and(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_BIT_OR(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.or(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_BIT_XOR(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.xor(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_SAR(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.sar(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_SHR(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.shr(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveASSIGN_SHL(final BinaryNode node) {
+        return leaveSelfModifyingAssign(node, RANGE.shl(node.lhs().getSymbol().getRange(), node.rhs().getSymbol().getRange()));
+    }
+
+    @Override
+    public Node leaveDECINC(final UnaryNode node) {
+        switch (node.tokenType()) {
+        case DECPREFIX:
+        case DECPOSTFIX:
+            return leaveSelfModifyingAssign(node, RANGE.sub(node.rhs().getSymbol().getRange(), Range.createRange(1)));
+        case INCPREFIX:
+        case INCPOSTFIX:
+            return leaveSelfModifyingAssign(node, RANGE.add(node.rhs().getSymbol().getRange(), Range.createRange(1)));
+        default:
+            assert false;
+            return node;
+        }
+    }
+
+    @Override
+    public Node leaveADD(final UnaryNode node) {
+        Range range = node.rhs().getSymbol().getRange();
+        if (!range.getType().isNumeric()) {
+           range = Range.createTypeRange(Type.NUMBER);
+        }
+        setRange(node, range);
+        return node;
+    }
+
+    @Override
+    public Node leaveBIT_NOT(final UnaryNode node) {
+        setRange(node, Range.createTypeRange(Type.INT));
+        return node;
+    }
+
+    @Override
+    public Node leaveNOT(final UnaryNode node) {
+        setRange(node, Range.createTypeRange(Type.BOOLEAN));
+        return node;
+    }
+
+    @Override
+    public Node leaveSUB(final UnaryNode node) {
+        setRange(node, RANGE.neg(node.rhs().getSymbol().getRange()));
+        return node;
+    }
+
+    @Override
+    public Node leaveVarNode(final VarNode node) {
+        if (node.isAssignment()) {
+            Range range = node.getInit().getSymbol().getRange();
+            range = range.isUnknown() ? Range.createGenericRange() : range;
+
+            setRange(node.getName(), range);
+            setRange(node, range);
+        }
+
+        return node;
+    }
+
+    @SuppressWarnings("rawtypes")
+    @Override
+    public boolean enterLiteralNode(final LiteralNode node) {
+        // ignore array literals
+        return !(node instanceof ArrayLiteralNode);
+    }
+
+    @Override
+    public Node leaveLiteralNode(@SuppressWarnings("rawtypes") final LiteralNode node) {
+        if (node.getType().isInteger()) {
+            setRange(node, Range.createRange(node.getInt32()));
+        } else if (node.getType().isNumber()) {
+            setRange(node, Range.createRange(node.getNumber()));
+        } else if (node.getType().isLong()) {
+            setRange(node, Range.createRange(node.getLong()));
+        } else if (node.getType().isBoolean()) {
+            setRange(node, Range.createTypeRange(Type.BOOLEAN));
+        } else {
+            setRange(node, Range.createGenericRange());
+        }
+        return node;
+    }
+
+    @Override
+    public boolean enterRuntimeNode(final RuntimeNode node) {
+        // a runtime node that cannot be specialized is no point entering
+        return node.getRequest().canSpecialize();
+    }
+
+    /**
+     * Check whether a symbol is unsafely assigned in a loop - i.e. repeteadly assigned and
+     * not being identified as the loop counter. That means we don't really know anything
+     * about its range.
+     * @param loopNode loop node
+     * @param symbol   symbol
+     * @return true if assigned in loop
+     */
+    // TODO - this currently checks for nodes only - needs to be augmented for while nodes
+    // assignment analysis is also very conservative
+    private static boolean assignedInLoop(final LoopNode loopNode, final Symbol symbol) {
+        final HashSet<Node> skip = new HashSet<>();
+        final HashSet<Node> assignmentsInLoop = new HashSet<>();
+
+        loopNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
+            private boolean assigns(final Node node, final Symbol s) {
+                return node.isAssignment() && ((Assignment<?>)node).getAssignmentDest().getSymbol() == s;
+            }
+
+            @Override
+            public boolean enterForNode(final ForNode forNode) {
+                if (forNode.getInit() != null) {
+                    skip.add(forNode.getInit());
+                }
+                if (forNode.getModify() != null) {
+                    skip.add(forNode.getModify());
+                }
+                return true;
+            }
+
+            @Override
+            public Node leaveDefault(final Node node) {
+                //if this is an assignment to symbol
+                if (!skip.contains(node) && assigns(node, symbol)) {
+                    assignmentsInLoop.add(node);
+                }
+                return node;
+            }
+        });
+
+        return !assignmentsInLoop.isEmpty();
+    }
+
+    /**
+     * Check for a loop counter. This is currently quite conservative, in that it only handles
+     * x <= counter and x < counter.
+     *
+     * @param node loop node to check
+     * @return
+     */
+    private static Symbol findLoopCounter(final LoopNode node) {
+        final Node test = node.getTest();
+
+        if (test != null && test.isComparison()) {
+            final BinaryNode binaryNode = (BinaryNode)test;
+            final Node lhs = binaryNode.lhs();
+            final Node rhs = binaryNode.rhs();
+
+            //detect ident cmp int_literal
+            if (lhs instanceof IdentNode && rhs instanceof LiteralNode && ((LiteralNode<?>)rhs).getType().isInteger()) {
+                final Symbol    symbol = lhs.getSymbol();
+                final int       margin = ((LiteralNode<?>)rhs).getInt32();
+                final TokenType op     = test.tokenType();
+
+                switch (op) {
+                case LT:
+                case LE:
+                    symbol.setRange(RANGE.join(symbol.getRange(), Range.createRange(op == TokenType.LT ? margin - 1 : margin)));
+                    return symbol;
+                case GT:
+                case GE:
+                    //setRange(lhs, Range.createRange(op == TokenType.GT ? margin + 1 : margin));
+                    //return symbol;
+                default:
+                    break;
+                }
+            }
+        }
+
+        return null;
+    }
+
+    private boolean isLoopCounter(final LoopNode loopNode, final Symbol symbol) {
+        //this only works if loop nodes aren't replaced by other ones during this transform, but they are not
+        return loopCounters.get(loopNode) == symbol;
+    }
+}
diff --git a/src/jdk/nashorn/internal/codegen/SharedScopeCall.java b/src/jdk/nashorn/internal/codegen/SharedScopeCall.java
index 588e2f48..c7dfb40a 100644
--- a/src/jdk/nashorn/internal/codegen/SharedScopeCall.java
+++ b/src/jdk/nashorn/internal/codegen/SharedScopeCall.java
@@ -116,9 +116,10 @@ class SharedScopeCall {
     /**
      * Generate the invoke instruction for this shared scope call.
      * @param method the method emitter
+     * @return the method emitter
      */
-    public void generateInvoke(final MethodEmitter method) {
-        method.invokestatic(compileUnit.getUnitClassName(), methodName, getStaticSignature());
+    public MethodEmitter generateInvoke(final MethodEmitter method) {
+        return method.invokestatic(compileUnit.getUnitClassName(), methodName, getStaticSignature());
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/codegen/Splitter.java b/src/jdk/nashorn/internal/codegen/Splitter.java
index f18f686e..e724ce26 100644
--- a/src/jdk/nashorn/internal/codegen/Splitter.java
+++ b/src/jdk/nashorn/internal/codegen/Splitter.java
@@ -49,12 +49,12 @@ import jdk.nashorn.internal.runtime.options.Options;
 /**
  * Split the IR into smaller compile units.
  */
-final class Splitter extends NodeVisitor {
+final class Splitter extends NodeVisitor<LexicalContext> {
     /** Current compiler. */
     private final Compiler compiler;
 
     /** IR to be broken down. */
-    private FunctionNode outermost;
+    private final FunctionNode outermost;
 
     /** Compile unit for the main script. */
     private final CompileUnit outermostCompileUnit;
@@ -75,6 +75,7 @@ final class Splitter extends NodeVisitor {
      * @param outermostCompileUnit  compile unit for outermost function, if non-lazy this is the script's compile unit
      */
     public Splitter(final Compiler compiler, final FunctionNode functionNode, final CompileUnit outermostCompileUnit) {
+        super(new LexicalContext());
         this.compiler             = compiler;
         this.outermost            = functionNode;
         this.outermostCompileUnit = outermostCompileUnit;
@@ -93,8 +94,6 @@ final class Splitter extends NodeVisitor {
 
         LOG.finest("Initiating split of '", functionNode.getName(), "'");
 
-        final LexicalContext lc = getLexicalContext();
-
         long weight = WeighNodes.weigh(functionNode);
         final boolean top = fn.isProgram(); //compiler.getFunctionNode() == outermost;
 
@@ -127,7 +126,7 @@ final class Splitter extends NodeVisitor {
         final Block body = functionNode.getBody();
         final List<FunctionNode> dc = directChildren(functionNode);
 
-        final Block newBody = (Block)body.accept(new NodeVisitor() {
+        final Block newBody = (Block)body.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             @Override
             public boolean enterFunctionNode(final FunctionNode nestedFunction) {
                 return dc.contains(nestedFunction);
@@ -136,7 +135,7 @@ final class Splitter extends NodeVisitor {
             @Override
             public Node leaveFunctionNode(final FunctionNode nestedFunction) {
                 FunctionNode split = new Splitter(compiler, nestedFunction, outermostCompileUnit).split(nestedFunction);
-                getLexicalContext().replace(nestedFunction, split);
+                lc.replace(nestedFunction, split);
                 return split;
             }
         });
@@ -149,13 +148,13 @@ final class Splitter extends NodeVisitor {
 
     private static List<FunctionNode> directChildren(final FunctionNode functionNode) {
         final List<FunctionNode> dc = new ArrayList<>();
-        functionNode.accept(new NodeVisitor() {
+        functionNode.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
             @Override
             public boolean enterFunctionNode(final FunctionNode child) {
                 if (child == functionNode) {
                     return true;
                 }
-                if (getLexicalContext().getParentFunction(child) == functionNode) {
+                if (lc.getParentFunction(child) == functionNode) {
                     dc.add(child);
                 }
                 return false;
@@ -181,7 +180,7 @@ final class Splitter extends NodeVisitor {
      * @return new weight for the resulting block.
      */
     private Block splitBlock(final Block block, final FunctionNode function) {
-        getLexicalContext().setFlag(getLexicalContext().getCurrentFunction(), FunctionNode.IS_SPLIT);
+        lc.setFlag(lc.getCurrentFunction(), FunctionNode.IS_SPLIT);
 
         final List<Statement> splits = new ArrayList<>();
         List<Statement> statements = new ArrayList<>();
@@ -210,7 +209,7 @@ final class Splitter extends NodeVisitor {
             splits.add(createBlockSplitNode(block, function, statements, statementsWeight));
         }
 
-        return block.setStatements(getLexicalContext(), splits);
+        return block.setStatements(lc, splits);
     }
 
     /**
@@ -258,7 +257,7 @@ final class Splitter extends NodeVisitor {
         // been split already, so weigh again before splitting.
         long weight = WeighNodes.weigh(block, weightCache);
         if (weight >= SPLIT_THRESHOLD) {
-            newBlock = splitBlock(block, getLexicalContext().getFunction(block));
+            newBlock = splitBlock(block, lc.getFunction(block));
             weight   = WeighNodes.weigh(newBlock, weightCache);
         }
         weightCache.put(newBlock, weight);
@@ -274,9 +273,9 @@ final class Splitter extends NodeVisitor {
             return literal;
         }
 
-        final FunctionNode functionNode = getLexicalContext().getCurrentFunction();
+        final FunctionNode functionNode = lc.getCurrentFunction();
 
-        getLexicalContext().setFlag(functionNode, FunctionNode.IS_SPLIT);
+        lc.setFlag(functionNode, FunctionNode.IS_SPLIT);
 
         if (literal instanceof ArrayLiteralNode) {
             final ArrayLiteralNode arrayLiteralNode = (ArrayLiteralNode) literal;
diff --git a/src/jdk/nashorn/internal/codegen/WeighNodes.java b/src/jdk/nashorn/internal/codegen/WeighNodes.java
index 002cc902..1adef12b 100644
--- a/src/jdk/nashorn/internal/codegen/WeighNodes.java
+++ b/src/jdk/nashorn/internal/codegen/WeighNodes.java
@@ -27,6 +27,7 @@ package jdk.nashorn.internal.codegen;
 
 import java.util.List;
 import java.util.Map;
+
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.AccessNode;
 import jdk.nashorn.internal.ir.BinaryNode;
@@ -41,6 +42,7 @@ import jdk.nashorn.internal.ir.FunctionNode;
 import jdk.nashorn.internal.ir.IdentNode;
 import jdk.nashorn.internal.ir.IfNode;
 import jdk.nashorn.internal.ir.IndexNode;
+import jdk.nashorn.internal.ir.LexicalContext;
 import jdk.nashorn.internal.ir.LiteralNode;
 import jdk.nashorn.internal.ir.LiteralNode.ArrayLiteralNode;
 import jdk.nashorn.internal.ir.LiteralNode.ArrayLiteralNode.ArrayUnit;
@@ -63,7 +65,7 @@ import jdk.nashorn.internal.ir.visitor.NodeOperatorVisitor;
  * Computes the "byte code" weight of an AST segment. This is used
  * for Splitting too large class files
  */
-final class WeighNodes extends NodeOperatorVisitor {
+final class WeighNodes extends NodeOperatorVisitor<LexicalContext> {
     /*
      * Weight constants.
      */
@@ -100,7 +102,7 @@ final class WeighNodes extends NodeOperatorVisitor {
      * @param weightCache cache of already calculated block weights
      */
     private WeighNodes(FunctionNode topFunction, final Map<Node, Long> weightCache) {
-        super();
+        super(new LexicalContext());
         this.topFunction = topFunction;
         this.weightCache = weightCache;
     }
diff --git a/src/jdk/nashorn/internal/codegen/types/Range.java b/src/jdk/nashorn/internal/codegen/types/Range.java
new file mode 100644
index 00000000..2845d902
--- /dev/null
+++ b/src/jdk/nashorn/internal/codegen/types/Range.java
@@ -0,0 +1,705 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.nashorn.internal.codegen.types;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import jdk.nashorn.internal.runtime.DebugLogger;
+import jdk.nashorn.internal.runtime.JSType;
+
+/**
+ * Represents the value range of a symbol.
+ */
+public abstract class Range {
+
+    private static final Range GENERIC_RANGE = new Range() {
+        @Override
+        public Type getType() {
+            return Type.OBJECT;
+        }
+    };
+
+    private static final Range NUMBER_RANGE = new Range() {
+        @Override
+        public Type getType() {
+            return Type.NUMBER;
+        }
+    };
+
+    private static final Range UNKNOWN_RANGE = new Range() {
+        @Override
+        public Type getType() {
+            return Type.UNKNOWN;
+        }
+
+        @Override
+        public boolean isUnknown() {
+            return true;
+        }
+    };
+
+    private static class IntegerRange extends Range {
+        private final long min;
+        private final long max;
+        private final Type type;
+
+        private IntegerRange(final long min, final long max) {
+            assert min <= max;
+            this.min  = min;
+            this.max  = max;
+            this.type = typeFromRange(min, max);
+        }
+
+        private static Type typeFromRange(final long from, final long to) {
+            if (from >= Integer.MIN_VALUE && to <= Integer.MAX_VALUE) {
+                return Type.INT;
+            }
+            return Type.LONG;
+        }
+
+        @Override
+        public Type getType() {
+            return type;
+        }
+
+        public long getMin() {
+            return min;
+        }
+
+        public long getMax() {
+            return max;
+        }
+
+        @Override
+        public boolean isIntegerConst() {
+            return getMin() == getMax();
+        }
+
+        private long getBitMask() {
+            if (min == max) {
+                return min;
+            }
+
+            if (min < 0) {
+                return ~0L;
+            }
+
+            long mask = 1;
+            while (mask < max) {
+                mask = (mask << 1) | 1;
+            }
+            return mask;
+        }
+
+        @Override
+        public boolean equals(final Object obj) {
+            if (obj instanceof IntegerRange) {
+                final IntegerRange other = (IntegerRange)obj;
+                return this.type == other.type && this.min == other.min && this.max == other.max;
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return Long.hashCode(min) ^ Long.hashCode(max);
+        }
+
+        @Override
+        public String toString() {
+            return super.toString() + "[" + min +", " + max + "]";
+        }
+    }
+
+    /**
+     * Get narrowest type for this range
+     * @return type
+     */
+    public abstract Type getType();
+
+    /**
+     * Is this range unknown
+     * @return true if unknown
+     */
+    public boolean isUnknown() {
+        return false;
+    }
+
+    /**
+     * Check if an integer is enough to span this range
+     * @return true if integer is enough
+     */
+    public boolean isIntegerType() {
+        return this instanceof IntegerRange;
+    }
+
+    /**
+     * Check if an integer is enough to span this range
+     * @return true if integer is enough
+     */
+    public boolean isIntegerConst() {
+        return false;
+    }
+
+    /**
+     * Create an unknown range - this is most likely a singleton object
+     * and it represents "we have no known range information"
+     * @return the range
+     */
+    public static Range createUnknownRange() {
+        return UNKNOWN_RANGE;
+    }
+
+    /**
+     * Create a constant range: [value, value]
+     * @param value value
+     * @return the range
+     */
+    public static Range createRange(final int value) {
+        return createIntegerRange(value, value);
+    }
+
+    /**
+     * Create a constant range: [value, value]
+     * @param value value
+     * @return the range
+     */
+    public static Range createRange(final long value) {
+        return createIntegerRange(value, value);
+    }
+
+    /**
+     * Create a constant range: [value, value]
+     * @param value value
+     * @return the range
+     */
+    public static Range createRange(final double value) {
+        if (isRepresentableAsLong(value)) {
+            return createIntegerRange((long) value, (long) value);
+        }
+        return createNumberRange();
+    }
+
+    /**
+     * Create a constant range: [value, value]
+     * @param value value
+     * @return the range
+     */
+    public static Range createRange(final Object value) {
+        if (value instanceof Integer) {
+            return createRange((int)value);
+        } else if (value instanceof Long) {
+            return createRange((long)value);
+        } else if (value instanceof Double) {
+            return createRange((double)value);
+        }
+
+        return createGenericRange();
+    }
+
+    /**
+     * Create a generic range - object symbol that carries no range
+     * information
+     * @return the range
+     */
+    public static Range createGenericRange() {
+        return GENERIC_RANGE;
+    }
+
+    /**
+     * Create a number range - number symbol that carries no range
+     * information
+     * @return the range
+     */
+    public static Range createNumberRange() {
+        return NUMBER_RANGE;
+    }
+
+    /**
+     * Create an integer range [min, max]
+     * @param min minimum value, inclusive
+     * @param max maximum value, inclusive
+     * @return the range
+     */
+    public static IntegerRange createIntegerRange(final long min, final long max) {
+        return new IntegerRange(min, max);
+    }
+
+    /**
+     * Create an integer range of maximum type width for the given type
+     * @param type the type
+     * @return the range
+     */
+    public static IntegerRange createIntegerRange(final Type type) {
+        assert type.isNumeric() && !type.isNumber();
+        final long min;
+        final long max;
+        if (type.isInteger()) {
+            min = Integer.MIN_VALUE;
+            max = Integer.MAX_VALUE;
+        } else if (type.isLong()) {
+            min = Long.MIN_VALUE;
+            max = Long.MAX_VALUE;
+        } else {
+            throw new AssertionError(); //type incompatible with integer range
+        }
+        return new IntegerRange(min, max);
+    }
+
+    /**
+     * Create an range of maximum type width for the given type
+     * @param type the type
+     * @return the range
+     */
+    public static Range createTypeRange(final Type type) {
+        if (type.isNumber()) {
+            return createNumberRange();
+        } else if (type.isNumeric()) {
+            return createIntegerRange(type);
+        } else {
+            return createGenericRange();
+        }
+    }
+
+    // check that add doesn't overflow
+    private static boolean checkAdd(final long a, final long b) {
+        final long result = a + b;
+        return ((a ^ result) & (b ^ result)) >= 0;
+    }
+
+    // check that sub doesn't overflow
+    private static boolean checkSub(final long a, final long b) {
+        final long result = a - b;
+        return ((a ^ result) & (b ^ result)) >= 0;
+    }
+
+    private static boolean checkMul(final long a, final long b) {
+        // TODO correct overflow check
+        return a >= Integer.MIN_VALUE && a <= Integer.MAX_VALUE && b >= Integer.MIN_VALUE && b <= Integer.MAX_VALUE;
+    }
+
+    /**
+     * The range functionality class responsible for merging ranges and drawing
+     * range conclusions from operations executed
+     */
+    public static class Functionality {
+        /** logger */
+        protected final DebugLogger log;
+
+        /**
+         * Constructor
+         * @param log logger
+         */
+        public Functionality(final DebugLogger log) {
+            this.log = log;
+        }
+
+        /**
+         * Join two ranges
+         * @param a first range
+         * @param b second range
+         * @return the joined range
+         */
+        public Range join(final Range a, final Range b) {
+            if (a.equals(b)) {
+                return a;
+            }
+
+            Type joinedType = a.getType();
+            if (a.getType() != b.getType()) {
+                if (a.isUnknown()) {
+                    return b;
+                }
+                if (b.isUnknown()) {
+                    return a;
+                }
+
+                joinedType = Type.widest(a.getType(), b.getType());
+            }
+
+            if (joinedType.isInteger() || joinedType.isLong()) {
+                return createIntegerRange(
+                        Math.min(((IntegerRange) a).getMin(), ((IntegerRange) b).getMin()),
+                        Math.max(((IntegerRange) a).getMax(), ((IntegerRange) b).getMax()));
+            }
+
+            return createTypeRange(joinedType);
+        }
+
+        /**
+         * Add operation
+         * @param a range of first symbol to be added
+         * @param b range of second symbol to be added
+         * @return resulting range representing the value range after add
+         */
+        public Range add(final Range a, final Range b) {
+            if (a.isIntegerType() && b.isIntegerType()) {
+                final IntegerRange lhs = (IntegerRange)a;
+                final IntegerRange rhs = (IntegerRange)b;
+                if (checkAdd(lhs.getMin(), rhs.getMin()) && checkAdd(lhs.getMax(), rhs.getMax())) {
+                    return createIntegerRange(lhs.getMin() + rhs.getMin(), lhs.getMax() + rhs.getMax());
+                }
+            }
+
+            if (a.getType().isNumeric() && b.getType().isNumeric()) {
+                return createNumberRange();
+            }
+
+            return createGenericRange();
+        }
+
+        /**
+         * Sub operation
+         * @param a range of first symbol to be subtracted
+         * @param b range of second symbol to be subtracted
+         * @return resulting range representing the value range after subtraction
+         */
+        public Range sub(final Range a, final Range b) {
+            if (a.isIntegerType() && b.isIntegerType()) {
+                final IntegerRange lhs = (IntegerRange)a;
+                final IntegerRange rhs = (IntegerRange)b;
+                if (checkSub(lhs.getMin(), rhs.getMax()) && checkSub(lhs.getMax(), rhs.getMin())) {
+                    return createIntegerRange(lhs.getMin() - rhs.getMax(), lhs.getMax() - rhs.getMin());
+                }
+            }
+
+            if (a.getType().isNumeric() && b.getType().isNumeric()) {
+                return createNumberRange();
+            }
+
+            return createGenericRange();
+        }
+
+        /**
+         * Mul operation
+         * @param a range of first symbol to be multiplied
+         * @param b range of second symbol to be multiplied
+         * @return resulting range representing the value range after multiplication
+         */
+        public Range mul(final Range a, final Range b) {
+            if (a.isIntegerType() && b.isIntegerType()) {
+                final IntegerRange lhs = (IntegerRange)a;
+                final IntegerRange rhs = (IntegerRange)b;
+
+                //ensure that nothing ever overflows or underflows
+                if (checkMul(lhs.getMin(), rhs.getMin()) &&
+                    checkMul(lhs.getMax(), rhs.getMax()) &&
+                    checkMul(lhs.getMin(), rhs.getMax()) &&
+                    checkMul(lhs.getMax(), rhs.getMin())) {
+
+                    final List<Long> results =
+                        Arrays.asList(
+                            lhs.getMin() * rhs.getMin(),
+                            lhs.getMin() * rhs.getMax(),
+                            lhs.getMax() * rhs.getMin(),
+                            lhs.getMax() * rhs.getMax());
+                    return createIntegerRange(Collections.min(results), Collections.max(results));
+                }
+            }
+
+            if (a.getType().isNumeric() && b.getType().isNumeric()) {
+                return createNumberRange();
+            }
+
+            return createGenericRange();
+        }
+
+        /**
+         * Neg operation
+         * @param a range of value symbol to be negated
+         * @return resulting range representing the value range after neg
+         */
+        public Range neg(final Range a) {
+            if (a.isIntegerType()) {
+                final IntegerRange rhs = (IntegerRange)a;
+                if (rhs.getMin() != Long.MIN_VALUE && rhs.getMax() != Long.MIN_VALUE) {
+                    return createIntegerRange(-rhs.getMax(), -rhs.getMin());
+                }
+            }
+
+            if (a.getType().isNumeric()) {
+                return createNumberRange();
+            }
+
+            return createGenericRange();
+        }
+
+        /**
+         * Bitwise and operation
+         * @param a range of first symbol to be and:ed
+         * @param b range of second symbol to be and:ed
+         * @return resulting range representing the value range after and
+         */
+        public Range and(final Range a, final Range b) {
+            if (a.isIntegerType() && b.isIntegerType()) {
+                final int resultMask = (int) (((IntegerRange)a).getBitMask() & ((IntegerRange)b).getBitMask());
+                if (resultMask >= 0) {
+                    return createIntegerRange(0, resultMask);
+                }
+            } else if (a.isUnknown() && b.isIntegerType()) {
+                final long operandMask = ((IntegerRange)b).getBitMask();
+                if (operandMask >= 0) {
+                    return createIntegerRange(0, operandMask);
+                }
+            } else if (a.isIntegerType() && b.isUnknown()) {
+                final long operandMask = ((IntegerRange)a).getBitMask();
+                if (operandMask >= 0) {
+                    return createIntegerRange(0, operandMask);
+                }
+            }
+
+            return createTypeRange(Type.INT);
+        }
+
+        /**
+         * Bitwise or operation
+         * @param a range of first symbol to be or:ed
+         * @param b range of second symbol to be or:ed
+         * @return resulting range representing the value range after or
+         */
+        public Range or(final Range a, final Range b) {
+            if (a.isIntegerType() && b.isIntegerType()) {
+                final int resultMask = (int)(((IntegerRange)a).getBitMask() | ((IntegerRange)b).getBitMask());
+                if (resultMask >= 0) {
+                    return createIntegerRange(0, resultMask);
+                }
+            }
+
+            return createTypeRange(Type.INT);
+        }
+
+        /**
+         * Bitwise xor operation
+         * @param a range of first symbol to be xor:ed
+         * @param b range of second symbol to be xor:ed
+         * @return resulting range representing the value range after and
+         */
+        public Range xor(final Range a, final Range b) {
+            if (a.isIntegerConst() && b.isIntegerConst()) {
+                return createRange(((IntegerRange)a).getMin() ^ ((IntegerRange)b).getMin());
+            }
+
+            if (a.isIntegerType() && b.isIntegerType()) {
+                final int resultMask = (int)(((IntegerRange)a).getBitMask() | ((IntegerRange)b).getBitMask());
+                if (resultMask >= 0) {
+                    return createIntegerRange(0, createIntegerRange(0, resultMask).getBitMask());
+                }
+            }
+            return createTypeRange(Type.INT);
+        }
+
+        /**
+         * Bitwise shl operation
+         * @param a range of first symbol to be shl:ed
+         * @param b range of second symbol to be shl:ed
+         * @return resulting range representing the value range after shl
+         */
+        public Range shl(final Range a, final Range b) {
+            if (b.isIntegerType() && b.isIntegerConst()) {
+                final IntegerRange left  = (IntegerRange)(a.isIntegerType() ? a : createTypeRange(Type.INT));
+                final int          shift = (int)((IntegerRange) b).getMin() & 0x1f;
+                final int          min   = (int)left.getMin() << shift;
+                final int          max   = (int)left.getMax() << shift;
+                if (min >> shift == left.getMin() && max >> shift == left.getMax()) {
+                    return createIntegerRange(min, max);
+                }
+            }
+
+            return createTypeRange(Type.INT);
+        }
+
+        /**
+         * Bitwise shr operation
+         * @param a range of first symbol to be shr:ed
+         * @param b range of second symbol to be shr:ed
+         * @return resulting range representing the value range after shr
+         */
+        public Range shr(final Range a, final Range b) {
+            if (b.isIntegerType() && b.isIntegerConst()) {
+                final long         shift = ((IntegerRange) b).getMin() & 0x1f;
+                final IntegerRange left  = (IntegerRange)(a.isIntegerType() ? a : createTypeRange(Type.INT));
+                if (left.getMin() >= 0) {
+                    long min = left.getMin() >>> shift;
+                    long max = left.getMax() >>> shift;
+                    return createIntegerRange(min, max);
+                } else if (shift >= 1) {
+                    return createIntegerRange(0, JSType.MAX_UINT >>> shift);
+                }
+            }
+
+            return createTypeRange(Type.INT);
+        }
+
+        /**
+         * Bitwise sar operation
+         * @param a range of first symbol to be sar:ed
+         * @param b range of second symbol to be sar:ed
+         * @return resulting range representing the value range after sar
+         */
+        public Range sar(final Range a, final Range b) {
+            if (b.isIntegerType() && b.isIntegerConst()) {
+                final IntegerRange left  = (IntegerRange)(a.isIntegerType() ? a : createTypeRange(Type.INT));
+                final long         shift = ((IntegerRange) b).getMin() & 0x1f;
+                final long         min   = left.getMin() >> shift;
+                final long         max   = left.getMax() >> shift;
+                return createIntegerRange(min, max);
+            }
+
+            return createTypeRange(Type.INT);
+        }
+
+        /**
+         * Modulo operation
+         * @param a range of first symbol to the mod operation
+         * @param b range of second symbol to be mod operation
+         * @return resulting range representing the value range after mod
+         */
+        public Range mod(final Range a, final Range b) {
+            if (a.isIntegerType() && b.isIntegerType()) {
+                final IntegerRange rhs = (IntegerRange) b;
+                if (rhs.getMin() > 0 || rhs.getMax() < 0) { // divisor range must not include 0
+                    final long absmax = Math.max(Math.abs(rhs.getMin()), Math.abs(rhs.getMax())) - 1;
+                    return createIntegerRange(rhs.getMin() > 0 ? 0 : -absmax, rhs.getMax() < 0 ? 0 : +absmax);
+                }
+            }
+            return createTypeRange(Type.NUMBER);
+        }
+
+        /**
+         * Division operation
+         * @param a range of first symbol to the division
+         * @param b range of second symbol to be division
+         * @return resulting range representing the value range after division
+         */
+        public Range div(final Range a, final Range b) {
+            // TODO
+            return createTypeRange(Type.NUMBER);
+        }
+    }
+
+    /**
+     * Simple trace functionality that will log range creation
+     */
+    public static class TraceFunctionality extends Functionality {
+        TraceFunctionality(final DebugLogger log) {
+            super(log);
+        }
+
+        private Range trace(final Range result, final String operation, final Range... operands) {
+            log.fine("range::" + operation + Arrays.toString(operands) + " => " + result);
+            return result;
+        }
+
+        @Override
+        public Range join(final Range a, final Range b) {
+            final Range result = super.join(a, b);
+            if (!a.equals(b)) {
+                trace(result, "join", a, b);
+            }
+            return result;
+        }
+
+        @Override
+        public Range add(final Range a, final Range b) {
+            return trace(super.add(a, b), "add", a, b);
+        }
+
+        @Override
+        public Range sub(final Range a, final Range b) {
+            return trace(super.sub(a, b), "sub", a, b);
+        }
+
+        @Override
+        public Range mul(final Range a, final Range b) {
+            return trace(super.mul(a, b), "mul", a, b);
+        }
+
+        @Override
+        public Range neg(final Range a) {
+            return trace(super.neg(a), "neg", a);
+        }
+
+        @Override
+        public Range and(final Range a, final Range b) {
+            return trace(super.and(a, b), "and", a, b);
+        }
+
+        @Override
+        public Range or(final Range a, final Range b) {
+            return trace(super.or(a, b), "or", a, b);
+        }
+
+        @Override
+        public Range xor(final Range a, final Range b) {
+            return trace(super.xor(a, b), "xor", a, b);
+        }
+
+        @Override
+        public Range shl(final Range a, final Range b) {
+            return trace(super.shl(a, b), "shl", a, b);
+        }
+
+        @Override
+        public Range shr(final Range a, final Range b) {
+            return trace(super.shr(a, b), "shr", a, b);
+        }
+
+        @Override
+        public Range sar(final Range a, final Range b) {
+            return trace(super.sar(a, b), "sar", a, b);
+        }
+
+        @Override
+        public Range mod(final Range a, final Range b) {
+            return trace(super.mod(a, b), "mod", a, b);
+        }
+
+        @Override
+        public Range div(final Range a, final Range b) {
+            return trace(super.div(a, b), "div", a, b);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return String.valueOf(getType());
+    }
+
+    @SuppressWarnings("unused")
+    private static boolean isRepresentableAsInt(final double number) {
+        return (int)number == number && !isNegativeZero(number);
+    }
+
+    private static boolean isRepresentableAsLong(final double number) {
+        return (long)number == number && !isNegativeZero(number);
+    }
+
+    private static boolean isNegativeZero(final double number) {
+        return Double.doubleToLongBits(number) == Double.doubleToLongBits(-0.0);
+    }
+}
diff --git a/src/jdk/nashorn/internal/codegen/types/Type.java b/src/jdk/nashorn/internal/codegen/types/Type.java
index 747793e8..57b0212a 100644
--- a/src/jdk/nashorn/internal/codegen/types/Type.java
+++ b/src/jdk/nashorn/internal/codegen/types/Type.java
@@ -106,23 +106,13 @@ public abstract class Type implements Comparable<Type>, BytecodeOps {
     Type(final String name, final Class<?> clazz, final int weight, final int slots) {
         this.name       = name;
         this.clazz      = clazz;
-        this.descriptor = Type.getDescriptor(clazz);
+        this.descriptor = jdk.internal.org.objectweb.asm.Type.getDescriptor(clazz);
         this.weight     = weight;
         assert weight >= MIN_WEIGHT && weight <= MAX_WEIGHT : "illegal type weight: " + weight;
         this.slots      = slots;
     }
 
     /**
-     * Return an internal descriptor for a type
-     *
-     * @param type the type
-     * @return descriptor string
-     */
-    public static String getDescriptor(final Class<?> type) {
-        return jdk.internal.org.objectweb.asm.Type.getDescriptor(type);
-    }
-
-    /**
      * Get the weight of this type - use this e.g. for sorting method descriptors
      * @return the weight
      */
diff --git a/src/jdk/nashorn/internal/ir/AccessNode.java b/src/jdk/nashorn/internal/ir/AccessNode.java
index 28b09a6c..eecc5713 100644
--- a/src/jdk/nashorn/internal/ir/AccessNode.java
+++ b/src/jdk/nashorn/internal/ir/AccessNode.java
@@ -60,7 +60,7 @@ public final class AccessNode extends BaseNode {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterAccessNode(this)) {
             return visitor.leaveAccessNode(
                 setBase(base.accept(visitor)).
@@ -110,7 +110,6 @@ public final class AccessNode extends BaseNode {
         return new AccessNode(this, base, property, isFunction(), hasCallSiteType());
     }
 
-
     private AccessNode setProperty(final IdentNode property) {
         if (this.property == property) {
             return this;
diff --git a/src/jdk/nashorn/internal/ir/BinaryNode.java b/src/jdk/nashorn/internal/ir/BinaryNode.java
index 61454fef..4afa1945 100644
--- a/src/jdk/nashorn/internal/ir/BinaryNode.java
+++ b/src/jdk/nashorn/internal/ir/BinaryNode.java
@@ -59,6 +59,23 @@ public final class BinaryNode extends Node implements Assignment<Node> {
         this.rhs = rhs;
     }
 
+    @Override
+    public boolean isComparison() {
+        switch (tokenType()) {
+        case EQ:
+        case EQ_STRICT:
+        case NE:
+        case NE_STRICT:
+        case LE:
+        case LT:
+        case GE:
+        case GT:
+            return true;
+        default:
+            return false;
+        }
+    }
+
     /**
      * Return the widest possible type for this operation. This is used for compile time
      * static type inference
@@ -143,7 +160,7 @@ public final class BinaryNode extends Node implements Assignment<Node> {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterBinaryNode(this)) {
             return visitor.leaveBinaryNode(setLHS(lhs.accept(visitor)).setRHS(rhs.accept(visitor)));
         }
diff --git a/src/jdk/nashorn/internal/ir/Block.java b/src/jdk/nashorn/internal/ir/Block.java
index a0fa9372..71692144 100644
--- a/src/jdk/nashorn/internal/ir/Block.java
+++ b/src/jdk/nashorn/internal/ir/Block.java
@@ -131,7 +131,7 @@ public class Block extends BreakableNode implements Flags<Block> {
      * @return new or same node
      */
     @Override
-    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterBlock(this)) {
             return visitor.leaveBlock(setStatements(lc, Node.accept(visitor, Statement.class, statements)));
         }
diff --git a/src/jdk/nashorn/internal/ir/BreakNode.java b/src/jdk/nashorn/internal/ir/BreakNode.java
index f1b9cb98..2b8fbd83 100644
--- a/src/jdk/nashorn/internal/ir/BreakNode.java
+++ b/src/jdk/nashorn/internal/ir/BreakNode.java
@@ -59,7 +59,7 @@ public final class BreakNode extends Statement {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterBreakNode(this)) {
             return visitor.leaveBreakNode(this);
         }
diff --git a/src/jdk/nashorn/internal/ir/CallNode.java b/src/jdk/nashorn/internal/ir/CallNode.java
index 46cf4588..7180d9ce 100644
--- a/src/jdk/nashorn/internal/ir/CallNode.java
+++ b/src/jdk/nashorn/internal/ir/CallNode.java
@@ -27,6 +27,7 @@ package jdk.nashorn.internal.ir;
 
 import java.util.Collections;
 import java.util.List;
+
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.annotations.Ignore;
 import jdk.nashorn.internal.ir.annotations.Immutable;
@@ -194,7 +195,7 @@ public final class CallNode extends LexicalContextNode implements TypeOverride<C
      * @return node or replacement
      */
     @Override
-    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterCallNode(this)) {
             final CallNode newCallNode = (CallNode)visitor.leaveCallNode(
                     setFunction(function.accept(visitor)).
diff --git a/src/jdk/nashorn/internal/ir/CaseNode.java b/src/jdk/nashorn/internal/ir/CaseNode.java
index 8a438f8f..aae370f3 100644
--- a/src/jdk/nashorn/internal/ir/CaseNode.java
+++ b/src/jdk/nashorn/internal/ir/CaseNode.java
@@ -78,7 +78,7 @@ public final class CaseNode extends Node {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterCaseNode(this)) {
             final Node  newTest = test == null ? null : test.accept(visitor);
             final Block newBody = body == null ? null : (Block)body.accept(visitor);
diff --git a/src/jdk/nashorn/internal/ir/CatchNode.java b/src/jdk/nashorn/internal/ir/CatchNode.java
index c4551492..f3818148 100644
--- a/src/jdk/nashorn/internal/ir/CatchNode.java
+++ b/src/jdk/nashorn/internal/ir/CatchNode.java
@@ -42,6 +42,11 @@ public final class CatchNode extends Statement {
     /** Catch body. */
     private final Block body;
 
+    private final int flags;
+
+    /** Is this block a synthethic rethrow created by finally inlining? */
+    public static final int IS_SYNTHETIC_RETHROW = 1;
+
     /**
      * Constructors
      *
@@ -51,19 +56,22 @@ public final class CatchNode extends Statement {
      * @param exception          variable name of exception
      * @param exceptionCondition exception condition
      * @param body               catch body
+     * @param flags              flags
      */
-    public CatchNode(final int lineNumber, final long token, final int finish, final IdentNode exception, final Node exceptionCondition, final Block body) {
+    public CatchNode(final int lineNumber, final long token, final int finish, final IdentNode exception, final Node exceptionCondition, final Block body, final int flags) {
         super(lineNumber, token, finish);
         this.exception          = exception;
         this.exceptionCondition = exceptionCondition;
         this.body               = body;
+        this.flags              = flags;
     }
 
-    private CatchNode(final CatchNode catchNode, final IdentNode exception, final Node exceptionCondition, final Block body) {
+    private CatchNode(final CatchNode catchNode, final IdentNode exception, final Node exceptionCondition, final Block body, final int flags) {
         super(catchNode);
         this.exception          = exception;
         this.exceptionCondition = exceptionCondition;
         this.body               = body;
+        this.flags              = flags;
     }
 
     /**
@@ -71,7 +79,7 @@ public final class CatchNode extends Statement {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterCatchNode(this)) {
             return visitor.leaveCatchNode(
                 setException((IdentNode)exception.accept(visitor)).
@@ -124,7 +132,7 @@ public final class CatchNode extends Statement {
         if (this.exceptionCondition == exceptionCondition) {
             return this;
         }
-        return new CatchNode(this, exception, exceptionCondition, body);
+        return new CatchNode(this, exception, exceptionCondition, body, flags);
     }
 
     /**
@@ -144,13 +152,25 @@ public final class CatchNode extends Statement {
         if (this.exception == exception) {
             return this;
         }
-        return new CatchNode(this, exception, exceptionCondition, body);
+        return new CatchNode(this, exception, exceptionCondition, body, flags);
     }
 
     private CatchNode setBody(final Block body) {
         if (this.body == body) {
             return this;
         }
-        return new CatchNode(this, exception, exceptionCondition, body);
+        return new CatchNode(this, exception, exceptionCondition, body, flags);
     }
+
+    /**
+     * Is this catch block a non-JavaScript constructor, for example created as
+     * part of the rethrow mechanism of a finally block in Lower? Then we just
+     * pass the exception on and need not unwrap whatever is in the ECMAException
+     * object catch symbol
+     * @return true if a finally synthetic rethrow
+     */
+    public boolean isSyntheticRethrow() {
+        return (flags & IS_SYNTHETIC_RETHROW) == IS_SYNTHETIC_RETHROW;
+    }
+
 }
diff --git a/src/jdk/nashorn/internal/ir/ContinueNode.java b/src/jdk/nashorn/internal/ir/ContinueNode.java
index c82813b4..579414a9 100644
--- a/src/jdk/nashorn/internal/ir/ContinueNode.java
+++ b/src/jdk/nashorn/internal/ir/ContinueNode.java
@@ -55,7 +55,7 @@ public class ContinueNode extends Statement {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterContinueNode(this)) {
             return visitor.leaveContinueNode(this);
         }
diff --git a/src/jdk/nashorn/internal/ir/EmptyNode.java b/src/jdk/nashorn/internal/ir/EmptyNode.java
index 9f53a602..aa86f2f8 100644
--- a/src/jdk/nashorn/internal/ir/EmptyNode.java
+++ b/src/jdk/nashorn/internal/ir/EmptyNode.java
@@ -56,7 +56,7 @@ public final class EmptyNode extends Statement {
 
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterEmptyNode(this)) {
             return visitor.leaveEmptyNode(this);
         }
diff --git a/src/jdk/nashorn/internal/ir/ExecuteNode.java b/src/jdk/nashorn/internal/ir/ExecuteNode.java
index 300254dd..c696202b 100644
--- a/src/jdk/nashorn/internal/ir/ExecuteNode.java
+++ b/src/jdk/nashorn/internal/ir/ExecuteNode.java
@@ -62,7 +62,7 @@ public final class ExecuteNode extends Statement {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterExecuteNode(this)) {
             return visitor.leaveExecuteNode(setExpression(expression.accept(visitor)));
         }
diff --git a/src/jdk/nashorn/internal/ir/ForNode.java b/src/jdk/nashorn/internal/ir/ForNode.java
index 3d0ea364..bad38c6a 100644
--- a/src/jdk/nashorn/internal/ir/ForNode.java
+++ b/src/jdk/nashorn/internal/ir/ForNode.java
@@ -86,7 +86,7 @@ public final class ForNode extends LoopNode {
     }
 
     @Override
-    protected Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    protected Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterForNode(this)) {
             return visitor.leaveForNode(
                 setInit(lc, init == null ? null : init.accept(visitor)).
diff --git a/src/jdk/nashorn/internal/ir/FunctionNode.java b/src/jdk/nashorn/internal/ir/FunctionNode.java
index 2b6d19bf..4c5eebb0 100644
--- a/src/jdk/nashorn/internal/ir/FunctionNode.java
+++ b/src/jdk/nashorn/internal/ir/FunctionNode.java
@@ -250,6 +250,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         final FunctionNode functionNode,
         final long lastToken,
         final int flags,
+        final String name,
         final Type returnType,
         final CompileUnit compileUnit,
         final EnumSet<CompilationState> compilationState,
@@ -260,6 +261,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         super(functionNode);
 
         this.flags            = flags;
+        this.name             = name;
         this.returnType       = returnType;
         this.compileUnit      = compileUnit;
         this.lastToken        = lastToken;
@@ -271,7 +273,6 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
 
         // the fields below never change - they are final and assigned in constructor
         this.source          = functionNode.source;
-        this.name            = functionNode.name;
         this.ident           = functionNode.ident;
         this.namespace       = functionNode.namespace;
         this.declaredSymbols = functionNode.declaredSymbols;
@@ -280,7 +281,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
     }
 
     @Override
-    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterFunctionNode(this)) {
             return visitor.leaveFunctionNode(setBody(lc, (Block)body.accept(visitor)));
         }
@@ -315,7 +316,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if (this.snapshot == null) {
             return this;
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, null, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, null, hints));
     }
 
     /**
@@ -331,7 +332,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if (isProgram() || parameters.isEmpty()) {
             return this; //never specialize anything that won't be recompiled
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, this, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, this, hints));
     }
 
     /**
@@ -339,7 +340,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
      * @return true if specialization is possible
      */
     public boolean canSpecialize() {
-        return getFlag(CAN_SPECIALIZE);
+        return snapshot != null && getFlag(CAN_SPECIALIZE);
     }
 
     /**
@@ -389,7 +390,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         }
         final EnumSet<CompilationState> newState = EnumSet.copyOf(this.compilationState);
         newState.add(state);
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, newState, body, parameters, snapshot, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, newState, body, parameters, snapshot, hints));
     }
 
     /**
@@ -410,7 +411,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if (this.hints == hints) {
             return this;
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
     }
 
     /**
@@ -463,7 +464,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if (this.flags == flags) {
             return this;
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
     }
 
     @Override
@@ -529,7 +530,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
     }
 
     /**
-     * Get the identifier for this function
+     * Get the identifier for this function, this is its symbol.
      * @return the identifier as an IdentityNode
      */
     public IdentNode getIdent() {
@@ -572,7 +573,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if(this.body == body) {
             return this;
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
     }
 
     /**
@@ -640,7 +641,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if (this.lastToken == lastToken) {
             return this;
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
     }
 
     /**
@@ -651,6 +652,20 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         return name;
     }
 
+
+    /**
+     * Set the internal name for this function
+     * @param lc    lexical context
+     * @param name new name
+     * @return new function node if changed, otherwise the same
+     */
+    public FunctionNode setName(final LexicalContext lc, final String name) {
+        if (this.name.equals(name)) {
+            return this;
+        }
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
+    }
+
     /**
      * Check if this function should have all its variables in its own scope. Scripts, split sub-functions, and
      * functions having with and/or eval blocks are such.
@@ -698,7 +713,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if (this.parameters == parameters) {
             return this;
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
     }
 
     /**
@@ -762,6 +777,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
                 this,
                 lastToken,
                 flags,
+                name,
                 Type.widest(this.returnType, returnType.isObject() ?
                     Type.OBJECT :
                     returnType),
@@ -801,7 +817,7 @@ public final class FunctionNode extends LexicalContextNode implements Flags<Func
         if (this.compileUnit == compileUnit) {
             return this;
         }
-        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
+        return Node.replaceInLexicalContext(lc, this, new FunctionNode(this, lastToken, flags, name, returnType, compileUnit, compilationState, body, parameters, snapshot, hints));
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/ir/IdentNode.java b/src/jdk/nashorn/internal/ir/IdentNode.java
index 2fb769a9..de197c3c 100644
--- a/src/jdk/nashorn/internal/ir/IdentNode.java
+++ b/src/jdk/nashorn/internal/ir/IdentNode.java
@@ -29,7 +29,6 @@ import static jdk.nashorn.internal.codegen.CompilerConstants.__DIR__;
 import static jdk.nashorn.internal.codegen.CompilerConstants.__FILE__;
 import static jdk.nashorn.internal.codegen.CompilerConstants.__LINE__;
 import static jdk.nashorn.internal.codegen.ObjectClassGenerator.DEBUG_FIELDS;
-
 import jdk.nashorn.internal.codegen.ObjectClassGenerator;
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.annotations.Immutable;
@@ -119,7 +118,7 @@ public final class IdentNode extends Node implements PropertyKey, TypeOverride<I
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterIdentNode(this)) {
             return visitor.leaveIdentNode(this);
         }
diff --git a/src/jdk/nashorn/internal/ir/IfNode.java b/src/jdk/nashorn/internal/ir/IfNode.java
index 7731b302..1b606cb0 100644
--- a/src/jdk/nashorn/internal/ir/IfNode.java
+++ b/src/jdk/nashorn/internal/ir/IfNode.java
@@ -72,7 +72,7 @@ public final class IfNode extends Statement {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterIfNode(this)) {
             return visitor.leaveIfNode(
                 setTest(test.accept(visitor)).
diff --git a/src/jdk/nashorn/internal/ir/IndexNode.java b/src/jdk/nashorn/internal/ir/IndexNode.java
index a22c6179..0a9b7db2 100644
--- a/src/jdk/nashorn/internal/ir/IndexNode.java
+++ b/src/jdk/nashorn/internal/ir/IndexNode.java
@@ -56,19 +56,12 @@ public final class IndexNode extends BaseNode {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterIndexNode(this)) {
-            final Node      newBase  = base.accept(visitor);
-            final Node      newIndex = index.accept(visitor);
-            final IndexNode newNode;
-            if (newBase != base || newIndex != index) {
-                newNode = new IndexNode(this, newBase, newIndex, isFunction(), hasCallSiteType());
-            } else {
-                newNode = this;
-            }
-            return visitor.leaveIndexNode(newNode);
+            return visitor.leaveIndexNode(
+                setBase(base.accept(visitor)).
+                setIndex(index.accept(visitor)));
         }
-
         return this;
     }
 
@@ -106,6 +99,13 @@ public final class IndexNode extends BaseNode {
         return index;
     }
 
+    private IndexNode setBase(final Node base) {
+        if (this.base == base) {
+            return this;
+        }
+        return new IndexNode(this, base, index, isFunction(), hasCallSiteType());
+    }
+
     /**
      * Set the index expression for this node
      * @param index new index expression
diff --git a/src/jdk/nashorn/internal/ir/LabelNode.java b/src/jdk/nashorn/internal/ir/LabelNode.java
index d791f3fa..ad9979ef 100644
--- a/src/jdk/nashorn/internal/ir/LabelNode.java
+++ b/src/jdk/nashorn/internal/ir/LabelNode.java
@@ -67,11 +67,11 @@ public final class LabelNode extends LexicalContextNode {
     }
 
     @Override
-    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterLabelNode(this)) {
             return visitor.leaveLabelNode(
-                setLabel(visitor.getLexicalContext(), (IdentNode)label.accept(visitor)).
-                setBody(visitor.getLexicalContext(), (Block)body.accept(visitor)));
+                setLabel(lc, (IdentNode)label.accept(visitor)).
+                setBody(lc, (Block)body.accept(visitor)));
         }
 
         return this;
diff --git a/src/jdk/nashorn/internal/ir/LexicalContext.java b/src/jdk/nashorn/internal/ir/LexicalContext.java
index 13eb0aa8..2ca5ec39 100644
--- a/src/jdk/nashorn/internal/ir/LexicalContext.java
+++ b/src/jdk/nashorn/internal/ir/LexicalContext.java
@@ -440,6 +440,23 @@ public class LexicalContext {
     }
 
     /**
+     * Check whether the lexical context is currently inside a loop
+     * @return true if inside a loop
+     */
+    public boolean inLoop() {
+        return getCurrentLoop() != null;
+    }
+
+    /**
+     * Returns the loop header of the current loop, or null if not inside a loop
+     * @return loop header
+     */
+    public LoopNode getCurrentLoop() {
+        final Iterator<LoopNode> iter = new NodeIterator<>(LoopNode.class, getCurrentFunction());
+        return iter.hasNext() ? iter.next() : null;
+    }
+
+    /**
      * Find the breakable node corresponding to this label.
      * @param label label to search for, if null the closest breakable node will be returned unconditionally, e.g. a while loop with no label
      * @return closest breakable node
@@ -461,8 +478,7 @@ public class LexicalContext {
     }
 
     private LoopNode getContinueTo() {
-        final Iterator<LoopNode> iter = new NodeIterator<>(LoopNode.class, getCurrentFunction());
-        return iter.hasNext() ? iter.next() : null;
+        return getCurrentLoop();
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/ir/LexicalContextNode.java b/src/jdk/nashorn/internal/ir/LexicalContextNode.java
index 52f62f09..020faf8e 100644
--- a/src/jdk/nashorn/internal/ir/LexicalContextNode.java
+++ b/src/jdk/nashorn/internal/ir/LexicalContextNode.java
@@ -60,10 +60,10 @@ public abstract class LexicalContextNode extends Statement {
      *
      * @return new node or same node depending on state change
      */
-    protected abstract Node accept(final LexicalContext lc, final NodeVisitor visitor);
+    protected abstract Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor);
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         final LexicalContext lc = visitor.getLexicalContext();
         lc.push(this);
         final LexicalContextNode newNode = (LexicalContextNode)accept(lc, visitor);
diff --git a/src/jdk/nashorn/internal/ir/LiteralNode.java b/src/jdk/nashorn/internal/ir/LiteralNode.java
index 4c2f932c..7a59c5fe 100644
--- a/src/jdk/nashorn/internal/ir/LiteralNode.java
+++ b/src/jdk/nashorn/internal/ir/LiteralNode.java
@@ -28,6 +28,7 @@ package jdk.nashorn.internal.ir;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+
 import jdk.nashorn.internal.codegen.CompileUnit;
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.annotations.Immutable;
@@ -208,7 +209,7 @@ public abstract class LiteralNode<T> extends Node implements PropertyKey {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterLiteralNode(this)) {
             return visitor.leaveLiteralNode(this);
         }
@@ -514,7 +515,7 @@ public abstract class LiteralNode<T> extends Node implements PropertyKey {
         }
 
         @Override
-        public Node accept(final NodeVisitor visitor) {
+        public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
             if (visitor.enterLiteralNode(this)) {
                 if (value != null) {
                     final Node newValue = value.accept(visitor);
@@ -840,7 +841,7 @@ public abstract class LiteralNode<T> extends Node implements PropertyKey {
         }
 
         @Override
-        public Node accept(final NodeVisitor visitor) {
+        public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
             if (visitor.enterLiteralNode(this)) {
                 final List<Node> oldValue = Arrays.asList(value);
                 final List<Node> newValue = Node.accept(visitor, Node.class, oldValue);
diff --git a/src/jdk/nashorn/internal/ir/Node.java b/src/jdk/nashorn/internal/ir/Node.java
index 0fb95cc3..4342c2be 100644
--- a/src/jdk/nashorn/internal/ir/Node.java
+++ b/src/jdk/nashorn/internal/ir/Node.java
@@ -27,6 +27,7 @@ package jdk.nashorn.internal.ir;
 
 import java.util.ArrayList;
 import java.util.List;
+
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
 import jdk.nashorn.internal.parser.Token;
@@ -153,6 +154,14 @@ public abstract class Node implements Cloneable {
     }
 
     /**
+     * Returns true if this node represents a comparison operator
+     * @return true if comparison
+     */
+    public boolean isComparison() {
+        return false;
+    }
+
+    /**
      * For reference copies - ensure that labels in the copy node are unique
      * using an appropriate copy constructor
      * @param lc lexical context
@@ -167,7 +176,7 @@ public abstract class Node implements Cloneable {
      * @param visitor Node visitor.
      * @return node the node or its replacement after visitation, null if no further visitations are required
      */
-    public abstract Node accept(NodeVisitor visitor);
+    public abstract Node accept(NodeVisitor<? extends LexicalContext> visitor);
 
     @Override
     public String toString() {
@@ -329,7 +338,7 @@ public abstract class Node implements Cloneable {
     }
 
     //on change, we have to replace the entire list, that's we can't simple do ListIterator.set
-    static <T extends Node> List<T> accept(final NodeVisitor visitor, final Class<T> clazz, final List<T> list) {
+    static <T extends Node> List<T> accept(final NodeVisitor<? extends LexicalContext> visitor, final Class<T> clazz, final List<T> list) {
         boolean changed = false;
         final List<T> newList = new ArrayList<>();
 
diff --git a/src/jdk/nashorn/internal/ir/ObjectNode.java b/src/jdk/nashorn/internal/ir/ObjectNode.java
index 34069725..8529a1fe 100644
--- a/src/jdk/nashorn/internal/ir/ObjectNode.java
+++ b/src/jdk/nashorn/internal/ir/ObjectNode.java
@@ -58,7 +58,7 @@ public final class ObjectNode extends Node {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterObjectNode(this)) {
             return visitor.leaveObjectNode(setElements(Node.accept(visitor, Node.class, elements)));
         }
diff --git a/src/jdk/nashorn/internal/ir/PropertyNode.java b/src/jdk/nashorn/internal/ir/PropertyNode.java
index 7040d414..8bf6b80f 100644
--- a/src/jdk/nashorn/internal/ir/PropertyNode.java
+++ b/src/jdk/nashorn/internal/ir/PropertyNode.java
@@ -81,7 +81,7 @@ public final class PropertyNode extends Node {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterPropertyNode(this)) {
             return visitor.leavePropertyNode(
                 setKey((PropertyKey)((Node)key).accept(visitor)).
diff --git a/src/jdk/nashorn/internal/ir/ReturnNode.java b/src/jdk/nashorn/internal/ir/ReturnNode.java
index c0091eb4..563d0519 100644
--- a/src/jdk/nashorn/internal/ir/ReturnNode.java
+++ b/src/jdk/nashorn/internal/ir/ReturnNode.java
@@ -86,7 +86,7 @@ public class ReturnNode extends Statement {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterReturnNode(this)) {
             if (expression != null) {
                 return visitor.leaveReturnNode(setExpression(expression.accept(visitor)));
diff --git a/src/jdk/nashorn/internal/ir/RuntimeNode.java b/src/jdk/nashorn/internal/ir/RuntimeNode.java
index 47509be1..540b2eaf 100644
--- a/src/jdk/nashorn/internal/ir/RuntimeNode.java
+++ b/src/jdk/nashorn/internal/ir/RuntimeNode.java
@@ -29,6 +29,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.annotations.Immutable;
 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
@@ -407,7 +408,7 @@ public class RuntimeNode extends Node implements TypeOverride<RuntimeNode> {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterRuntimeNode(this)) {
             final List<Node> newArgs = new ArrayList<>();
             for (final Node arg : args) {
diff --git a/src/jdk/nashorn/internal/ir/SplitNode.java b/src/jdk/nashorn/internal/ir/SplitNode.java
index ee6e023c..e71cd6bd 100644
--- a/src/jdk/nashorn/internal/ir/SplitNode.java
+++ b/src/jdk/nashorn/internal/ir/SplitNode.java
@@ -81,7 +81,7 @@ public class SplitNode extends LexicalContextNode {
     }
 
     @Override
-    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterSplitNode(this)) {
             return visitor.leaveSplitNode(setBody(lc, body.accept(visitor)));
         }
diff --git a/src/jdk/nashorn/internal/ir/SwitchNode.java b/src/jdk/nashorn/internal/ir/SwitchNode.java
index bfc03108..3790ad51 100644
--- a/src/jdk/nashorn/internal/ir/SwitchNode.java
+++ b/src/jdk/nashorn/internal/ir/SwitchNode.java
@@ -100,11 +100,11 @@ public final class SwitchNode extends BreakableNode {
     }
 
     @Override
-    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterSwitchNode(this)) {
             return visitor.leaveSwitchNode(
-                setExpression(visitor.getLexicalContext(), expression.accept(visitor)).
-                setCases(visitor.getLexicalContext(), Node.accept(visitor, CaseNode.class, cases), defaultCaseIndex));
+                setExpression(lc, expression.accept(visitor)).
+                setCases(lc, Node.accept(visitor, CaseNode.class, cases), defaultCaseIndex));
         }
 
         return this;
diff --git a/src/jdk/nashorn/internal/ir/Symbol.java b/src/jdk/nashorn/internal/ir/Symbol.java
index 05495152..d26fe561 100644
--- a/src/jdk/nashorn/internal/ir/Symbol.java
+++ b/src/jdk/nashorn/internal/ir/Symbol.java
@@ -29,6 +29,8 @@ import java.io.PrintWriter;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.StringTokenizer;
+
+import jdk.nashorn.internal.codegen.types.Range;
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.runtime.Context;
 import jdk.nashorn.internal.runtime.Debug;
@@ -89,6 +91,9 @@ public final class Symbol implements Comparable<Symbol> {
     /** Number of times this symbol is used in code */
     private int useCount;
 
+    /** Range for symbol */
+    private Range range;
+
     /** Debugging option - dump info and stack trace when symbols with given names are manipulated */
     private static final Set<String> TRACE_SYMBOLS;
     private static final Set<String> TRACE_SYMBOLS_STACKTRACE;
@@ -131,6 +136,7 @@ public final class Symbol implements Comparable<Symbol> {
         this.type       = type;
         this.slot       = slot;
         this.fieldIndex = -1;
+        this.range      = Range.createUnknownRange();
         trace("CREATE SYMBOL");
     }
 
@@ -157,12 +163,13 @@ public final class Symbol implements Comparable<Symbol> {
 
     private Symbol(final Symbol base, final String name, final int flags) {
         this.flags = flags;
-        this.name = name;
+        this.name  = name;
 
         this.fieldIndex = base.fieldIndex;
-        this.slot = base.slot;
-        this.type = base.type;
-        this.useCount = base.useCount;
+        this.slot       = base.slot;
+        this.type       = base.type;
+        this.useCount   = base.useCount;
+        this.range      = base.range;
     }
 
     private static String align(final String string, final int max) {
@@ -276,7 +283,7 @@ public final class Symbol implements Comparable<Symbol> {
 
     @Override
     public String toString() {
-        final StringBuilder sb   = new StringBuilder();
+        final StringBuilder sb = new StringBuilder();
 
         sb.append(name).
             append(' ').
@@ -410,6 +417,22 @@ public final class Symbol implements Comparable<Symbol> {
     }
 
     /**
+     * Get the range for this symbol
+     * @return range for symbol
+     */
+    public Range getRange() {
+        return range;
+    }
+
+    /**
+     * Set the range for this symbol
+     * @param range range
+     */
+    public void setRange(final Range range) {
+        this.range = range;
+    }
+
+    /**
      * Check if this symbol is a function parameter of known
      * narrowest type
      * @return true if parameter
diff --git a/src/jdk/nashorn/internal/ir/TernaryNode.java b/src/jdk/nashorn/internal/ir/TernaryNode.java
index 25ac1a4d..c05e6245 100644
--- a/src/jdk/nashorn/internal/ir/TernaryNode.java
+++ b/src/jdk/nashorn/internal/ir/TernaryNode.java
@@ -63,7 +63,7 @@ public final class TernaryNode extends Node {
     }
 
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterTernaryNode(this)) {
             final Node newLhs = lhs().accept(visitor);
             final Node newRhs = rhs().accept(visitor);
diff --git a/src/jdk/nashorn/internal/ir/ThrowNode.java b/src/jdk/nashorn/internal/ir/ThrowNode.java
index e37302e6..3d33fc77 100644
--- a/src/jdk/nashorn/internal/ir/ThrowNode.java
+++ b/src/jdk/nashorn/internal/ir/ThrowNode.java
@@ -36,6 +36,11 @@ public final class ThrowNode extends Statement {
     /** Exception expression. */
     private final Node expression;
 
+    private final int flags;
+
+    /** Is this block a synthethic rethrow created by finally inlining? */
+    public static final int IS_SYNTHETIC_RETHROW = 1;
+
     /**
      * Constructor
      *
@@ -43,15 +48,18 @@ public final class ThrowNode extends Statement {
      * @param token      token
      * @param finish     finish
      * @param expression expression to throw
+     * @param flags      flags
      */
-    public ThrowNode(final int lineNumber, final long token, final int finish, final Node expression) {
+    public ThrowNode(final int lineNumber, final long token, final int finish, final Node expression, final int flags) {
         super(lineNumber, token, finish);
         this.expression = expression;
+        this.flags = flags;
     }
 
-    private ThrowNode(final ThrowNode node, final Node expression) {
+    private ThrowNode(final ThrowNode node, final Node expression, final int flags) {
         super(node);
         this.expression = expression;
+        this.flags = flags;
     }
 
     @Override
@@ -64,7 +72,7 @@ public final class ThrowNode extends Statement {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterThrowNode(this)) {
             return visitor.leaveThrowNode(setExpression(expression.accept(visitor)));
         }
@@ -98,7 +106,17 @@ public final class ThrowNode extends Statement {
         if (this.expression == expression) {
             return this;
         }
-        return new ThrowNode(this, expression);
+        return new ThrowNode(this, expression, flags);
+    }
+
+    /**
+     * Is this a throw a synthetic rethrow in a synthetic catch-all block
+     * created when inlining finally statements? In that case we never
+     * wrap whatever is thrown into an ECMAException, just rethrow it.
+     * @return true if synthetic throw node
+     */
+    public boolean isSyntheticRethrow() {
+        return (flags & IS_SYNTHETIC_RETHROW) == IS_SYNTHETIC_RETHROW;
     }
 
 }
diff --git a/src/jdk/nashorn/internal/ir/TryNode.java b/src/jdk/nashorn/internal/ir/TryNode.java
index 01ea75c7..6c30118e 100644
--- a/src/jdk/nashorn/internal/ir/TryNode.java
+++ b/src/jdk/nashorn/internal/ir/TryNode.java
@@ -106,7 +106,7 @@ public final class TryNode extends Statement {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterTryNode(this)) {
             // Need to do finallybody first for termination analysis. TODO still necessary?
             final Block newFinallyBody = finallyBody == null ? null : (Block)finallyBody.accept(visitor);
diff --git a/src/jdk/nashorn/internal/ir/UnaryNode.java b/src/jdk/nashorn/internal/ir/UnaryNode.java
index ed1d8a9b..f9c971ed 100644
--- a/src/jdk/nashorn/internal/ir/UnaryNode.java
+++ b/src/jdk/nashorn/internal/ir/UnaryNode.java
@@ -29,7 +29,6 @@ import static jdk.nashorn.internal.parser.TokenType.BIT_NOT;
 import static jdk.nashorn.internal.parser.TokenType.CONVERT;
 import static jdk.nashorn.internal.parser.TokenType.DECPOSTFIX;
 import static jdk.nashorn.internal.parser.TokenType.INCPOSTFIX;
-
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.annotations.Immutable;
 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
@@ -121,7 +120,7 @@ public final class UnaryNode extends Node implements Assignment<Node> {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterUnaryNode(this)) {
             return visitor.leaveUnaryNode(setRHS(rhs.accept(visitor)));
         }
diff --git a/src/jdk/nashorn/internal/ir/VarNode.java b/src/jdk/nashorn/internal/ir/VarNode.java
index c28f5456..d4f41d6d 100644
--- a/src/jdk/nashorn/internal/ir/VarNode.java
+++ b/src/jdk/nashorn/internal/ir/VarNode.java
@@ -121,7 +121,7 @@ public final class VarNode extends Statement implements Assignment<IdentNode> {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final NodeVisitor visitor) {
+    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterVarNode(this)) {
             final IdentNode newName = (IdentNode)name.accept(visitor);
             final Node      newInit = init == null ? null : init.accept(visitor);
diff --git a/src/jdk/nashorn/internal/ir/WhileNode.java b/src/jdk/nashorn/internal/ir/WhileNode.java
index c52209fc..c2d05b3d 100644
--- a/src/jdk/nashorn/internal/ir/WhileNode.java
+++ b/src/jdk/nashorn/internal/ir/WhileNode.java
@@ -75,7 +75,7 @@ public final class WhileNode extends LoopNode {
     }
 
     @Override
-    protected Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    protected Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterWhileNode(this)) {
             if (isDoWhile()) {
                 return visitor.leaveWhileNode(
diff --git a/src/jdk/nashorn/internal/ir/WithNode.java b/src/jdk/nashorn/internal/ir/WithNode.java
index e069ff5e..387659b2 100644
--- a/src/jdk/nashorn/internal/ir/WithNode.java
+++ b/src/jdk/nashorn/internal/ir/WithNode.java
@@ -64,7 +64,7 @@ public final class WithNode extends LexicalContextNode {
      * @param visitor IR navigating visitor.
      */
     @Override
-    public Node accept(final LexicalContext lc, final NodeVisitor visitor) {
+    public Node accept(final LexicalContext lc, final NodeVisitor<? extends LexicalContext> visitor) {
         if (visitor.enterWithNode(this)) {
              return visitor.leaveWithNode(
                 setExpression(lc, expression.accept(visitor)).
diff --git a/src/jdk/nashorn/internal/ir/debug/JSONWriter.java b/src/jdk/nashorn/internal/ir/debug/JSONWriter.java
index 177fcf95..4415ebd7 100644
--- a/src/jdk/nashorn/internal/ir/debug/JSONWriter.java
+++ b/src/jdk/nashorn/internal/ir/debug/JSONWriter.java
@@ -45,6 +45,7 @@ import jdk.nashorn.internal.ir.IdentNode;
 import jdk.nashorn.internal.ir.IfNode;
 import jdk.nashorn.internal.ir.IndexNode;
 import jdk.nashorn.internal.ir.LabelNode;
+import jdk.nashorn.internal.ir.LexicalContext;
 import jdk.nashorn.internal.ir.LiteralNode;
 import jdk.nashorn.internal.ir.Node;
 import jdk.nashorn.internal.ir.ObjectNode;
@@ -74,7 +75,8 @@ import jdk.nashorn.internal.runtime.Source;
 /**
  * This IR writer produces a JSON string that represents AST as a JSON string.
  */
-public final class JSONWriter extends NodeVisitor {
+public final class JSONWriter extends NodeVisitor<LexicalContext> {
+
     /**
      * Returns AST as JSON compatible string.
      *
@@ -867,7 +869,8 @@ public final class JSONWriter extends NodeVisitor {
     // Internals below
 
     private JSONWriter(final boolean includeLocation) {
-        this.buf = new StringBuilder();
+        super(new LexicalContext());
+        this.buf             = new StringBuilder();
         this.includeLocation = includeLocation;
     }
 
@@ -963,7 +966,7 @@ public final class JSONWriter extends NodeVisitor {
             objectStart("loc");
 
             // source name
-            final Source src = getLexicalContext().getCurrentFunction().getSource();
+            final Source src = lc.getCurrentFunction().getSource();
             property("source", src.getName());
             comma();
 
diff --git a/src/jdk/nashorn/internal/ir/debug/PrintVisitor.java b/src/jdk/nashorn/internal/ir/debug/PrintVisitor.java
index 3ac50067..2e2368b1 100644
--- a/src/jdk/nashorn/internal/ir/debug/PrintVisitor.java
+++ b/src/jdk/nashorn/internal/ir/debug/PrintVisitor.java
@@ -36,6 +36,7 @@ import jdk.nashorn.internal.ir.ForNode;
 import jdk.nashorn.internal.ir.FunctionNode;
 import jdk.nashorn.internal.ir.IfNode;
 import jdk.nashorn.internal.ir.LabelNode;
+import jdk.nashorn.internal.ir.LexicalContext;
 import jdk.nashorn.internal.ir.Node;
 import jdk.nashorn.internal.ir.SplitNode;
 import jdk.nashorn.internal.ir.Statement;
@@ -53,7 +54,7 @@ import jdk.nashorn.internal.ir.visitor.NodeVisitor;
  *
  * see the flags --print-parse and --print-lower-parse
  */
-public final class PrintVisitor extends NodeVisitor {
+public final class PrintVisitor extends NodeVisitor<LexicalContext> {
     /** Tab width */
     private static final int TABWIDTH = 4;
 
@@ -84,6 +85,7 @@ public final class PrintVisitor extends NodeVisitor {
      * @param printLineNumbers  should line number nodes be included in the output?
      */
     public PrintVisitor(final boolean printLineNumbers) {
+        super(new LexicalContext());
         this.EOLN             = System.lineSeparator();
         this.sb               = new StringBuilder();
         this.printLineNumbers = printLineNumbers;
diff --git a/src/jdk/nashorn/internal/ir/visitor/NodeOperatorVisitor.java b/src/jdk/nashorn/internal/ir/visitor/NodeOperatorVisitor.java
index 2beba46c..1791f92b 100644
--- a/src/jdk/nashorn/internal/ir/visitor/NodeOperatorVisitor.java
+++ b/src/jdk/nashorn/internal/ir/visitor/NodeOperatorVisitor.java
@@ -32,21 +32,15 @@ import jdk.nashorn.internal.ir.UnaryNode;
 
 /**
  * Like NodeVisitor but navigating further into operators.
+ * @param <T> Lexical context class for this NodeOperatorVisitor
  */
-public class NodeOperatorVisitor extends NodeVisitor {
-    /**
-     * Constructor
-     */
-    public NodeOperatorVisitor() {
-        super();
-    }
-
+public class NodeOperatorVisitor<T extends LexicalContext> extends NodeVisitor<T> {
     /**
      * Constructor
      *
      * @param lc a custom lexical context
      */
-    public NodeOperatorVisitor(final LexicalContext lc) {
+    public NodeOperatorVisitor(final T lc) {
         super(lc);
     }
 
diff --git a/src/jdk/nashorn/internal/ir/visitor/NodeVisitor.java b/src/jdk/nashorn/internal/ir/visitor/NodeVisitor.java
index 8c807df7..d8a21a64 100644
--- a/src/jdk/nashorn/internal/ir/visitor/NodeVisitor.java
+++ b/src/jdk/nashorn/internal/ir/visitor/NodeVisitor.java
@@ -60,23 +60,18 @@ import jdk.nashorn.internal.ir.WithNode;
 
 /**
  * Visitor used to navigate the IR.
+ * @param <T> lexical context class used by this visitor
  */
-public abstract class NodeVisitor {
-    private final LexicalContext lc;
-
-    /**
-     * Constructor
-     */
-    public NodeVisitor() {
-        this(new LexicalContext());
-    }
+public abstract class NodeVisitor<T extends LexicalContext> {
+    /** lexical context in use */
+    protected final T lc;
 
     /**
      * Constructor
      *
      * @param lc a custom lexical context
      */
-    public NodeVisitor(final LexicalContext lc) {
+    public NodeVisitor(final T lc) {
         this.lc = lc;
     }
 
@@ -84,7 +79,7 @@ public abstract class NodeVisitor {
      * Get the lexical context of this node visitor
      * @return lexical context
      */
-    public LexicalContext getLexicalContext() {
+    public T getLexicalContext() {
         return lc;
     }
 
diff --git a/src/jdk/nashorn/internal/objects/ArrayBufferView.java b/src/jdk/nashorn/internal/objects/ArrayBufferView.java
index a442a387..d85b31cb 100644
--- a/src/jdk/nashorn/internal/objects/ArrayBufferView.java
+++ b/src/jdk/nashorn/internal/objects/ArrayBufferView.java
@@ -59,11 +59,6 @@ abstract class ArrayBufferView extends ScriptObject {
     }
 
     @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)
-    public static Object BYTES_PER_ELEMENT(final Object self) {
-        return ((ArrayBufferView)self).bytesPerElement();
-    }
-
-    @Getter(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE)
     public static Object buffer(final Object self) {
         return ((ArrayDataImpl)((ArrayBufferView)self).getArray()).buffer;
     }
diff --git a/src/jdk/nashorn/internal/objects/DateParser.java b/src/jdk/nashorn/internal/objects/DateParser.java
index 544525b1..b66d3dc9 100644
--- a/src/jdk/nashorn/internal/objects/DateParser.java
+++ b/src/jdk/nashorn/internal/objects/DateParser.java
@@ -32,6 +32,7 @@ import static java.lang.Character.SPACE_SEPARATOR;
 import static java.lang.Character.UPPERCASE_LETTER;
 
 import java.util.HashMap;
+import java.util.Locale;
 
 /**
  * JavaScript date parser. This class first tries to parse a date string
@@ -486,7 +487,7 @@ public class DateParser {
         while (pos < limit && isAsciiLetter(string.charAt(pos))) {
             pos++;
         }
-        final String key = string.substring(start, pos).toLowerCase();
+        final String key = string.substring(start, pos).toLowerCase(Locale.ENGLISH);
         final Name name = names.get(key);
         // then advance to end of name
         while (pos < length && isAsciiLetter(string.charAt(pos))) {
@@ -683,7 +684,7 @@ public class DateParser {
 
         Name(final String name, final int type, final int value) {
             assert name != null;
-            assert name.equals(name.toLowerCase());
+            assert name.equals(name.toLowerCase(Locale.ENGLISH));
 
             this.name = name;
             // use first three characters as lookup key
diff --git a/src/jdk/nashorn/internal/objects/NativeArguments.java b/src/jdk/nashorn/internal/objects/NativeArguments.java
index afc2b57e..efab674b 100644
--- a/src/jdk/nashorn/internal/objects/NativeArguments.java
+++ b/src/jdk/nashorn/internal/objects/NativeArguments.java
@@ -603,6 +603,11 @@ public final class NativeArguments extends ScriptObject {
         }
     }
 
+    @Override
+    public Object getLength() {
+        return length;
+    }
+
     private Object getArgumentsLength() {
         return length;
     }
diff --git a/src/jdk/nashorn/internal/objects/NativeArray.java b/src/jdk/nashorn/internal/objects/NativeArray.java
index c9a71b57..6f9fbcec 100644
--- a/src/jdk/nashorn/internal/objects/NativeArray.java
+++ b/src/jdk/nashorn/internal/objects/NativeArray.java
@@ -754,25 +754,11 @@ public final class NativeArray extends ScriptObject {
         final Object       obj                 = Global.toObject(self);
         final ScriptObject sobj                = (ScriptObject)obj;
         final long         len                 = JSType.toUint32(sobj.getLength());
-        final double       startNum            = JSType.toNumber(start);
-        final long         relativeStartUint32 = JSType.toUint32(startNum);
-        final long         relativeStart       = JSType.toInteger(startNum);
-
-        long k = relativeStart < 0 ?
-                Math.max(len + relativeStart, 0) :
-                Math.min(
-                    Math.max(relativeStartUint32, relativeStart),
-                    len);
-
-        final double endNum = (end == ScriptRuntime.UNDEFINED)? Double.NaN : JSType.toNumber(end);
-        final long relativeEndUint32 = (end == ScriptRuntime.UNDEFINED)? len : JSType.toUint32(endNum);
-        final long relativeEnd       = (end == ScriptRuntime.UNDEFINED)? len : JSType.toInteger(endNum);
-
-        final long finale = relativeEnd < 0 ?
-                Math.max(len + relativeEnd, 0) :
-                Math.min(
-                    Math.max(relativeEndUint32, relativeEnd),
-                    len);
+        final long         relativeStart       = JSType.toLong(start);
+        final long         relativeEnd         = (end == ScriptRuntime.UNDEFINED) ? len : JSType.toLong(end);
+
+        long k = relativeStart < 0 ? Math.max(len + relativeStart, 0) : Math.min(relativeStart, len);
+        final long finale = relativeEnd < 0 ? Math.max(len + relativeEnd, 0) : Math.min(relativeEnd, len);
 
         if (k >= finale) {
             return new NativeArray(0);
@@ -909,21 +895,10 @@ public final class NativeArray extends ScriptObject {
         final ScriptObject sobj                = (ScriptObject)obj;
         final boolean      strict              = Global.isStrict();
         final long         len                 = JSType.toUint32(sobj.getLength());
-        final double       startNum            = JSType.toNumber(start);
-        final long         relativeStartUint32 = JSType.toUint32(startNum);
-        final long         relativeStart       = JSType.toInteger(startNum);
-
-        //TODO: workaround overflow of relativeStart for start > Integer.MAX_VALUE
-        final long actualStart = relativeStart < 0 ?
-            Math.max(len + relativeStart, 0) :
-            Math.min(
-                Math.max(relativeStartUint32, relativeStart),
-                len);
-
-        final long actualDeleteCount =
-            Math.min(
-                Math.max(JSType.toInteger(deleteCount), 0),
-                len - actualStart);
+        final long         relativeStart       = JSType.toLong(start);
+
+        final long actualStart = relativeStart < 0 ? Math.max(len + relativeStart, 0) : Math.min(relativeStart, len);
+        final long actualDeleteCount = Math.min(Math.max(JSType.toLong(deleteCount), 0), len - actualStart);
 
         final NativeArray array = new NativeArray(actualDeleteCount);
 
diff --git a/src/jdk/nashorn/internal/objects/NativeDate.java b/src/jdk/nashorn/internal/objects/NativeDate.java
index c97514a3..fa2c9d17 100644
--- a/src/jdk/nashorn/internal/objects/NativeDate.java
+++ b/src/jdk/nashorn/internal/objects/NativeDate.java
@@ -770,7 +770,7 @@ public final class NativeDate extends ScriptObject {
             nd.setTime(NaN);
             return nd.getTime();
         }
-        int yearInt = JSType.toInteger(yearNum);
+        int yearInt = (int)yearNum;
         if (0 <= yearInt && yearInt <= 99) {
             yearInt += 1900;
         }
diff --git a/src/jdk/nashorn/internal/objects/NativeFloat32Array.java b/src/jdk/nashorn/internal/objects/NativeFloat32Array.java
index 98db34ba..d59a4d6f 100644
--- a/src/jdk/nashorn/internal/objects/NativeFloat32Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeFloat32Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
@@ -38,7 +40,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Float32Array")
 public final class NativeFloat32Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 4;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 4;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeFloat64Array.java b/src/jdk/nashorn/internal/objects/NativeFloat64Array.java
index e2ce6247..0f10a867 100644
--- a/src/jdk/nashorn/internal/objects/NativeFloat64Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeFloat64Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
@@ -38,7 +40,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Float64Array")
 public final class NativeFloat64Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 8;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 8;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeInt16Array.java b/src/jdk/nashorn/internal/objects/NativeInt16Array.java
index c5951d91..d6c5349e 100644
--- a/src/jdk/nashorn/internal/objects/NativeInt16Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeInt16Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 
@@ -37,7 +39,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Int16Array")
 public final class NativeInt16Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 2;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 2;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeInt32Array.java b/src/jdk/nashorn/internal/objects/NativeInt32Array.java
index 486e7a61..a814eb61 100644
--- a/src/jdk/nashorn/internal/objects/NativeInt32Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeInt32Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 
@@ -37,7 +39,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Int32Array")
 public final class NativeInt32Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 4;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 4;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeInt8Array.java b/src/jdk/nashorn/internal/objects/NativeInt8Array.java
index 9ad7d24c..ec43bfc8 100644
--- a/src/jdk/nashorn/internal/objects/NativeInt8Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeInt8Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 
@@ -37,7 +39,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Int8Array")
 public final class NativeInt8Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 1;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 1;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeJava.java b/src/jdk/nashorn/internal/objects/NativeJava.java
index 5faec5ea..207be979 100644
--- a/src/jdk/nashorn/internal/objects/NativeJava.java
+++ b/src/jdk/nashorn/internal/objects/NativeJava.java
@@ -30,6 +30,8 @@ import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
 
 import java.lang.reflect.Array;
 import java.util.Collection;
+import java.util.Deque;
+import java.util.List;
 import jdk.internal.dynalink.beans.StaticClass;
 import jdk.internal.dynalink.support.TypeUtilities;
 import jdk.nashorn.internal.objects.annotations.Attribute;
@@ -37,6 +39,7 @@ import jdk.nashorn.internal.objects.annotations.Function;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
 import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.JSType;
+import jdk.nashorn.internal.runtime.ListAdapter;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.linker.JavaAdapterFactory;
 
@@ -240,39 +243,56 @@ public final class NativeJava {
     }
 
     /**
-     * Given a JavaScript array and a Java type, returns a Java array with the same initial contents, and with the
-     * specified component type. Example:
+     * Given a script object and a Java type, converts the script object into the desired Java type. Currently it
+     * performs shallow creation of Java arrays, as well as wrapping of objects in Lists and Dequeues. Example:
      * <pre>
      * var anArray = [1, "13", false]
-     * var javaIntArray = Java.toJavaArray(anArray, "int")
+     * var javaIntArray = Java.to(anArray, "int[]")
      * print(javaIntArray[0]) // prints 1
      * print(javaIntArray[1]) // prints 13, as string "13" was converted to number 13 as per ECMAScript ToNumber conversion
      * print(javaIntArray[2]) // prints 0, as boolean false was converted to number 0 as per ECMAScript ToNumber conversion
      * </pre>
      * @param self not used
-     * @param objArray the JavaScript array. Can be null.
-     * @param objType either a {@link #type(Object, Object) type object} or a String describing the component type of
-     * the Java array to create. Can not be null. If undefined, Object is assumed (allowing the argument to be omitted).
-     * @return a Java array with the copy of JavaScript array's contents, converted to the appropriate Java component
-     * type. Returns null if objArray is null.
+     * @param obj the script object. Can be null.
+     * @param objType either a {@link #type(Object, Object) type object} or a String describing the type of the Java
+     * object to create. Can not be null. If undefined, a "default" conversion is presumed (allowing the argument to be
+     * omitted).
+     * @return a Java object whose value corresponds to the original script object's value. Specifically, for array
+     * target types, returns a Java array of the same type with contents converted to the array's component type. Does
+     * not recursively convert for multidimensional arrays. For {@link List} or {@link Deque}, returns a live wrapper
+     * around the object, see {@link ListAdapter} for details. Returns null if obj is null.
      * @throws ClassNotFoundException if the class described by objType is not found
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
-    public static Object toJavaArray(final Object self, final Object objArray, final Object objType) throws ClassNotFoundException {
-        final StaticClass componentType =
-            objType instanceof StaticClass ?
-                (StaticClass)objType :
-                objType == UNDEFINED ?
-                    StaticClass.forClass(Object.class) :
-                    type(objType);
-
-        if (objArray == null) {
+    public static Object to(final Object self, final Object obj, final Object objType) throws ClassNotFoundException {
+        if (obj == null) {
             return null;
         }
 
-        Global.checkObject(objArray);
+        Global.checkObject(obj);
+
+        final Class<?> targetClass;
+        if(objType == UNDEFINED) {
+            targetClass = Object[].class;
+        } else {
+            final StaticClass targetType;
+            if(objType instanceof StaticClass) {
+                targetType = (StaticClass)objType;
+            } else {
+                targetType = type(objType);
+            }
+            targetClass = targetType.getRepresentedClass();
+        }
+
+        if(targetClass.isArray()) {
+            return ((ScriptObject)obj).getArray().asArrayOfType(targetClass.getComponentType());
+        }
+
+        if(targetClass == List.class || targetClass == Deque.class) {
+            return new ListAdapter((ScriptObject)obj);
+        }
 
-        return ((ScriptObject)objArray).getArray().asArrayOfType(componentType.getRepresentedClass());
+        throw typeError("unsupported.java.to.type", targetClass.getName());
     }
 
     /**
@@ -283,7 +303,7 @@ public final class NativeJava {
      * <pre>
      * var File = Java.type("java.io.File")
      * var listHomeDir = new File("~").listFiles()
-     * var jsListHome = Java.toJavaScriptArray(listHomeDir)
+     * var jsListHome = Java.from(listHomeDir)
      * var jpegModifiedDates = jsListHome
      *     .filter(function(val) { return val.getName().endsWith(".jpg") })
      *     .map(function(val) { return val.lastModified() })
@@ -294,7 +314,7 @@ public final class NativeJava {
      * null.
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
-    public static Object toJavaScriptArray(final Object self, final Object objArray) {
+    public static Object from(final Object self, final Object objArray) {
         if (objArray == null) {
             return null;
         } else if (objArray instanceof Collection) {
diff --git a/src/jdk/nashorn/internal/objects/NativeMath.java b/src/jdk/nashorn/internal/objects/NativeMath.java
index 7f330efc..50a2d864 100644
--- a/src/jdk/nashorn/internal/objects/NativeMath.java
+++ b/src/jdk/nashorn/internal/objects/NativeMath.java
@@ -611,13 +611,11 @@ public final class NativeMath extends ScriptObject {
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
     public static Object round(final Object self, final Object x) {
-        if (GlobalFunctions.isNaN(self, x)) {
-            return Double.NaN;
-        } else if (!GlobalFunctions.isFinite(self, x)) {
-            return x;
+        final double d = JSType.toNumber(x);
+        if (Math.getExponent(d) >= 52) {
+            return d;
         }
-
-        return Math.round(JSType.toNumber(x));
+        return Math.copySign(Math.floor(d + 0.5), d);
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/objects/NativeString.java b/src/jdk/nashorn/internal/objects/NativeString.java
index 2715d4f4..df4aa1bf 100644
--- a/src/jdk/nashorn/internal/objects/NativeString.java
+++ b/src/jdk/nashorn/internal/objects/NativeString.java
@@ -38,6 +38,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Locale;
 import jdk.internal.dynalink.CallSiteDescriptor;
 import jdk.internal.dynalink.linker.GuardedInvocation;
 import jdk.internal.dynalink.linker.LinkRequest;
@@ -630,17 +631,24 @@ public final class NativeString extends ScriptObject {
 
         final String str       = checkObjectToString(self);
         final String searchStr = JSType.toString(search);
+        final int length       = str.length();
 
-        int from;
+        int end;
 
         if (pos == UNDEFINED) {
-            from = str.length();
+            end = length;
         } else {
             final double numPos = JSType.toNumber(pos);
-            from = !Double.isNaN(numPos) ? (int)numPos : (int)Double.POSITIVE_INFINITY;
+            end = Double.isNaN(numPos) ? length : (int)numPos;
+            if (end < 0) {
+                end = 0;
+            } else if (end > length) {
+                end = length;
+            }
         }
 
-        return str.lastIndexOf(searchStr, from);
+
+        return str.lastIndexOf(searchStr, end);
     }
 
     /**
@@ -997,7 +1005,7 @@ public final class NativeString extends ScriptObject {
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE)
     public static Object toLowerCase(final Object self) {
-        return checkObjectToString(self).toLowerCase();
+        return checkObjectToString(self).toLowerCase(Locale.ROOT);
     }
 
     /**
@@ -1017,7 +1025,7 @@ public final class NativeString extends ScriptObject {
      */
     @Function(attributes = Attribute.NOT_ENUMERABLE)
     public static Object toUpperCase(final Object self) {
-        return checkObjectToString(self).toUpperCase();
+        return checkObjectToString(self).toUpperCase(Locale.ROOT);
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/objects/NativeUint16Array.java b/src/jdk/nashorn/internal/objects/NativeUint16Array.java
index 740bb394..13ce3474 100644
--- a/src/jdk/nashorn/internal/objects/NativeUint16Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeUint16Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 
@@ -37,7 +39,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Uint16Array")
 public final class NativeUint16Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 2;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 2;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeUint32Array.java b/src/jdk/nashorn/internal/objects/NativeUint32Array.java
index 9be01312..fb45c282 100644
--- a/src/jdk/nashorn/internal/objects/NativeUint32Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeUint32Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
@@ -38,7 +40,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Uint32Array")
 public final class NativeUint32Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 4;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 4;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteBegin, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeUint8Array.java b/src/jdk/nashorn/internal/objects/NativeUint8Array.java
index 7d506c1d..6cebcdb9 100644
--- a/src/jdk/nashorn/internal/objects/NativeUint8Array.java
+++ b/src/jdk/nashorn/internal/objects/NativeUint8Array.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
 
@@ -37,7 +39,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Uint8Array")
 public final class NativeUint8Array extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 1;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 1;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/objects/NativeUint8ClampedArray.java b/src/jdk/nashorn/internal/objects/NativeUint8ClampedArray.java
index e3bacc2b..de171caa 100644
--- a/src/jdk/nashorn/internal/objects/NativeUint8ClampedArray.java
+++ b/src/jdk/nashorn/internal/objects/NativeUint8ClampedArray.java
@@ -28,7 +28,9 @@ package jdk.nashorn.internal.objects;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
+import jdk.nashorn.internal.objects.annotations.Property;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
+import jdk.nashorn.internal.objects.annotations.Where;
 import jdk.nashorn.internal.runtime.JSType;
 import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.arrays.ArrayData;
@@ -38,7 +40,12 @@ import jdk.nashorn.internal.runtime.arrays.ArrayData;
  */
 @ScriptClass("Uint8ClampedArray")
 public final class NativeUint8ClampedArray extends ArrayBufferView {
-    private static final int BYTES_PER_ELEMENT = 1;
+    /**
+     * The size in bytes of each element in the array.
+     */
+    @Property(attributes = Attribute.NOT_ENUMERABLE | Attribute.NOT_WRITABLE | Attribute.NOT_CONFIGURABLE, where = Where.CONSTRUCTOR)
+    public static final int BYTES_PER_ELEMENT = 1;
+
     private static final Factory FACTORY = new Factory(BYTES_PER_ELEMENT) {
         @Override
         public ArrayBufferView construct(final NativeArrayBuffer buffer, final int byteOffset, final int length) {
diff --git a/src/jdk/nashorn/internal/parser/Parser.java b/src/jdk/nashorn/internal/parser/Parser.java
index efb7a391..03f65b86 100644
--- a/src/jdk/nashorn/internal/parser/Parser.java
+++ b/src/jdk/nashorn/internal/parser/Parser.java
@@ -1537,7 +1537,7 @@ loop:
 
         endOfLine();
 
-        appendStatement(new ThrowNode(throwLine, throwToken, finish, expression));
+        appendStatement(new ThrowNode(throwLine, throwToken, finish, expression, 0));
     }
 
     /**
@@ -1597,7 +1597,7 @@ loop:
                 try {
                     // Get CATCH body.
                     final Block catchBody = getBlock(true);
-                    final CatchNode catchNode = new CatchNode(catchLine, catchToken, finish, exception, ifExpression, catchBody);
+                    final CatchNode catchNode = new CatchNode(catchLine, catchToken, finish, exception, ifExpression, catchBody, 0);
                     appendStatement(catchNode);
                 } finally {
                     catchBlock = restoreBlock(catchBlock);
diff --git a/src/jdk/nashorn/internal/parser/TokenType.java b/src/jdk/nashorn/internal/parser/TokenType.java
index 657c8c46..92f3ad74 100644
--- a/src/jdk/nashorn/internal/parser/TokenType.java
+++ b/src/jdk/nashorn/internal/parser/TokenType.java
@@ -25,6 +25,7 @@
 
 package jdk.nashorn.internal.parser;
 
+import java.util.Locale;
 import static jdk.nashorn.internal.parser.TokenKind.BINARY;
 import static jdk.nashorn.internal.parser.TokenKind.BRACKET;
 import static jdk.nashorn.internal.parser.TokenKind.FUTURE;
@@ -249,7 +250,7 @@ public enum TokenType {
     }
 
     public String getNameOrType() {
-        return name == null ? super.name().toLowerCase() : name;
+        return name == null ? super.name().toLowerCase(Locale.ENGLISH) : name;
     }
 
     public TokenType getNext() {
diff --git a/src/jdk/nashorn/internal/runtime/AccessorProperty.java b/src/jdk/nashorn/internal/runtime/AccessorProperty.java
index 38effdaf..13e9e1ce 100644
--- a/src/jdk/nashorn/internal/runtime/AccessorProperty.java
+++ b/src/jdk/nashorn/internal/runtime/AccessorProperty.java
@@ -75,7 +75,23 @@ public class AccessorProperty extends Property {
 
     private static final MethodType[] ACCESSOR_GETTER_TYPES = new MethodType[NOOF_TYPES];
     private static final MethodType[] ACCESSOR_SETTER_TYPES = new MethodType[NOOF_TYPES];
-    private static final MethodHandle SPILLGETTER = MH.asType(MH.getter(MethodHandles.lookup(), ScriptObject.class, "spill", Object[].class), Lookup.GET_OBJECT_TYPE);
+    private static final MethodHandle SPILL_ELEMENT_GETTER;
+    private static final MethodHandle SPILL_ELEMENT_SETTER;
+
+    private static final int SPILL_CACHE_SIZE = 8;
+    private static final MethodHandle[] SPILL_ACCESSORS = new MethodHandle[SPILL_CACHE_SIZE * 2];
+
+    static {
+        for (int i = 0; i < NOOF_TYPES; i++) {
+            final Type type = ACCESSOR_TYPES.get(i);
+            ACCESSOR_GETTER_TYPES[i] = MH.type(type.getTypeClass(), Object.class);
+            ACCESSOR_SETTER_TYPES[i] = MH.type(void.class, Object.class, type.getTypeClass());
+        }
+
+        final MethodHandle spillGetter = MH.getter(MethodHandles.lookup(), ScriptObject.class, "spill", Object[].class);
+        SPILL_ELEMENT_GETTER = MH.filterArguments(MH.arrayElementGetter(Object[].class), 0, spillGetter);
+        SPILL_ELEMENT_SETTER = MH.filterArguments(MH.arrayElementSetter(Object[].class), 0, spillGetter);
+    }
 
     /** Seed getter for the primitive version of this field (in -Dnashorn.fields.dual=true mode) */
     private MethodHandle primitiveGetter;
@@ -96,14 +112,6 @@ public class AccessorProperty extends Property {
      */
     private Class<?> currentType;
 
-    static {
-        for (int i = 0; i < NOOF_TYPES; i++) {
-            final Type type = ACCESSOR_TYPES.get(i);
-            ACCESSOR_GETTER_TYPES[i] = MH.type(type.getTypeClass(), Object.class);
-            ACCESSOR_SETTER_TYPES[i] = MH.type(void.class, Object.class, type.getTypeClass());
-        }
-    }
-
     /**
      * Delegate constructor. This is used when adding properties to the Global scope, which
      * is necessary for outermost levels in a script (the ScriptObject is represented by
@@ -114,19 +122,31 @@ public class AccessorProperty extends Property {
      * @param delegate  delegate script object to rebind receiver to
      */
     public AccessorProperty(final AccessorProperty property, final ScriptObject delegate) {
-        this(property);
-
-        this.getters = new MethodHandle[NOOF_TYPES];
+        super(property);
 
-        this.primitiveGetter = bindTo(primitiveGetter, delegate);
-        this.primitiveSetter = bindTo(primitiveSetter, delegate);
-        this.objectGetter    = bindTo(objectGetter, delegate);
-        this.objectSetter    = bindTo(objectSetter, delegate);
+        this.primitiveGetter = bindTo(property.primitiveGetter, delegate);
+        this.primitiveSetter = bindTo(property.primitiveSetter, delegate);
+        this.objectGetter    = bindTo(property.objectGetter, delegate);
+        this.objectSetter    = bindTo(property.objectSetter, delegate);
 
         setCurrentType(property.getCurrentType());
     }
 
     /**
+     * Constructor for spill properties. Array getters and setters will be created on demand.
+     *
+     * @param key    the property key
+     * @param flags  the property flags
+     * @param slot   spill slot
+     */
+    public AccessorProperty(final String key, final int flags, final int slot) {
+        super(key, flags, slot);
+        assert (flags & IS_SPILL) == IS_SPILL;
+
+        setCurrentType(Object.class);
+    }
+
+    /**
      * Constructor. Similar to the constructor with both primitive getters and setters, the difference
      * here being that only one getter and setter (setter is optional for non writable fields) is given
      * to the constructor, and the rest are created from those. Used e.g. by Nasgen classes
@@ -268,7 +288,40 @@ public class AccessorProperty extends Property {
     }
 
     @Override
+    protected void setObjectValue(final ScriptObject self, final ScriptObject owner, final Object value, final boolean strict)  {
+        if (isSpill()) {
+            self.spill[getSlot()] = value;
+        } else {
+            try {
+                getSetter(Object.class, self.getMap()).invokeExact((Object)self, value);
+            } catch (final Error|RuntimeException e) {
+                throw e;
+            } catch (final Throwable e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    @Override
+    protected Object getObjectValue(final ScriptObject self, final ScriptObject owner) {
+        if (isSpill()) {
+            return self.spill[getSlot()];
+        }
+
+        try {
+            return getGetter(Object.class).invokeExact((Object)self);
+        } catch (final Error|RuntimeException e) {
+            throw e;
+        } catch (final Throwable e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
     public MethodHandle getGetter(final Class<?> type) {
+        if (isSpill() && objectGetter == null) {
+            objectGetter = getSpillGetter();
+        }
         final int i = getAccessorTypeIndex(type);
         if (getters[i] == null) {
             getters[i] = debug(
@@ -284,7 +337,7 @@ public class AccessorProperty extends Property {
                 "get");
         }
 
-        return isSpill() ? MH.filterArguments(getters[i], 0, SPILLGETTER) : getters[i];
+        return getters[i];
     }
 
     private Property getWiderProperty(final Class<?> type) {
@@ -313,6 +366,9 @@ public class AccessorProperty extends Property {
     }
 
     private MethodHandle generateSetter(final Class<?> forType, final Class<?> type) {
+        if (isSpill() && objectSetter == null) {
+            objectSetter = getSpillSetter();
+        }
         MethodHandle mh = createSetter(forType, type, primitiveSetter, objectSetter);
         mh = MH.asType(mh, ACCESSOR_SETTER_TYPES[getAccessorTypeIndex(type)]); //has to be the case for invokeexact to work in ScriptObject
         mh = debug(mh, currentType, type, "set");
@@ -343,7 +399,7 @@ public class AccessorProperty extends Property {
             mh = generateSetter(forType, type);
         }
 
-        return isSpill() ? MH.filterArguments(mh, 0, SPILLGETTER) : mh;
+        return mh;
     }
 
     @Override
@@ -363,6 +419,30 @@ public class AccessorProperty extends Property {
         setCurrentType(newType);
     }
 
+    private MethodHandle getSpillGetter() {
+        final int slot = getSlot();
+        MethodHandle getter = slot < SPILL_CACHE_SIZE ? SPILL_ACCESSORS[slot * 2] : null;
+        if (getter == null) {
+            getter = MH.asType(MH.insertArguments(SPILL_ELEMENT_GETTER, 1, slot), Lookup.GET_OBJECT_TYPE);
+            if (slot < SPILL_CACHE_SIZE) {
+                SPILL_ACCESSORS[slot * 2] = getter;
+            }
+        }
+        return getter;
+    }
+
+    private MethodHandle getSpillSetter() {
+        final int slot = getSlot();
+        MethodHandle setter = slot < SPILL_CACHE_SIZE ? SPILL_ACCESSORS[slot * 2 + 1] : null;
+        if (setter == null) {
+            setter = MH.asType(MH.insertArguments(SPILL_ELEMENT_SETTER, 1, slot), Lookup.SET_OBJECT_TYPE);
+            if (slot < SPILL_CACHE_SIZE) {
+                SPILL_ACCESSORS[slot * 2 + 1] = setter;
+            }
+        }
+        return setter;
+    }
+
     private static void finest(final String str) {
         if (DEBUG_FIELDS) {
             LOG.finest(str);
diff --git a/src/jdk/nashorn/internal/runtime/CompiledFunction.java b/src/jdk/nashorn/internal/runtime/CompiledFunction.java
index d36f216c..afa3657c 100644
--- a/src/jdk/nashorn/internal/runtime/CompiledFunction.java
+++ b/src/jdk/nashorn/internal/runtime/CompiledFunction.java
@@ -35,21 +35,27 @@ import jdk.nashorn.internal.codegen.types.Type;
  */
 final class CompiledFunction implements Comparable<CompiledFunction> {
 
+    /** The method type may be more specific than the invoker, if. e.g.
+     *  the invoker is guarded, and a guard with a generic object only
+     *  fallback, while the target is more specific, we still need the
+     *  more specific type for sorting */
+    private final MethodType   type;
     private final MethodHandle invoker;
     private MethodHandle constructor;
 
-    CompiledFunction(final MethodHandle invoker) {
-        this(invoker, null);
+    CompiledFunction(final MethodType type, final MethodHandle invoker) {
+        this(type, invoker, null);
     }
 
-    CompiledFunction(final MethodHandle invoker, final MethodHandle constructor) {
-        this.invoker = invoker;
-        this.constructor = constructor; //isConstructor
+    CompiledFunction(final MethodType type, final MethodHandle invoker, final MethodHandle constructor) {
+        this.type        = type;
+        this.invoker     = invoker;
+        this.constructor = constructor;
     }
 
     @Override
     public String toString() {
-        return "<invoker=" + invoker + " ctor=" + constructor + ">";
+        return "<callSiteType= " + type + " invoker=" + invoker + " ctor=" + constructor + ">";
     }
 
     MethodHandle getInvoker() {
@@ -69,7 +75,7 @@ final class CompiledFunction implements Comparable<CompiledFunction> {
     }
 
     MethodType type() {
-        return invoker.type();
+        return type;
     }
 
     @Override
@@ -103,8 +109,8 @@ final class CompiledFunction implements Comparable<CompiledFunction> {
         return weight() > o.weight();
     }
 
-    boolean moreGenericThan(final MethodType type) {
-        return weight() > weight(type);
+    boolean moreGenericThan(final MethodType mt) {
+        return weight() > weight(mt);
     }
 
     /**
@@ -112,15 +118,15 @@ final class CompiledFunction implements Comparable<CompiledFunction> {
      * It is compatible if the types are narrower than the invocation type so that
      * a semantically equivalent linkage can be performed.
      *
-     * @param typesc
+     * @param mt type to check against
      * @return
      */
-    boolean typeCompatible(final MethodType type) {
-        final Class<?>[] wantedParams   = type.parameterArray();
+    boolean typeCompatible(final MethodType mt) {
+        final Class<?>[] wantedParams   = mt.parameterArray();
         final Class<?>[] existingParams = type().parameterArray();
 
         //if we are not examining a varargs type, the number of parameters must be the same
-        if (wantedParams.length != existingParams.length && !isVarArgsType(type)) {
+        if (wantedParams.length != existingParams.length && !isVarArgsType(mt)) {
             return false;
         }
 
diff --git a/src/jdk/nashorn/internal/runtime/DebugLogger.java b/src/jdk/nashorn/internal/runtime/DebugLogger.java
index dda24bbf..fa0dbede 100644
--- a/src/jdk/nashorn/internal/runtime/DebugLogger.java
+++ b/src/jdk/nashorn/internal/runtime/DebugLogger.java
@@ -35,7 +35,6 @@ import jdk.nashorn.internal.runtime.options.Options;
  */
 
 public final class DebugLogger {
-    @SuppressWarnings("NonConstantLogger")
     private final Logger  logger;
     private final boolean isEnabled;
 
diff --git a/src/jdk/nashorn/internal/runtime/FinalScriptFunctionData.java b/src/jdk/nashorn/internal/runtime/FinalScriptFunctionData.java
index ed54b2e9..469245f1 100644
--- a/src/jdk/nashorn/internal/runtime/FinalScriptFunctionData.java
+++ b/src/jdk/nashorn/internal/runtime/FinalScriptFunctionData.java
@@ -78,9 +78,9 @@ public final class FinalScriptFunctionData extends ScriptFunctionData {
             //only nasgen constructors: (boolean, self, args) are subject to binding a boolean newObj. isConstructor
             //is too conservative a check. However, isConstructor(mh) always implies isConstructor param
             assert isConstructor();
-            code.add(new CompiledFunction(MH.insertArguments(mh, 0, false), composeConstructor(MH.insertArguments(mh, 0, true), needsCallee))); //make sure callee state can be determined when we reach constructor
+            code.add(new CompiledFunction(mh.type(), MH.insertArguments(mh, 0, false), composeConstructor(MH.insertArguments(mh, 0, true), needsCallee))); //make sure callee state can be determined when we reach constructor
         } else {
-            code.add(new CompiledFunction(mh));
+            code.add(new CompiledFunction(mh.type(), mh));
         }
     }
 
diff --git a/src/jdk/nashorn/internal/runtime/FindProperty.java b/src/jdk/nashorn/internal/runtime/FindProperty.java
index 903d1d5d..16165fe9 100644
--- a/src/jdk/nashorn/internal/runtime/FindProperty.java
+++ b/src/jdk/nashorn/internal/runtime/FindProperty.java
@@ -153,5 +153,24 @@ public final class FindProperty {
         return prototype.isScope();
     }
 
+    /**
+     * Get the property value from self as object.
+     *
+     * @return the property value
+     */
+    public Object getObjectValue() {
+        return property.getObjectValue(getGetterReceiver(), getOwner());
+    }
+
+    /**
+     * Set the property value in self.
+     *
+     * @param value the new value
+     * @param strict strict flag
+     */
+    public void setObjectValue(final Object value, final boolean strict) {
+        property.setObjectValue(getSetterReceiver(), getOwner(), value, strict);
+    }
+
 }
 
diff --git a/src/jdk/nashorn/internal/runtime/GlobalFunctions.java b/src/jdk/nashorn/internal/runtime/GlobalFunctions.java
index 91011533..98b79150 100644
--- a/src/jdk/nashorn/internal/runtime/GlobalFunctions.java
+++ b/src/jdk/nashorn/internal/runtime/GlobalFunctions.java
@@ -30,6 +30,7 @@ import static jdk.nashorn.internal.lookup.Lookup.MH;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
+import java.util.Locale;
 
 /**
  * Utilities used by Global class.
@@ -373,10 +374,10 @@ loop:
             } else if (ch < 256) {
                 sb.append('%');
                 final byte b = (byte)ch;
-                sb.append(Integer.toHexString(b & 0xFF).toUpperCase());
+                sb.append(Integer.toHexString(b & 0xFF).toUpperCase(Locale.ENGLISH));
             } else {
                 sb.append("%u");
-                sb.append(Integer.toHexString(ch & 0xFFFF).toUpperCase());
+                sb.append(Integer.toHexString(ch & 0xFFFF).toUpperCase(Locale.ENGLISH));
             }
         }
 
diff --git a/src/jdk/nashorn/internal/runtime/JSONFunctions.java b/src/jdk/nashorn/internal/runtime/JSONFunctions.java
index 6106a314..ed4d8653 100644
--- a/src/jdk/nashorn/internal/runtime/JSONFunctions.java
+++ b/src/jdk/nashorn/internal/runtime/JSONFunctions.java
@@ -36,6 +36,8 @@ import jdk.nashorn.internal.ir.UnaryNode;
 import jdk.nashorn.internal.parser.JSONParser;
 import jdk.nashorn.internal.parser.TokenType;
 import jdk.nashorn.internal.runtime.linker.Bootstrap;
+import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.getArrayIndexNoThrow;
+import static jdk.nashorn.internal.runtime.arrays.ArrayIndex.isValidArrayIndex;
 
 /**
  * Utilities used by "JSON" object implementation.
@@ -94,7 +96,7 @@ public final class JSONFunctions {
         if (reviver instanceof ScriptFunction) {
             assert global instanceof GlobalObject;
             final ScriptObject root = ((GlobalObject)global).newObject();
-            root.set("", unfiltered, root.isStrictContext());
+            root.addOwnProperty("", Property.WRITABLE_ENUMERABLE_CONFIGURABLE, unfiltered);
             return walk(root, "", (ScriptFunction)reviver);
         }
         return unfiltered;
@@ -115,7 +117,7 @@ public final class JSONFunctions {
                 if (newElement == ScriptRuntime.UNDEFINED) {
                     valueObj.delete(key, strict);
                 } else {
-                    valueObj.set(key, newElement, strict);
+                    setPropertyValue(valueObj, key, newElement, strict);
                 }
             }
         }
@@ -175,7 +177,9 @@ public final class JSONFunctions {
                 final PropertyNode pNode     = (PropertyNode) elem;
                 final Node         valueNode = pNode.getValue();
 
-                object.set(pNode.getKeyName(), convertNode(global, valueNode), strict);
+                final String name = pNode.getKeyName();
+                final Object value = convertNode(global, valueNode);
+                setPropertyValue(object, name, value, strict);
             }
 
             return object;
@@ -188,6 +192,21 @@ public final class JSONFunctions {
         }
     }
 
+    // add a new property if does not exist already, or else set old property
+    private static void setPropertyValue(final ScriptObject sobj, final String name, final Object value, final boolean strict) {
+        final int index = getArrayIndexNoThrow(name);
+        if (isValidArrayIndex(index)) {
+            // array index key
+            sobj.defineOwnProperty(index, value);
+        } else if (sobj.getMap().findProperty(name) != null) {
+            // pre-existing non-inherited property, call set
+            sobj.set(name, value, strict);
+        } else {
+            // add new property
+            sobj.addOwnProperty(name, Property.WRITABLE_ENUMERABLE_CONFIGURABLE, value);
+        }
+    }
+
     // does the given IR node represent a numeric array?
     private static boolean isNumericArray(final Node[] values) {
         for (final Node node : values) {
diff --git a/src/jdk/nashorn/internal/runtime/JSType.java b/src/jdk/nashorn/internal/runtime/JSType.java
index e972a99e..8f1f1e9e 100644
--- a/src/jdk/nashorn/internal/runtime/JSType.java
+++ b/src/jdk/nashorn/internal/runtime/JSType.java
@@ -28,6 +28,7 @@ package jdk.nashorn.internal.runtime;
 import static jdk.nashorn.internal.codegen.CompilerConstants.staticCall;
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 
+import java.util.Locale;
 import jdk.internal.dynalink.beans.StaticClass;
 import jdk.nashorn.internal.codegen.CompilerConstants.Call;
 import jdk.nashorn.internal.parser.Lexer;
@@ -111,7 +112,7 @@ public enum JSType {
      */
     public final String typeName() {
         // For NULL, "object" has to be returned!
-        return ((this == NULL) ? OBJECT : this).name().toLowerCase();
+        return ((this == NULL) ? OBJECT : this).name().toLowerCase(Locale.ENGLISH);
     }
 
     /**
@@ -565,8 +566,11 @@ public enum JSType {
     }
 
     /**
-     * JavaScript compliant Object to integer conversion
-     * See ECMA 9.4 ToInteger
+     * JavaScript compliant Object to integer conversion. See ECMA 9.4 ToInteger
+     *
+     * <p>Note that this returns {@link java.lang.Integer#MAX_VALUE} or {@link java.lang.Integer#MIN_VALUE}
+     * for double values that exceed the int range, including positive and negative Infinity. It is the
+     * caller's responsibility to handle such values correctly.</p>
      *
      * @param obj  an object
      * @return an integer
@@ -576,8 +580,11 @@ public enum JSType {
     }
 
     /**
-     * JavaScript compliant Object to long conversion
-     * See ECMA 9.4 ToInteger
+     * JavaScript compliant Object to long conversion. See ECMA 9.4 ToInteger
+     *
+     * <p>Note that this returns {@link java.lang.Long#MAX_VALUE} or {@link java.lang.Long#MIN_VALUE}
+     * for double values that exceed the long range, including positive and negative Infinity. It is the
+     * caller's responsibility to handle such values correctly.</p>
      *
      * @param obj  an object
      * @return a long
diff --git a/src/jdk/nashorn/internal/runtime/ListAdapter.java b/src/jdk/nashorn/internal/runtime/ListAdapter.java
new file mode 100644
index 00000000..cc99cd12
--- /dev/null
+++ b/src/jdk/nashorn/internal/runtime/ListAdapter.java
@@ -0,0 +1,337 @@
+package jdk.nashorn.internal.runtime;
+
+import java.util.AbstractList;
+import java.util.Deque;
+import java.util.Iterator;
+import java.util.ListIterator;
+import java.util.NoSuchElementException;
+import java.util.RandomAccess;
+import jdk.nashorn.internal.runtime.linker.InvokeByName;
+
+/**
+ * An adapter that can wrap any ECMAScript Array-like object (that adheres to the array rules for the property
+ * {@code length} and having conforming {@code push}, {@code pop}, {@code shift}, {@code unshift}, and {@code splice}
+ * methods) and expose it as both a Java list and double-ended queue. While script arrays aren't necessarily efficient
+ * as dequeues, it's still slightly more efficient to be able to translate dequeue operations into pushes, pops, shifts,
+ * and unshifts, than to blindly translate all list's add/remove operations into splices. Also, it is conceivable that a
+ * custom script object that implements an Array-like API can have a background data representation that is optimized
+ * for dequeue-like access. Note that with ECMAScript arrays, {@code push} and {@pop} operate at the end of the array,
+ * while in Java {@code Deque} they operate on the front of the queue and as such the Java dequeue {@link #push(Object)}
+ * and {@link #pop()} operations will translate to {@code unshift} and {@code shift} script operations respectively,
+ * while {@link #addLast(Object)} and {@link #removeLast()} will translate to {@code push} and {@code pop}.
+ */
+public class ListAdapter extends AbstractList<Object> implements RandomAccess, Deque<Object> {
+    // These add to the back and front of the list
+    private static final InvokeByName PUSH    = new InvokeByName("push",    ScriptObject.class, void.class, Object.class);
+    private static final InvokeByName UNSHIFT = new InvokeByName("unshift", ScriptObject.class, void.class, Object.class);
+
+    // These remove from the back and front of the list
+    private static final InvokeByName POP   = new InvokeByName("pop",   ScriptObject.class, Object.class);
+    private static final InvokeByName SHIFT = new InvokeByName("shift", ScriptObject.class, Object.class);
+
+    // These insert and remove in the middle of the list
+    private static final InvokeByName SPLICE_ADD    = new InvokeByName("splice", ScriptObject.class, void.class, int.class, int.class, Object.class);
+    private static final InvokeByName SPLICE_REMOVE = new InvokeByName("splice", ScriptObject.class, void.class, int.class, int.class);
+
+    private final ScriptObject obj;
+
+    /**
+     * Creates a new list wrapper for the specified script object.
+     * @param obj script the object to wrap
+     */
+    public ListAdapter(ScriptObject obj) {
+        this.obj = obj;
+    }
+
+    @Override
+    public int size() {
+        return JSType.toInt32(obj.getLength());
+    }
+
+    @Override
+    public Object get(int index) {
+        checkRange(index);
+        return obj.get(index);
+    }
+
+    @Override
+    public Object set(int index, Object element) {
+        checkRange(index);
+        final Object prevValue = get(index);
+        obj.set(index, element, false);
+        return prevValue;
+    }
+
+    private void checkRange(int index) {
+        if(index < 0 || index >= size()) {
+            throw invalidIndex(index);
+        }
+    }
+
+    @Override
+    public void push(Object e) {
+        addFirst(e);
+    }
+
+    @Override
+    public boolean add(Object e) {
+        addLast(e);
+        return true;
+    }
+
+    @Override
+    public void addFirst(Object e) {
+        try {
+            final Object fn = UNSHIFT.getGetter().invokeExact(obj);
+            checkFunction(fn, UNSHIFT);
+            UNSHIFT.getInvoker().invokeExact(fn, obj, e);
+        } catch(RuntimeException | Error ex) {
+            throw ex;
+        } catch(Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    @Override
+    public void addLast(Object e) {
+        try {
+            final Object fn = PUSH.getGetter().invokeExact(obj);
+            checkFunction(fn, PUSH);
+            PUSH.getInvoker().invokeExact(fn, obj, e);
+        } catch(RuntimeException | Error ex) {
+            throw ex;
+        } catch(Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    @Override
+    public void add(int index, Object e) {
+        try {
+            if(index < 0) {
+                throw invalidIndex(index);
+            } else if(index == 0) {
+                addFirst(e);
+            } else {
+                final int size = size();
+                if(index < size) {
+                    final Object fn = SPLICE_ADD.getGetter().invokeExact(obj);
+                    checkFunction(fn, SPLICE_ADD);
+                    SPLICE_ADD.getInvoker().invokeExact(fn, obj, index, 0, e);
+                } else if(index == size) {
+                    addLast(e);
+                } else {
+                    throw invalidIndex(index);
+                }
+            }
+        } catch(RuntimeException | Error ex) {
+            throw ex;
+        } catch(Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+    private static void checkFunction(Object fn, InvokeByName invoke) {
+        if(!(fn instanceof ScriptFunction)) {
+            throw new UnsupportedOperationException("The script object doesn't have a function named " + invoke.getName());
+        }
+    }
+
+    private static IndexOutOfBoundsException invalidIndex(int index) {
+        return new IndexOutOfBoundsException(String.valueOf(index));
+    }
+
+    @Override
+    public boolean offer(Object e) {
+        return offerLast(e);
+    }
+
+    @Override
+    public boolean offerFirst(Object e) {
+        addFirst(e);
+        return true;
+    }
+
+    @Override
+    public boolean offerLast(Object e) {
+        addLast(e);
+        return true;
+    }
+
+    @Override
+    public Object pop() {
+        return removeFirst();
+    }
+
+    @Override
+    public Object remove() {
+        return removeFirst();
+    }
+
+    @Override
+    public Object removeFirst() {
+        checkNonEmpty();
+        return invokeShift();
+    }
+
+    @Override
+    public Object removeLast() {
+        checkNonEmpty();
+        return invokePop();
+    }
+
+    private void checkNonEmpty() {
+        if(isEmpty()) {
+            throw new NoSuchElementException();
+        }
+    }
+
+    @Override
+    public Object remove(int index) {
+        if(index < 0) {
+            throw invalidIndex(index);
+        } else if (index == 0) {
+            return invokeShift();
+        } else {
+            final int maxIndex = size() - 1;
+            if(index < maxIndex) {
+                final Object prevValue = get(index);
+                invokeSpliceRemove(index, 1);
+                return prevValue;
+            } else if(index == maxIndex) {
+                return invokePop();
+            } else {
+                throw invalidIndex(index);
+            }
+        }
+    }
+
+    private Object invokeShift() {
+        try {
+            final Object fn = SHIFT.getGetter().invokeExact(obj);
+            checkFunction(fn, SHIFT);
+            return SHIFT.getInvoker().invokeExact(fn, obj);
+        } catch(RuntimeException | Error ex) {
+            throw ex;
+        } catch(Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    private Object invokePop() {
+        try {
+            final Object fn = POP.getGetter().invokeExact(obj);
+            checkFunction(fn, POP);
+            return POP.getInvoker().invokeExact(fn, obj);
+        } catch(RuntimeException | Error ex) {
+            throw ex;
+        } catch(Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    @Override
+    protected void removeRange(int fromIndex, int toIndex) {
+        invokeSpliceRemove(fromIndex, toIndex - fromIndex);
+    }
+
+    private void invokeSpliceRemove(int fromIndex, int count) {
+        try {
+            final Object fn = SPLICE_REMOVE.getGetter().invokeExact(obj);
+            checkFunction(fn, SPLICE_REMOVE);
+            SPLICE_REMOVE.getInvoker().invokeExact(fn, obj, fromIndex, count);
+        } catch(RuntimeException | Error ex) {
+            throw ex;
+        } catch(Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    @Override
+    public Object poll() {
+        return pollFirst();
+    }
+
+    @Override
+    public Object pollFirst() {
+        return isEmpty() ? null : invokeShift();
+    }
+
+    @Override
+    public Object pollLast() {
+        return isEmpty() ? null : invokePop();
+    }
+
+    @Override
+    public Object peek() {
+        return peekFirst();
+    }
+
+    @Override
+    public Object peekFirst() {
+        return isEmpty() ? null : get(0);
+    }
+
+    @Override
+    public Object peekLast() {
+        return isEmpty() ? null : get(size() - 1);
+    }
+
+    @Override
+    public Object element() {
+        return getFirst();
+    }
+
+    @Override
+    public Object getFirst() {
+        checkNonEmpty();
+        return get(0);
+    }
+
+    @Override
+    public Object getLast() {
+        checkNonEmpty();
+        return get(size() - 1);
+    }
+
+    @Override
+    public Iterator<Object> descendingIterator() {
+        final ListIterator<Object> it = listIterator(size());
+        return new Iterator<Object>() {
+            @Override
+            public boolean hasNext() {
+                return it.hasPrevious();
+            }
+
+            @Override
+            public Object next() {
+                return it.previous();
+            }
+
+            @Override
+            public void remove() {
+                it.remove();
+            }
+        };
+    }
+
+    @Override
+    public boolean removeFirstOccurrence(Object o) {
+        return removeOccurrence(o, iterator());
+    }
+
+    @Override
+    public boolean removeLastOccurrence(Object o) {
+        return removeOccurrence(o, descendingIterator());
+    }
+
+    private static boolean removeOccurrence(Object o, Iterator<Object> it) {
+        while(it.hasNext()) {
+            final Object e = it.next();
+            if(o == null ? e == null : o.equals(e)) {
+                it.remove();
+                return true;
+            }
+        }
+        return false;
+    }
+}
diff --git a/src/jdk/nashorn/internal/runtime/Logging.java b/src/jdk/nashorn/internal/runtime/Logging.java
index 8a69ebf9..39740dd2 100644
--- a/src/jdk/nashorn/internal/runtime/Logging.java
+++ b/src/jdk/nashorn/internal/runtime/Logging.java
@@ -26,6 +26,7 @@
 package jdk.nashorn.internal.runtime;
 
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.logging.ConsoleHandler;
@@ -117,7 +118,7 @@ public final class Logging {
                 if ("".equals(value)) {
                     level = Level.INFO;
                 } else {
-                    level = Level.parse(value.toUpperCase());
+                    level = Level.parse(value.toUpperCase(Locale.ENGLISH));
                 }
 
                 final String name = Logging.lastPart(key);
diff --git a/src/jdk/nashorn/internal/runtime/NativeJavaPackage.java b/src/jdk/nashorn/internal/runtime/NativeJavaPackage.java
index b10b72df..883ff85c 100644
--- a/src/jdk/nashorn/internal/runtime/NativeJavaPackage.java
+++ b/src/jdk/nashorn/internal/runtime/NativeJavaPackage.java
@@ -25,10 +25,16 @@
 
 package jdk.nashorn.internal.runtime;
 
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
 import jdk.internal.dynalink.CallSiteDescriptor;
 import jdk.internal.dynalink.beans.StaticClass;
 import jdk.internal.dynalink.linker.GuardedInvocation;
 import jdk.internal.dynalink.linker.LinkRequest;
+import jdk.internal.dynalink.support.Guards;
+import jdk.nashorn.internal.lookup.MethodHandleFactory;
+import jdk.nashorn.internal.lookup.MethodHandleFunctionality;
 import jdk.nashorn.internal.objects.NativeJava;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Function;
@@ -65,6 +71,10 @@ import jdk.nashorn.internal.objects.annotations.Function;
  * </pre>
  */
 public final class NativeJavaPackage extends ScriptObject {
+    private static final MethodHandleFunctionality MH = MethodHandleFactory.getFunctionality();
+    private static final MethodHandle CLASS_NOT_FOUND = findOwnMH("classNotFound", Void.TYPE, NativeJavaPackage.class);
+    private static final MethodHandle TYPE_GUARD = Guards.getClassGuard(NativeJavaPackage.class);
+
     /** Full name of package (includes path.) */
     private final String name;
 
@@ -123,6 +133,30 @@ public final class NativeJavaPackage extends ScriptObject {
         return super.getDefaultValue(hint);
     }
 
+    @Override
+    protected GuardedInvocation findNewMethod(CallSiteDescriptor desc) {
+        return createClassNotFoundInvocation(desc);
+    }
+
+    @Override
+    protected GuardedInvocation findCallMethod(CallSiteDescriptor desc, LinkRequest request) {
+        return createClassNotFoundInvocation(desc);
+    }
+
+    private static GuardedInvocation createClassNotFoundInvocation(final CallSiteDescriptor desc) {
+        // If NativeJavaPackage is invoked either as a constructor or as a function, throw a ClassNotFoundException as
+        // we can assume the user attempted to instantiate a non-existent class.
+        final MethodType type = desc.getMethodType();
+        return new GuardedInvocation(
+                MH.dropArguments(CLASS_NOT_FOUND, 1, type.parameterList().subList(1, type.parameterCount())),
+                type.parameterType(0) == NativeJavaPackage.class ? null : TYPE_GUARD);
+    }
+
+    @SuppressWarnings("unused")
+    private static void classNotFound(final NativeJavaPackage pkg) throws ClassNotFoundException {
+        throw new ClassNotFoundException(pkg.name);
+    }
+
     /**
      * "No such property" call placeholder.
      *
@@ -188,4 +222,7 @@ public final class NativeJavaPackage extends ScriptObject {
         return noSuchProperty(desc, request);
     }
 
+    private static MethodHandle findOwnMH(final String name, final Class<?> rtype, final Class<?>... types) {
+        return MH.findStatic(MethodHandles.lookup(), NativeJavaPackage.class, name, MH.type(rtype, types));
+    }
 }
diff --git a/src/jdk/nashorn/internal/runtime/Property.java b/src/jdk/nashorn/internal/runtime/Property.java
index 585fc4b3..a5e46016 100644
--- a/src/jdk/nashorn/internal/runtime/Property.java
+++ b/src/jdk/nashorn/internal/runtime/Property.java
@@ -52,6 +52,9 @@ public abstract class Property {
      * we can use leave flag byte initialized with (the default) zero value.
      */
 
+    /** Mask for property being both writable, enumerable and configurable */
+    public static final int WRITABLE_ENUMERABLE_CONFIGURABLE = 0b0000_0000_0000;
+
     /** ECMA 8.6.1 - Is this property not writable? */
     public static final int NOT_WRITABLE     = 0b0000_0000_0001;
 
@@ -352,6 +355,27 @@ public abstract class Property {
     }
 
     /**
+     * Set the value of this property in {@code owner}. This allows to bypass creation of the
+     * setter MethodHandle for spill and user accessor properties.
+     *
+     * @param self the this object
+     * @param owner the owner object
+     * @param value the new property value
+     * @param strict is this a strict setter?
+     */
+    protected abstract void setObjectValue(ScriptObject self, ScriptObject owner, Object value, boolean strict);
+
+    /**
+     * Set the Object value of this property from {@code owner}. This allows to bypass creation of the
+     * getter MethodHandle for spill and user accessor properties.
+     *
+     * @param self the this object
+     * @param owner the owner object
+     * @return  the property value
+     */
+    protected abstract Object getObjectValue(ScriptObject self, ScriptObject owner);
+
+    /**
      * Abstract method for retrieving the setter for the property. We do not know
      * anything about the internal representation when we request the setter, we only
      * know that the setter will take the property as a parameter of the given type.
diff --git a/src/jdk/nashorn/internal/runtime/RecompilableScriptFunctionData.java b/src/jdk/nashorn/internal/runtime/RecompilableScriptFunctionData.java
index 03a25dab..226d83d1 100644
--- a/src/jdk/nashorn/internal/runtime/RecompilableScriptFunctionData.java
+++ b/src/jdk/nashorn/internal/runtime/RecompilableScriptFunctionData.java
@@ -30,6 +30,8 @@ import static jdk.nashorn.internal.lookup.Lookup.MH;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.LinkedList;
 
 import jdk.nashorn.internal.codegen.Compiler;
@@ -49,9 +51,16 @@ import jdk.nashorn.internal.parser.TokenType;
  */
 public final class RecompilableScriptFunctionData extends ScriptFunctionData {
 
+    /** FunctionNode with the code for this ScriptFunction */
     private FunctionNode functionNode;
-    private final PropertyMap  allocatorMap;
+
+    /** Allocator map from makeMap() */
+    private final PropertyMap allocatorMap;
+
+    /** Code installer used for all further recompilation/specialization of this ScriptFunction */
     private final CodeInstaller<ScriptEnvironment> installer;
+
+    /** Name of class where allocator function resides */
     private final String allocatorClassName;
 
     /** lazily generated allocator */
@@ -60,6 +69,23 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
     private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
 
     /**
+     * Used for specialization based on runtime arguments. Whenever we specialize on
+     * callsite parameter types at runtime, we need to use a parameter type guard to
+     * ensure that the specialized version of the script function continues to be
+     * applicable for a particular callsite *
+     */
+    private static final MethodHandle PARAM_TYPE_GUARD = findOwnMH("paramTypeGuard", boolean.class, Type[].class,  Object[].class);
+
+    /**
+     * It is usually a good gamble whever we detect a runtime callsite with a double
+     * (or java.lang.Number instance) to specialize the parameter to an integer, if the
+     * parameter in question can be represented as one. The double typically only exists
+     * because the compiler doesn't know any better than "a number type" and conservatively
+     * picks doubles when it can't prove that an integer addition wouldn't overflow
+     */
+    private static final MethodHandle ENSURE_INT = findOwnMH("ensureInt", int.class, Object.class);
+
+    /**
      * Constructor - public as scripts use it
      *
      * @param functionNode       functionNode that represents this function code
@@ -141,14 +167,6 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
              return; // nothing to do, we have code, at least some.
          }
 
-         // check if function node is lazy, need to compile it.
-         // note that currently function cloning is not working completely, which
-         // means that the compiler will mutate the function node it has been given
-         // once it has been compiled, it cannot be recompiled. This means that
-         // lazy compilation works (not compiled yet) but e.g. specializations won't
-         // until the copy-on-write changes for IR are in, making cloning meaningless.
-         // therefore, currently method specialization is disabled. TODO
-
          if (functionNode.isLazy()) {
              Compiler.LOG.info("Trampoline hit: need to do lazy compilation of '", functionNode.getName(), "'");
              final Compiler compiler = new Compiler(installer);
@@ -156,38 +174,55 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
              assert !functionNode.isLazy();
              compiler.install(functionNode);
 
-             // we don't need to update any flags - varArgs and needsCallee are instrincic
-             // in the function world we need to get a destination node from the compile instead
-             // and replace it with our function node. TODO
+             /*
+              * We don't need to update any flags - varArgs and needsCallee are instrincic
+              * in the function world we need to get a destination node from the compile instead
+              * and replace it with our function node. TODO
+              */
          }
 
-         // we can't get here unless we have bytecode, either from eager compilation or from
-         // running a lazy compile on the lines above
+         /*
+          * We can't get to this program point unless we have bytecode, either from
+          * eager compilation or from running a lazy compile on the lines above
+          */
 
          assert functionNode.hasState(CompilationState.EMITTED) : functionNode.getName() + " " + functionNode.getState() + " " + Debug.id(functionNode);
 
          // code exists - look it up and add it into the automatically sorted invoker list
-         addCode(functionNode, null, null);
+         addCode(functionNode);
+    }
+
+    private MethodHandle addCode(final FunctionNode fn) {
+        return addCode(fn, null, null, null);
     }
 
-    private MethodHandle addCode(final FunctionNode fn, final MethodHandle guard, final MethodHandle fallback) {
-        final MethodHandle target =
+    private MethodHandle addCode(final FunctionNode fn, final MethodType runtimeType, final MethodHandle guard, final MethodHandle fallback) {
+        final MethodType targetType = new FunctionSignature(fn).getMethodType();
+        MethodHandle target =
             MH.findStatic(
                     LOOKUP,
                     fn.getCompileUnit().getCode(),
                     fn.getName(),
-                    new FunctionSignature(fn).
-                        getMethodType());
+                    targetType);
+
+        /*
+         * For any integer argument. a double that is representable as an integer is OK.
+         * otherwise the guard would have failed. in that case introduce a filter that
+         * casts the double to an integer, which we know will preserve all precision.
+         */
+        for (int i = 0; i < targetType.parameterCount(); i++) {
+            if (targetType.parameterType(i) == int.class) {
+                //representable as int
+                target = MH.filterArguments(target, i, ENSURE_INT);
+            }
+        }
+
         MethodHandle mh = target;
         if (guard != null) {
-            try {
-                mh = MH.guardWithTest(MH.asCollector(guard, Object[].class, target.type().parameterCount()), MH.asType(target, fallback.type()), fallback);
-            } catch (Throwable e) {
-                e.printStackTrace();
-            }
+            mh = MH.guardWithTest(MH.asCollector(guard, Object[].class, target.type().parameterCount()), MH.asType(target, fallback.type()), fallback);
         }
 
-        final CompiledFunction cf = new CompiledFunction(mh);
+        final CompiledFunction cf = new CompiledFunction(runtimeType == null ? targetType : runtimeType, mh);
         code.add(cf);
 
         return cf.getInvoker();
@@ -212,69 +247,162 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
         return Type.OBJECT;
     }
 
-    @SuppressWarnings("unused")
-    private static boolean paramTypeGuard(final Type[] compileTimeTypes, final Type[] runtimeTypes, Object... args) {
-        //System.err.println("Param type guard " + Arrays.asList(args));
+    private static boolean canCoerce(final Object arg, final Type type) {
+        Type argType = runtimeType(arg);
+        if (Type.widest(argType, type) == type || arg == ScriptRuntime.UNDEFINED) {
+            return true;
+        }
+        System.err.println(arg + " does not fit in "+ argType + " " + type + " " + arg.getClass());
+        new Throwable().printStackTrace();
         return false;
     }
 
-    private static final MethodHandle PARAM_TYPE_GUARD = findOwnMH("paramTypeGuard", boolean.class, Type[].class, Type[].class, Object[].class);
+    @SuppressWarnings("unused")
+    private static boolean paramTypeGuard(final Type[] paramTypes, final Object... args) {
+        final int length = args.length;
+        assert args.length >= paramTypes.length;
+
+        //i==start, skip the this, callee params etc
+        int start = args.length - paramTypes.length;
+        for (int i = start; i < args.length; i++) {
+            final Object arg = args[i];
+            if (!canCoerce(arg, paramTypes[i - start])) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @SuppressWarnings("unused")
+    private static int ensureInt(final Object arg) {
+        if (arg instanceof Number) {
+            return ((Number)arg).intValue();
+        } else if (arg instanceof Undefined) {
+            return 0;
+        }
+        throw new AssertionError(arg);
+    }
+
+    /**
+     * Given the runtime callsite args, compute a method type that is equivalent to what
+     * was passed - this is typically a lot more specific that what the compiler has been
+     * able to deduce
+     * @param callSiteType callsite type for the compiled callsite target
+     * @param args runtime arguments to the compiled callsite target
+     * @return adjusted method type, narrowed as to conform to runtime callsite type instead
+     */
+    private static MethodType runtimeType(final MethodType callSiteType, final Object[] args) {
+        if (args == null) {
+            //for example bound, or otherwise runtime arguments to callsite unavailable, then
+            //do not change the type
+            return callSiteType;
+        }
+        final Class<?>[] paramTypes = new Class<?>[callSiteType.parameterCount()];
+        final int        start      = args.length - callSiteType.parameterCount();
+        for (int i = start; i < args.length; i++) {
+            paramTypes[i - start] = runtimeType(args[i]).getTypeClass();
+        }
+        return MH.type(callSiteType.returnType(), paramTypes);
+    }
+
+    private static ArrayList<Type> runtimeType(final MethodType mt) {
+        final ArrayList<Type> type = new ArrayList<>();
+        for (int i = 0; i < mt.parameterCount(); i++) {
+            type.add(Type.typeFor(mt.parameterType(i)));
+        }
+        return type;
+    }
 
     @Override
     MethodHandle getBestInvoker(final MethodType callSiteType, final Object[] args) {
-        final MethodHandle mh = super.getBestInvoker(callSiteType, args);
+        final MethodType runtimeType = runtimeType(callSiteType, args);
+        assert runtimeType.parameterCount() == callSiteType.parameterCount();
+
+        final MethodHandle mh = super.getBestInvoker(runtimeType, args);
 
-        if (!functionNode.canSpecialize() || !code.isLessSpecificThan(callSiteType)) {
+        /*
+         * Not all functions can be specialized, for example, if we deemed memory
+         * footprint too large to store a parse snapshot, or if it is meaningless
+         * to do so, such as e.g. for runScript
+         */
+        if (!functionNode.canSpecialize()) {
             return mh;
         }
 
-        final FunctionNode snapshot = functionNode.getSnapshot();
-        if (snapshot == null) {
+        /*
+         * Check if best invoker is equally specific or more specific than runtime
+         * type. In that case, we don't need further specialization, but can use
+         * whatever we have already. We know that it will match callSiteType, or it
+         * would not have been returned from getBestInvoker
+         */
+        if (!code.isLessSpecificThan(runtimeType)) {
             return mh;
         }
 
         int i;
+        final FunctionNode snapshot = functionNode.getSnapshot();
+        assert snapshot != null;
 
-        //classes known at runtime
-        final LinkedList<Type> runtimeArgs = new LinkedList<>();
-        for (i = args.length - 1; i >= args.length - snapshot.getParameters().size(); i--) {
-            runtimeArgs.addLast(runtimeType(args[i]));
-        }
-
-        //classes known at compile time
+        /*
+         * Create a list of the arg types that the compiler knows about
+         * typically, the runtime args are a lot more specific, and we should aggressively
+         * try to use those whenever possible
+         * We WILL try to make an aggressive guess as possible, and add guards if needed.
+         * For example, if the compiler can deduce that we have a number type, but the runtime
+         * passes and int, we might still want to keep it an int, and the gamble to
+         * check that whatever is passed is int representable usually pays off
+         * If the compiler only knows that a parameter is an "Object", it is still worth
+         * it to try to specialize it by looking at the runtime arg.
+         */
         final LinkedList<Type> compileTimeArgs = new LinkedList<>();
         for (i = callSiteType.parameterCount() - 1; i >= 0 && compileTimeArgs.size() < snapshot.getParameters().size(); i--) {
-            compileTimeArgs.addLast(Type.typeFor(callSiteType.parameterType(i)));
+            compileTimeArgs.addFirst(Type.typeFor(callSiteType.parameterType(i)));
         }
 
-        //the classes known at compile time are a safe to generate as primitives without parameter guards
-        //the classes known at runtime are safe to generate as primitives IFF there are parameter guards
+        /*
+         * The classes known at compile time are a safe to generate as primitives without parameter guards
+         * But the classes known at runtime (if more specific than compile time types) are safe to generate as primitives
+         * IFF there are parameter guards
+         */
         MethodHandle guard = null;
+        final ArrayList<Type> runtimeParamTypes = runtimeType(runtimeType);
+        while (runtimeParamTypes.size() > functionNode.getParameters().size()) {
+            runtimeParamTypes.remove(0);
+        }
         for (i = 0; i < compileTimeArgs.size(); i++) {
-            final Type runtimeType = runtimeArgs.get(i);
-            final Type compileType = compileTimeArgs.get(i);
+            final Type rparam = Type.typeFor(runtimeType.parameterType(i));
+            final Type cparam = compileTimeArgs.get(i);
 
-            if (compileType.isObject() && !runtimeType.isObject()) {
+            if (cparam.isObject() && !rparam.isObject()) {
+                //check that the runtime object is still coercible to the runtime type, because compiler can't prove it's always primitive
                 if (guard == null) {
-                    guard = PARAM_TYPE_GUARD;
-                    guard = MH.insertArguments(guard, 0, compileTimeArgs.toArray(new Type[compileTimeArgs.size()]), runtimeArgs.toArray(new Type[runtimeArgs.size()]));
+                    guard = MH.insertArguments(PARAM_TYPE_GUARD, 0, (Object)runtimeParamTypes.toArray(new Type[runtimeParamTypes.size()]));
                 }
             }
         }
 
-        //System.err.println("Specialized " + name + " " + runtimeArgs + " known=" + compileTimeArgs);
+        Compiler.LOG.info("Callsite specialized ", name, " runtimeType=", runtimeType, " parameters=", snapshot.getParameters(), " args=", Arrays.asList(args));
 
         assert snapshot != null;
         assert snapshot != functionNode;
 
         final Compiler compiler = new Compiler(installer);
-        final FunctionNode compiledSnapshot = compiler.compile(snapshot.setHints(null, new Compiler.Hints(compileTimeArgs.toArray(new Type[compileTimeArgs.size()]))));
 
+        final FunctionNode compiledSnapshot = compiler.compile(
+            snapshot.setHints(
+                null,
+                new Compiler.Hints(runtimeParamTypes.toArray(new Type[runtimeParamTypes.size()]))));
+
+        /*
+         * No matter how narrow your types were, they can never be narrower than Attr during recompile made them. I.e. you
+         * can put an int into the function here, if you see it as a runtime type, but if the function uses a multiplication
+         * on it, it will still need to be a double. At least until we have overflow checks. Similarly, if an int is
+         * passed but it is used as a string, it makes no sense to make the parameter narrower than Object. At least until
+         * the "different types for one symbol in difference places" work is done
+         */
         compiler.install(compiledSnapshot);
 
-        final MethodHandle nmh = addCode(compiledSnapshot, guard, mh);
-
-        return nmh;
+        return addCode(compiledSnapshot, runtimeType, guard, mh);
     }
 
     private static MethodHandle findOwnMH(final String name, final Class<?> rtype, final Class<?>... types) {
diff --git a/src/jdk/nashorn/internal/runtime/ScriptEnvironment.java b/src/jdk/nashorn/internal/runtime/ScriptEnvironment.java
index 0a556f9d..2ca897db 100644
--- a/src/jdk/nashorn/internal/runtime/ScriptEnvironment.java
+++ b/src/jdk/nashorn/internal/runtime/ScriptEnvironment.java
@@ -54,7 +54,7 @@ public final class ScriptEnvironment {
     private final Namespace namespace;
 
     /** Current Options object. */
-    private Options options;
+    private final Options options;
 
     /** Always allow functions as statements */
     public final boolean _anon_functions;
@@ -155,6 +155,9 @@ public final class ScriptEnvironment {
     /** print symbols and their contents for the script */
     public final boolean _print_symbols;
 
+    /** range analysis for known types */
+    public final boolean _range_analysis;
+
     /** is this environment in scripting mode? */
     public final boolean _scripting;
 
@@ -183,7 +186,7 @@ public final class ScriptEnvironment {
      * @param out output print writer
      * @param err error print writer
      */
-    ScriptEnvironment(final Options options, final PrintWriter out, final PrintWriter err) {
+    public ScriptEnvironment(final Options options, final PrintWriter out, final PrintWriter err) {
         this.out = out;
         this.err = err;
         this.namespace = new Namespace();
@@ -219,6 +222,7 @@ public final class ScriptEnvironment {
         _print_parse          = options.getBoolean("print.parse");
         _print_lower_parse    = options.getBoolean("print.lower.parse");
         _print_symbols        = options.getBoolean("print.symbols");
+        _range_analysis       = options.getBoolean("range.analysis");
         _scripting            = options.getBoolean("scripting");
         _strict               = options.getBoolean("strict");
         _version              = options.getBoolean("version");
@@ -258,14 +262,19 @@ public final class ScriptEnvironment {
         }
         this._callsite_flags = callSiteFlags;
 
-        final Option<?> option = options.get("timezone");
-        if (option != null) {
-            this._timezone = (TimeZone)option.getValue();
+        final Option<?> timezoneOption = options.get("timezone");
+        if (timezoneOption != null) {
+            this._timezone = (TimeZone)timezoneOption.getValue();
         } else {
             this._timezone  = TimeZone.getDefault();
         }
 
-        this._locale = Locale.getDefault();
+        final Option<?> localeOption = options.get("locale");
+        if (localeOption != null) {
+            this._locale = (Locale)localeOption.getValue();
+        } else {
+            this._locale = Locale.getDefault();
+        }
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/runtime/ScriptFunctionData.java b/src/jdk/nashorn/internal/runtime/ScriptFunctionData.java
index f83cfa2c..f98817c8 100644
--- a/src/jdk/nashorn/internal/runtime/ScriptFunctionData.java
+++ b/src/jdk/nashorn/internal/runtime/ScriptFunctionData.java
@@ -25,14 +25,13 @@
 
 package jdk.nashorn.internal.runtime;
 
+import static jdk.nashorn.internal.lookup.Lookup.MH;
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
-import static jdk.nashorn.internal.lookup.Lookup.MH;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
-
 import jdk.nashorn.internal.runtime.linker.JavaAdapterFactory;
 
 /**
@@ -92,12 +91,13 @@ public abstract class ScriptFunctionData {
     CompiledFunction bind(final CompiledFunction originalInv, final ScriptFunction fn, final Object self, final Object[] args) {
         final MethodHandle boundInvoker = bindInvokeHandle(originalInv.getInvoker(), fn, self, args);
 
+        //TODO the boundinvoker.type() could actually be more specific here
         if (isConstructor()) {
             ensureConstructor(originalInv);
-            return new CompiledFunction(boundInvoker, bindConstructHandle(originalInv.getConstructor(), fn, args));
+            return new CompiledFunction(boundInvoker.type(), boundInvoker, bindConstructHandle(originalInv.getConstructor(), fn, args));
         }
 
-        return new CompiledFunction(boundInvoker);
+        return new CompiledFunction(boundInvoker.type(), boundInvoker);
     }
 
     /**
@@ -389,7 +389,9 @@ public abstract class ScriptFunctionData {
                 boundInvoker = noArgBoundInvoker;
             }
         } else {
-            final Object[] boundArgs = new Object[Math.min(originalInvoker.type().parameterCount(), args.length + (isTargetBound ? 0 : (needsCallee  ? 2 : 1)))];
+            // If target is already bound, insert additional bound arguments after "this" argument, at position 1.
+            final int argInsertPos = isTargetBound ? 1 : 0;
+            final Object[] boundArgs = new Object[Math.min(originalInvoker.type().parameterCount() - argInsertPos, args.length + (isTargetBound ? 0 : (needsCallee  ? 2 : 1)))];
             int next = 0;
             if (!isTargetBound) {
                 if (needsCallee) {
@@ -403,7 +405,7 @@ public abstract class ScriptFunctionData {
             // "this" will get dropped anyway by the target invoker. We previously asserted that already bound functions
             // don't take a callee parameter, so we can know that the signature is (this[, args...]) therefore args
             // start at position 1. If the function is not bound, we start inserting arguments at position 0.
-            boundInvoker = MH.insertArguments(originalInvoker, isTargetBound ? 1 : 0, boundArgs);
+            boundInvoker = MH.insertArguments(originalInvoker, argInsertPos, boundArgs);
         }
 
         if (isTargetBound) {
diff --git a/src/jdk/nashorn/internal/runtime/ScriptObject.java b/src/jdk/nashorn/internal/runtime/ScriptObject.java
index 61cce7b1..cf89c545 100644
--- a/src/jdk/nashorn/internal/runtime/ScriptObject.java
+++ b/src/jdk/nashorn/internal/runtime/ScriptObject.java
@@ -25,7 +25,6 @@
 
 package jdk.nashorn.internal.runtime;
 
-import static jdk.nashorn.internal.codegen.CompilerConstants.staticCall;
 import static jdk.nashorn.internal.codegen.CompilerConstants.virtualCall;
 import static jdk.nashorn.internal.codegen.CompilerConstants.virtualCallNoLookup;
 import static jdk.nashorn.internal.lookup.Lookup.MH;
@@ -151,17 +150,6 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
     /** Method handle for setting the user accessors of a ScriptObject */
     public static final Call SET_USER_ACCESSORS = virtualCall(ScriptObject.class, "setUserAccessors", void.class, String.class, ScriptFunction.class, ScriptFunction.class);
 
-    /** Method handle for getter for {@link UserAccessorProperty}, given a slot */
-    static final Call USER_ACCESSOR_GETTER = staticCall(MethodHandles.lookup(), ScriptObject.class, "userAccessorGetter", Object.class, ScriptObject.class, int.class, Object.class);
-
-    /** Method handle for setter for {@link UserAccessorProperty}, given a slot */
-    static final Call USER_ACCESSOR_SETTER = staticCall(MethodHandles.lookup(), ScriptObject.class, "userAccessorSetter", void.class, ScriptObject.class, int.class, String.class, Object.class, Object.class);
-
-    private static final MethodHandle INVOKE_UA_GETTER = Bootstrap.createDynamicInvoker("dyn:call", Object.class,
-            Object.class, Object.class);
-    private static final MethodHandle INVOKE_UA_SETTER = Bootstrap.createDynamicInvoker("dyn:call", void.class,
-            Object.class, Object.class, Object.class);
-
     /**
      * Constructor
      */
@@ -699,17 +687,9 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
      * @return New property.
      */
     public final Property addOwnProperty(final String key, final int propertyFlags, final Object value) {
-        final MethodHandle setter = addSpill(key, propertyFlags);
-
-        try {
-            setter.invokeExact((Object)this, value);
-        } catch (final Error|RuntimeException e) {
-            throw e;
-        } catch (final Throwable e) {
-            throw new RuntimeException(e);
-        }
-
-        return getMap().findProperty(key);
+        final Property property = addSpillProperty(key, propertyFlags);
+        property.setObjectValue(this, this, value, false);
+        return property;
     }
 
     /**
@@ -744,15 +724,7 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
         // Erase the property field value with undefined. If the property is defined
         // by user-defined accessors, we don't want to call the setter!!
         if (!(property instanceof UserAccessorProperty)) {
-            try {
-                // make the property value to be undefined
-                //TODO specproperties
-                property.getSetter(Object.class, getMap()).invokeExact((Object)this, (Object)UNDEFINED);
-            } catch (final RuntimeException | Error e) {
-                throw e;
-            } catch (final Throwable t) {
-                throw new RuntimeException(t);
-            }
+            property.setObjectValue(this, this, UNDEFINED, false);
         }
     }
 
@@ -948,18 +920,7 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
       * @return the value of the property
       */
     protected static Object getObjectValue(final FindProperty find) {
-        final MethodHandle getter = find.getGetter(Object.class);
-        if (getter != null) {
-            try {
-                return getter.invokeExact((Object)find.getGetterReceiver());
-            } catch (final Error|RuntimeException e) {
-                throw e;
-            } catch (final Throwable e) {
-                throw new RuntimeException(e);
-            }
-        }
-
-        return UNDEFINED;
+        return find.getObjectValue();
     }
 
     /**
@@ -2087,11 +2048,7 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
             property = addOwnProperty(property);
         } else {
             int i = getMap().getSpillLength();
-            MethodHandle getter = MH.arrayElementGetter(Object[].class);
-            MethodHandle setter = MH.arrayElementSetter(Object[].class);
-            getter = MH.asType(MH.insertArguments(getter, 1, i), Lookup.GET_OBJECT_TYPE);
-            setter = MH.asType(MH.insertArguments(setter, 1, i), Lookup.SET_OBJECT_TYPE);
-            property = new AccessorProperty(key, propertyFlags | Property.IS_SPILL, i, getter, setter);
+            property = new AccessorProperty(key, propertyFlags | Property.IS_SPILL, i);
             notifyPropertyAdded(this, property);
             property = addOwnProperty(property);
             i = property.getSlot();
@@ -2115,20 +2072,15 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
 
     /**
      * Add a spill entry for the given key.
-     * @param key           Property key.
-     * @param propertyFlags Property flags.
+     * @param key Property key.
      * @return Setter method handle.
      */
-    private MethodHandle addSpill(final String key, final int propertyFlags) {
-        final Property spillProperty = addSpillProperty(key, propertyFlags);
+    MethodHandle addSpill(final String key) {
+        final Property spillProperty = addSpillProperty(key, 0);
         final Class<?> type = Object.class;
         return spillProperty.getSetter(type, getMap()); //TODO specfields
     }
 
-    MethodHandle addSpill(final String key) {
-        return addSpill(key, 0);
-    }
-
     /**
      * Make sure arguments are paired correctly, with respect to more parameters than declared,
      * fewer parameters than declared and other things that JavaScript allows. This might involve
@@ -2659,14 +2611,8 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
                 return;
             }
 
-            try {
-                final MethodHandle setter = f.getSetter(Object.class, strict); //TODO specfields
-                setter.invokeExact((Object)f.getSetterReceiver(), value);
-            } catch (final Error|RuntimeException e) {
-                throw e;
-            } catch (final Throwable e) {
-                throw new RuntimeException(e);
-            }
+            f.setObjectValue(value, strict);
+
         } else if (!isExtensible()) {
             if (strict) {
                 throw typeError("object.non.extensible", key, ScriptRuntime.safeToString(this));
@@ -2677,13 +2623,7 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
     }
 
     private void spill(final String key, final Object value) {
-        try {
-            addSpill(key).invokeExact((Object)this, value);
-        } catch (final Error|RuntimeException e) {
-            throw e;
-        } catch (final Throwable e) {
-            throw new RuntimeException(e);
-        }
+        addSpillProperty(key, 0).setObjectValue(this, this, value, false);
     }
 
 
@@ -3217,46 +3157,6 @@ public abstract class ScriptObject extends PropertyListenerManager implements Pr
         return (index < 0 || (index >= spill.length)) ? null : spill[index];
     }
 
-    // User defined getter and setter are always called by "dyn:call". Note that the user
-    // getter/setter may be inherited. If so, proto is bound during lookup. In either
-    // inherited or self case, slot is also bound during lookup. Actual ScriptFunction
-    // to be called is retrieved everytime and applied.
-    @SuppressWarnings("unused")
-    private static Object userAccessorGetter(final ScriptObject proto, final int slot, final Object self) {
-        final ScriptObject container = (proto != null) ? proto : (ScriptObject)self;
-        final Object       func      = container.getSpill(slot);
-
-        if (func instanceof ScriptFunction) {
-            try {
-                return INVOKE_UA_GETTER.invokeExact(func, self);
-            } catch(final Error|RuntimeException t) {
-                throw t;
-            } catch(final Throwable t) {
-                throw new RuntimeException(t);
-            }
-        }
-
-        return UNDEFINED;
-    }
-
-    @SuppressWarnings("unused")
-    private static void userAccessorSetter(final ScriptObject proto, final int slot, final String name, final Object self, final Object value) {
-        final ScriptObject container = (proto != null) ? proto : (ScriptObject)self;
-        final Object       func      = container.getSpill(slot);
-
-        if (func instanceof ScriptFunction) {
-            try {
-                INVOKE_UA_SETTER.invokeExact(func, self, value);
-            } catch(final Error|RuntimeException t) {
-                throw t;
-            } catch(final Throwable t) {
-                throw new RuntimeException(t);
-            }
-        }  else if (name != null) {
-            throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
-        }
-    }
-
     private static MethodHandle findOwnMH(final String name, final Class<?> rtype, final Class<?>... types) {
         final Class<?>   own = ScriptObject.class;
         final MethodType mt  = MH.type(rtype, types);
diff --git a/src/jdk/nashorn/internal/runtime/ScriptRuntime.java b/src/jdk/nashorn/internal/runtime/ScriptRuntime.java
index 216b381c..25dccb7b 100644
--- a/src/jdk/nashorn/internal/runtime/ScriptRuntime.java
+++ b/src/jdk/nashorn/internal/runtime/ScriptRuntime.java
@@ -36,6 +36,7 @@ import java.lang.invoke.MethodHandle;
 import java.lang.reflect.Array;
 import java.util.Collections;
 import java.util.Iterator;
+import java.util.Locale;
 import java.util.NoSuchElementException;
 import java.util.Objects;
 import jdk.internal.dynalink.beans.StaticClass;
@@ -788,7 +789,7 @@ public final class ScriptRuntime {
             return false;
         }
 
-        throw typeError("in.with.non.object", rvalType.toString().toLowerCase());
+        throw typeError("in.with.non.object", rvalType.toString().toLowerCase(Locale.ENGLISH));
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/runtime/ScriptingFunctions.java b/src/jdk/nashorn/internal/runtime/ScriptingFunctions.java
index 596ec1bf..1d046ca9 100644
--- a/src/jdk/nashorn/internal/runtime/ScriptingFunctions.java
+++ b/src/jdk/nashorn/internal/runtime/ScriptingFunctions.java
@@ -46,7 +46,7 @@ import java.util.StringTokenizer;
 public final class ScriptingFunctions {
 
     /** Handle to implementation of {@link ScriptingFunctions#readLine} - Nashorn extension */
-    public static final MethodHandle READLINE = findOwnMH("readLine", Object.class, Object.class);
+    public static final MethodHandle READLINE = findOwnMH("readLine", Object.class, Object.class, Object.class);
 
     /** Handle to implementation of {@link ScriptingFunctions#readFully} - Nashorn extension */
     public static final MethodHandle READFULLY = findOwnMH("readFully",     Object.class, Object.class, Object.class);
@@ -78,13 +78,17 @@ public final class ScriptingFunctions {
      * Nashorn extension: global.readLine (scripting-mode-only)
      * Read one line of input from the standard input.
      *
-     * @param self self reference
+     * @param self   self reference
+     * @param prompt String used as input prompt
      *
      * @return line that was read
      *
      * @throws IOException if an exception occurs
      */
-    public static Object readLine(final Object self) throws IOException {
+    public static Object readLine(final Object self, final Object prompt) throws IOException {
+        if (prompt != UNDEFINED) {
+            System.out.print(JSType.toString(prompt));
+        }
         final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
         return reader.readLine();
     }
diff --git a/src/jdk/nashorn/internal/runtime/SetMethodCreator.java b/src/jdk/nashorn/internal/runtime/SetMethodCreator.java
index 5ff321fc..a6dfce0f 100644
--- a/src/jdk/nashorn/internal/runtime/SetMethodCreator.java
+++ b/src/jdk/nashorn/internal/runtime/SetMethodCreator.java
@@ -183,17 +183,10 @@ final class SetMethodCreator {
     private SetMethod createNewSpillPropertySetter() {
         final int nextSpill = getMap().getSpillLength();
 
-        final Property property = createSpillProperty(nextSpill);
+        final Property property = new AccessorProperty(getName(), Property.IS_SPILL, nextSpill);
         return new SetMethod(createSpillMethodHandle(nextSpill, property), property);
     }
 
-    private Property createSpillProperty(final int nextSpill) {
-        final MethodHandle getter = MH.asType(MH.insertArguments(MH.arrayElementGetter(Object[].class), 1, nextSpill), Lookup.GET_OBJECT_TYPE);
-        final MethodHandle setter = MH.asType(MH.insertArguments(MH.arrayElementSetter(Object[].class), 1, nextSpill), Lookup.SET_OBJECT_TYPE);
-
-        return new AccessorProperty(getName(), Property.IS_SPILL, nextSpill, getter, setter);
-    }
-
     private MethodHandle createSpillMethodHandle(final int nextSpill, Property property) {
         final PropertyMap oldMap = getMap();
         final PropertyMap newMap = getNewMap(property);
diff --git a/src/jdk/nashorn/internal/runtime/UserAccessorProperty.java b/src/jdk/nashorn/internal/runtime/UserAccessorProperty.java
index 75c285a6..5159e653 100644
--- a/src/jdk/nashorn/internal/runtime/UserAccessorProperty.java
+++ b/src/jdk/nashorn/internal/runtime/UserAccessorProperty.java
@@ -26,7 +26,15 @@
 package jdk.nashorn.internal.runtime;
 
 import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+
+import jdk.nashorn.internal.codegen.CompilerConstants;
 import jdk.nashorn.internal.lookup.Lookup;
+import jdk.nashorn.internal.runtime.linker.Bootstrap;
+
+import static jdk.nashorn.internal.codegen.CompilerConstants.staticCall;
+import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
+import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
 
 /**
  * Property with user defined getters/setters. Actual getter and setter
@@ -51,6 +59,22 @@ public final class UserAccessorProperty extends Property {
     /** User defined setter function slot. */
     private final int setterSlot;
 
+    /** Getter method handle */
+    private final static CompilerConstants.Call USER_ACCESSOR_GETTER = staticCall(MethodHandles.lookup(), UserAccessorProperty.class,
+            "userAccessorGetter", Object.class, ScriptObject.class, int.class, Object.class);
+
+    /** Setter method handle */
+    private final static CompilerConstants.Call USER_ACCESSOR_SETTER = staticCall(MethodHandles.lookup(), UserAccessorProperty.class,
+            "userAccessorSetter", void.class, ScriptObject.class, int.class, String.class, Object.class, Object.class);
+
+    /** Dynamic invoker for getter */
+    private static final MethodHandle INVOKE_UA_GETTER = Bootstrap.createDynamicInvoker("dyn:call", Object.class,
+            Object.class, Object.class);
+
+    /** Dynamic invoker for setter */
+    private static final MethodHandle INVOKE_UA_SETTER = Bootstrap.createDynamicInvoker("dyn:call", void.class,
+            Object.class, Object.class, Object.class);
+
     /**
      * Constructor
      *
@@ -134,8 +158,18 @@ public final class UserAccessorProperty extends Property {
     }
 
     @Override
+    protected Object getObjectValue(final ScriptObject self, final ScriptObject owner) {
+        return userAccessorGetter(owner, getGetterSlot(), self);
+    }
+
+    @Override
+    protected void setObjectValue(final ScriptObject self, final ScriptObject owner, final Object value, final boolean strict) {
+        userAccessorSetter(owner, getSetterSlot(), strict ? getKey() : null, self, value);
+    }
+
+    @Override
     public MethodHandle getGetter(final Class<?> type) {
-        return Lookup.filterReturnType(ScriptObject.USER_ACCESSOR_GETTER.methodHandle(), type);
+        return Lookup.filterReturnType(USER_ACCESSOR_GETTER.methodHandle(), type);
     }
 
     @Override
@@ -146,7 +180,7 @@ public final class UserAccessorProperty extends Property {
 
     @Override
     public MethodHandle getSetter(final Class<?> type, final PropertyMap currentMap) {
-        return ScriptObject.USER_ACCESSOR_SETTER.methodHandle();
+        return USER_ACCESSOR_SETTER.methodHandle();
     }
 
     @Override
@@ -155,4 +189,42 @@ public final class UserAccessorProperty extends Property {
         return (value instanceof ScriptFunction) ? (ScriptFunction) value : null;
     }
 
+    // User defined getter and setter are always called by "dyn:call". Note that the user
+    // getter/setter may be inherited. If so, proto is bound during lookup. In either
+    // inherited or self case, slot is also bound during lookup. Actual ScriptFunction
+    // to be called is retrieved everytime and applied.
+    static Object userAccessorGetter(final ScriptObject proto, final int slot, final Object self) {
+        final ScriptObject container = (proto != null) ? proto : (ScriptObject)self;
+        final Object       func      = container.getSpill(slot);
+
+        if (func instanceof ScriptFunction) {
+            try {
+                return INVOKE_UA_GETTER.invokeExact(func, self);
+            } catch(final Error|RuntimeException t) {
+                throw t;
+            } catch(final Throwable t) {
+                throw new RuntimeException(t);
+            }
+        }
+
+        return UNDEFINED;
+    }
+
+    static void userAccessorSetter(final ScriptObject proto, final int slot, final String name, final Object self, final Object value) {
+        final ScriptObject container = (proto != null) ? proto : (ScriptObject)self;
+        final Object       func      = container.getSpill(slot);
+
+        if (func instanceof ScriptFunction) {
+            try {
+                INVOKE_UA_SETTER.invokeExact(func, self, value);
+            } catch(final Error|RuntimeException t) {
+                throw t;
+            } catch(final Throwable t) {
+                throw new RuntimeException(t);
+            }
+        }  else if (name != null) {
+            throw typeError("property.has.no.setter", name, ScriptRuntime.safeToString(self));
+        }
+    }
+
 }
diff --git a/src/jdk/nashorn/internal/runtime/linker/InvokeByName.java b/src/jdk/nashorn/internal/runtime/linker/InvokeByName.java
index 30e91ec3..4bfb6851 100644
--- a/src/jdk/nashorn/internal/runtime/linker/InvokeByName.java
+++ b/src/jdk/nashorn/internal/runtime/linker/InvokeByName.java
@@ -40,7 +40,7 @@ import java.lang.invoke.MethodHandle;
  *     private static final InvokeByName TO_JSON = new InvokeByName("toJSON", Object.class, Object.class, Object.class);
  *     ...
  *     final Object toJSONFn = TO_JSON.getGetter().invokeExact(obj);
- *     value = TO_JSON.getInvoker().invokeExact(toJSON, obj, key);
+ *     value = TO_JSON.getInvoker().invokeExact(toJSONFn, obj, key);
  * </pre>
  * In practice, you can have stronger type assumptions if it makes sense for your code, just remember that you must use
  * the same parameter types as the formal types of the arguments for {@code invokeExact} to work:
@@ -50,7 +50,7 @@ import java.lang.invoke.MethodHandle;
  *     final ScriptObject sobj = (ScriptObject)obj;
  *     final Object toJSONFn = TO_JSON.getGetter().invokeExact(sobj);
  *     if(toJSONFn instanceof ScriptFunction) {
- *         value = TO_JSON.getInvoker().invokeExact(toJSON, sobj, key);
+ *         value = TO_JSON.getInvoker().invokeExact(toJSONFn, sobj, key);
  *     }
  * </pre>
  * Note that in general you will not want to reuse a single instance of this class for implementing more than one call
@@ -59,6 +59,7 @@ import java.lang.invoke.MethodHandle;
  * separate instance of this class for every place.
  */
 public class InvokeByName {
+    private final String name;
     private final MethodHandle getter;
     private final MethodHandle invoker;
 
@@ -81,6 +82,7 @@ public class InvokeByName {
      * @param ptypes the parameter types of the function.
      */
     public InvokeByName(final String name, final Class<?> targetClass, final Class<?> rtype, final Class<?>... ptypes) {
+        this.name = name;
         getter  = Bootstrap.createDynamicInvoker("dyn:getMethod|getProp|getItem:" + name, Object.class, targetClass);
 
         final Class<?>[] finalPtypes;
@@ -97,6 +99,14 @@ public class InvokeByName {
     }
 
     /**
+     * Returns the name of the function retrieved through this invoker.
+     * @return the name of the function retrieved through this invoker.
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
      * Returns the property getter that can be invoked on an object to retrieve the function object that will be
      * subsequently invoked by the invoker returned by {@link #getInvoker()}.
      * @return the property getter method handle for the function.
diff --git a/src/jdk/nashorn/internal/runtime/linker/JSObjectLinker.java b/src/jdk/nashorn/internal/runtime/linker/JSObjectLinker.java
index df9c47ff..edd75e4d 100644
--- a/src/jdk/nashorn/internal/runtime/linker/JSObjectLinker.java
+++ b/src/jdk/nashorn/internal/runtime/linker/JSObjectLinker.java
@@ -38,7 +38,7 @@ import jdk.internal.dynalink.linker.LinkerServices;
 import jdk.internal.dynalink.linker.TypeBasedGuardingDynamicLinker;
 import jdk.internal.dynalink.support.CallSiteDescriptorFactory;
 import jdk.nashorn.internal.runtime.JSType;
-import netscape.javascript.JSObject;
+import jdk.nashorn.api.scripting.JSObject;
 
 /**
  * A Dynalink linker to handle web browser built-in JS (DOM etc.) objects as well
diff --git a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterBytecodeGenerator.java b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterBytecodeGenerator.java
index 37786b1e..1fe76954 100644
--- a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterBytecodeGenerator.java
+++ b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterBytecodeGenerator.java
@@ -310,7 +310,34 @@ final class JavaAdapterBytecodeGenerator extends JavaAdapterGeneratorBase {
                 Type.getMethodDescriptor(Type.VOID_TYPE), null, null));
 
         mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "getClassOverrides", GET_CLASS_INITIALIZER_DESCRIPTOR);
-        // Assign MethodHandle fields through invoking getHandle()
+        final Label initGlobal;
+        if(samName != null) {
+            // If the class is a SAM, allow having a ScriptFunction passed as class overrides
+            final Label notAFunction = new Label();
+            mv.dup();
+            mv.instanceOf(SCRIPT_FUNCTION_TYPE);
+            mv.ifeq(notAFunction);
+            mv.checkcast(SCRIPT_FUNCTION_TYPE);
+
+            // Assign MethodHandle fields through invoking getHandle() for a ScriptFunction, only assigning the SAM
+            // method(s).
+            for (final MethodInfo mi : methodInfos) {
+                if(mi.getName().equals(samName)) {
+                    mv.dup();
+                    mv.aconst(Type.getMethodType(mi.type.toMethodDescriptorString()));
+                    mv.invokestatic(SERVICES_CLASS_TYPE_NAME, "getHandle", GET_HANDLE_FUNCTION_DESCRIPTOR);
+                } else {
+                    mv.visitInsn(ACONST_NULL);
+                }
+                mv.putstatic(generatedClassName, mi.methodHandleClassFieldName, METHOD_HANDLE_TYPE_DESCRIPTOR);
+            }
+            initGlobal = new Label();
+            mv.goTo(initGlobal);
+            mv.visitLabel(notAFunction);
+        } else {
+            initGlobal = null;
+        }
+        // Assign MethodHandle fields through invoking getHandle() for a ScriptObject
         for (final MethodInfo mi : methodInfos) {
             mv.dup();
             mv.aconst(mi.getName());
@@ -319,6 +346,9 @@ final class JavaAdapterBytecodeGenerator extends JavaAdapterGeneratorBase {
             mv.putstatic(generatedClassName, mi.methodHandleClassFieldName, METHOD_HANDLE_TYPE_DESCRIPTOR);
         }
 
+        if(initGlobal != null) {
+            mv.visitLabel(initGlobal);
+        }
         // Assign "staticGlobal = Context.getGlobal()"
         invokeGetGlobalWithNullCheck(mv);
         mv.putstatic(generatedClassName, STATIC_GLOBAL_FIELD_NAME, SCRIPT_OBJECT_TYPE_DESCRIPTOR);
diff --git a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterClassLoader.java b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterClassLoader.java
index c791274e..a3f4718b 100644
--- a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterClassLoader.java
+++ b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterClassLoader.java
@@ -43,6 +43,7 @@ import java.security.Permissions;
 import java.security.PrivilegedAction;
 import java.security.ProtectionDomain;
 import java.security.SecureClassLoader;
+
 import jdk.internal.dynalink.beans.StaticClass;
 import jdk.internal.org.objectweb.asm.ClassWriter;
 import jdk.internal.org.objectweb.asm.Opcodes;
@@ -58,6 +59,7 @@ import jdk.nashorn.internal.runtime.ScriptObject;
  * "class loader", it does not, in fact, extend {@code ClassLoader}, but rather uses them internally. Instances of this
  * class are normally created by {@link JavaAdapterBytecodeGenerator}.
  */
+@SuppressWarnings("javadoc")
 class JavaAdapterClassLoader extends JavaAdapterGeneratorBase {
     private static final Type PRIVILEGED_ACTION_TYPE = Type.getType(PrivilegedAction.class);
 
diff --git a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterFactory.java b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterFactory.java
index f3f51fd8..ecec63bc 100644
--- a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterFactory.java
+++ b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterFactory.java
@@ -39,6 +39,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+
 import jdk.internal.dynalink.beans.StaticClass;
 import jdk.internal.dynalink.support.LinkRequestImpl;
 import jdk.nashorn.internal.objects.NativeJava;
@@ -66,6 +67,7 @@ import jdk.nashorn.internal.runtime.ScriptObject;
  * </p>
  */
 
+@SuppressWarnings("javadoc")
 public final class JavaAdapterFactory {
     /**
      * A mapping from an original Class object to AdapterInfo representing the adapter for the class it represents.
diff --git a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterGeneratorBase.java b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterGeneratorBase.java
index 67499cbc..ff33ba6e 100644
--- a/src/jdk/nashorn/internal/runtime/linker/JavaAdapterGeneratorBase.java
+++ b/src/jdk/nashorn/internal/runtime/linker/JavaAdapterGeneratorBase.java
@@ -33,6 +33,7 @@ import jdk.nashorn.internal.runtime.ScriptObject;
  * Base class for both {@link JavaAdapterBytecodeGenerator} and {@link JavaAdapterClassLoader}, containing those
  * bytecode types, type names and method descriptor that are used by both.
  */
+@SuppressWarnings("javadoc")
 abstract class JavaAdapterGeneratorBase {
     static final Type CONTEXT_TYPE       = Type.getType(Context.class);
     static final Type OBJECT_TYPE        = Type.getType(Object.class);
diff --git a/src/jdk/nashorn/internal/runtime/options/Option.java b/src/jdk/nashorn/internal/runtime/options/Option.java
index ddbeba18..feaff1f1 100644
--- a/src/jdk/nashorn/internal/runtime/options/Option.java
+++ b/src/jdk/nashorn/internal/runtime/options/Option.java
@@ -42,10 +42,6 @@ public class Option<T> {
        this.value = value;
     }
 
-    void setValue(final T value) {
-        this.value = value;
-    }
-
     /**
      * Return the value of an option
      * @return the option value
diff --git a/src/jdk/nashorn/internal/runtime/options/OptionTemplate.java b/src/jdk/nashorn/internal/runtime/options/OptionTemplate.java
index 16ff04ea..4c1c44fc 100644
--- a/src/jdk/nashorn/internal/runtime/options/OptionTemplate.java
+++ b/src/jdk/nashorn/internal/runtime/options/OptionTemplate.java
@@ -25,6 +25,7 @@
 
 package jdk.nashorn.internal.runtime.options;
 
+import java.util.Locale;
 import java.util.TimeZone;
 import jdk.nashorn.internal.runtime.QuotedStringTokenizer;
 
@@ -151,6 +152,9 @@ public class OptionTemplate implements Comparable<OptionTemplate> {
         case "timezone":
             this.defaultValue = TimeZone.getDefault().getID();
             break;
+        case "locale":
+            this.defaultValue = Locale.getDefault().toLanguageTag();
+            break;
         default:
             break;
         }
@@ -263,7 +267,7 @@ public class OptionTemplate implements Comparable<OptionTemplate> {
                     this.params = arg;
                     break;
                 case "type":
-                    this.type = arg.toLowerCase();
+                    this.type = arg.toLowerCase(Locale.ENGLISH);
                     break;
                 case "default":
                     this.defaultValue = arg;
diff --git a/src/jdk/nashorn/internal/runtime/options/Options.java b/src/jdk/nashorn/internal/runtime/options/Options.java
index 286feec9..737c56b4 100644
--- a/src/jdk/nashorn/internal/runtime/options/Options.java
+++ b/src/jdk/nashorn/internal/runtime/options/Options.java
@@ -499,10 +499,10 @@ public final class Options {
         case "timezone":
             // default value "TimeZone.getDefault()"
             return new Option<>(TimeZone.getTimeZone(value));
+        case "locale":
+            return new Option<>(Locale.forLanguageTag(value));
         case "keyvalues":
             return new KeyValueOption(value);
-        case "values":
-            return new ValueOption(value);
         case "log":
             final KeyValueOption kv = new KeyValueOption(value);
             Logging.initialize(kv.getValues());
diff --git a/src/jdk/nashorn/internal/runtime/regexp/DefaultRegExp.java b/src/jdk/nashorn/internal/runtime/regexp/JdkRegExp.java
index e3157ba5..9250331d 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/DefaultRegExp.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/JdkRegExp.java
@@ -41,7 +41,7 @@ import java.util.regex.PatternSyntaxException;
  * Note that this class is not thread-safe as it stores the current match result
  * and the string being matched in instance fields.
  */
-public class DefaultRegExp extends RegExp {
+public class JdkRegExp extends RegExp {
 
     /** Java regexp pattern to use for match. We compile to one of these */
     private Pattern pattern;
@@ -56,7 +56,7 @@ public class DefaultRegExp extends RegExp {
      * @param flags RegExp flag string
      * @throws ParserException if flags is invalid or source string has syntax error.
      */
-    public DefaultRegExp(final String source, final String flags) throws ParserException {
+    public JdkRegExp(final String source, final String flags) throws ParserException {
         super(source, flags);
 
         int intFlags = 0;
diff --git a/src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java b/src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java
index 1047221a..f797b051 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java
@@ -113,7 +113,7 @@ public class JoniRegExp extends RegExp {
     public static class Factory extends RegExpFactory {
 
         @Override
-        protected RegExp compile(final String pattern, final String flags) throws ParserException {
+        public RegExp compile(final String pattern, final String flags) throws ParserException {
             return new JoniRegExp(pattern, flags);
         }
 
diff --git a/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java b/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java
index 4a7ac11b..08168b63 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/RegExpFactory.java
@@ -29,7 +29,7 @@ import jdk.nashorn.internal.runtime.ParserException;
 import jdk.nashorn.internal.runtime.options.Options;
 
 /**
- * Factory class for regular expressions. This class creates instances of {@link DefaultRegExp}.
+ * Factory class for regular expressions. This class creates instances of {@link JdkRegExp}.
  * An alternative factory can be installed using the {@code nashorn.regexp.impl} system property.
  */
 public class RegExpFactory {
@@ -62,8 +62,8 @@ public class RegExpFactory {
      * @return new RegExp
      * @throws ParserException if flags is invalid or pattern string has syntax error.
      */
-    protected RegExp compile(final String pattern, final String flags) throws ParserException {
-        return new DefaultRegExp(pattern, flags);
+    public RegExp compile(final String pattern, final String flags) throws ParserException {
+        return new JdkRegExp(pattern, flags);
     }
 
     /**
diff --git a/src/jdk/nashorn/internal/runtime/regexp/RegExpScanner.java b/src/jdk/nashorn/internal/runtime/regexp/RegExpScanner.java
index 956a99d7..52829fac 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/RegExpScanner.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/RegExpScanner.java
@@ -868,6 +868,9 @@ final class RegExpScanner extends Scanner {
      *      \ ClassEscape
      */
     private boolean classAtomNoDash() {
+        if (atEOF()) {
+            return false;
+        }
         final int startIn  = position;
         final int startOut = sb.length();
 
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Analyser.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Analyser.java
index 49a2a925..c0dbf0d8 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Analyser.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Analyser.java
@@ -21,10 +21,7 @@ package jdk.nashorn.internal.runtime.regexp.joni;
 
 import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsAll;
 import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsAt;
-import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsClear;
 import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsOnAt;
-import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsOnAtSimple;
-import static jdk.nashorn.internal.runtime.regexp.joni.Option.isCaptureGroup;
 import static jdk.nashorn.internal.runtime.regexp.joni.Option.isFindCondition;
 import static jdk.nashorn.internal.runtime.regexp.joni.Option.isIgnoreCase;
 import static jdk.nashorn.internal.runtime.regexp.joni.Option.isMultiline;
@@ -36,8 +33,6 @@ import java.util.HashSet;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.AnchorNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.BackRefNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.CClassNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CTypeNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CallNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.ConsAltNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.EncloseNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.Node;
@@ -49,9 +44,7 @@ import jdk.nashorn.internal.runtime.regexp.joni.constants.NodeType;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.RegexState;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.StackPopLevel;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.TargetInfo;
-import jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType;
 import jdk.nashorn.internal.runtime.regexp.joni.encoding.ObjPtr;
-import jdk.nashorn.internal.runtime.regexp.joni.encoding.Ptr;
 
 final class Analyser extends Parser {
 
@@ -74,38 +67,9 @@ final class Analyser extends Parser {
         //regex.repeatRangeAlloc = 0;
         regex.repeatRangeLo = null;
         regex.repeatRangeHi = null;
-        regex.numCombExpCheck = 0;
-
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) regex.numCombExpCheck = 0;
 
         parse();
 
-        if (Config.USE_NAMED_GROUP) {
-            /* mixed use named group and no-named group */
-            if (env.numNamed > 0 && syntax.captureOnlyNamedGroup() && !isCaptureGroup(regex.options)) {
-                if (env.numNamed != env.numMem) {
-                    root = disableNoNameGroupCapture(root);
-                } else {
-                    numberedRefCheck(root);
-                }
-            }
-        } // USE_NAMED_GROUP
-
-        if (Config.USE_NAMED_GROUP) {
-            if (env.numCall > 0) {
-                env.unsetAddrList = new UnsetAddrList(env.numCall);
-                setupSubExpCall(root);
-                // r != 0 ???
-                subexpRecursiveCheckTrav(root);
-                // r < 0 -< err, FOUND_CALLED_NODE = 1
-                subexpInfRecursiveCheckTrav(root);
-                // r != 0  recursion infinite ???
-                regex.numCall = env.numCall;
-            } else {
-                regex.numCall = 0;
-            }
-        } // USE_NAMED_GROUP
-
         if (Config.DEBUG_PARSE_TREE_RAW && Config.DEBUG_PARSE_TREE) {
             Config.log.println("<RAW TREE>");
             Config.log.println(root + "\n");
@@ -129,27 +93,6 @@ final class Analyser extends Parser {
             regex.btMemEnd |= regex.captureHistory;
         }
 
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-            if (env.backrefedMem == 0 || (Config.USE_SUBEXP_CALL && env.numCall == 0)) {
-                setupCombExpCheck(root, 0);
-
-                if (Config.USE_SUBEXP_CALL && env.hasRecursion) {
-                    env.numCombExpCheck = 0;
-                } else { // USE_SUBEXP_CALL
-                    if (env.combExpMaxRegNum > 0) {
-                        for (int i=1; i<env.combExpMaxRegNum; i++) {
-                            if (bsAt(env.backrefedMem, i)) {
-                                env.numCombExpCheck = 0;
-                                break;
-                            }
-                        }
-                    }
-                }
-
-            } // USE_SUBEXP_CALL
-            regex.numCombExpCheck = env.numCombExpCheck;
-        } // USE_COMBINATION_EXPLOSION_CHECK
-
         regex.clearOptimizeInfo();
 
         if (!Config.DONT_OPTIMIZE) setOptimizedInfoFromTree(root);
@@ -167,7 +110,6 @@ final class Analyser extends Parser {
         }
 
         if (Config.DEBUG_COMPILE) {
-            if (Config.USE_NAMED_GROUP) Config.log.print(regex.nameTableToString());
             Config.log.println("stack used: " + regex.stackNeeded);
             if (Config.USE_STRING_TEMPLATES) Config.log.print("templates: " + regex.templateNum + "\n");
             Config.log.println(new ByteCodePrinter(regex).byteCodeListToString());
@@ -177,157 +119,6 @@ final class Analyser extends Parser {
         regex.state = RegexState.NORMAL;
     }
 
-    private void noNameDisableMapFor_cosAlt(Node node, int[]map, Ptr counter) {
-        ConsAltNode can = (ConsAltNode)node;
-        do {
-            can.setCar(noNameDisableMap(can.car, map, counter));
-        } while ((can = can.cdr) != null);
-    }
-
-    private void noNameDisableMapFor_quantifier(Node node, int[]map, Ptr counter) {
-        QuantifierNode qn = (QuantifierNode)node;
-        Node target = qn.target;
-        Node old = target;
-        target = noNameDisableMap(target, map, counter);
-
-        if (target != old) {
-            qn.setTarget(target);
-            if (target.getType() == NodeType.QTFR) qn.reduceNestedQuantifier((QuantifierNode)target);
-        }
-    }
-
-    private Node noNameDisableMapFor_enclose(Node node, int[]map, Ptr counter) {
-        EncloseNode en = (EncloseNode)node;
-        if (en.type == EncloseType.MEMORY) {
-            if (en.isNamedGroup()) {
-                counter.p++;
-                map[en.regNum] = counter.p;
-                en.regNum = counter.p;
-                //en.target = noNameDisableMap(en.target, map, counter);
-                en.setTarget(noNameDisableMap(en.target, map, counter)); // ???
-            } else {
-                node = en.target;
-                en.target = null; // remove first enclose: /(a)(?<b>c)/
-                node = noNameDisableMap(node, map, counter);
-            }
-        } else {
-            //en.target = noNameDisableMap(en.target, map, counter);
-            en.setTarget(noNameDisableMap(en.target, map, counter)); // ???
-        }
-        return node;
-    }
-
-    private void noNameDisableMapFor_anchor(Node node, int[]map, Ptr counter) {
-        AnchorNode an = (AnchorNode)node;
-        switch (an.type) {
-            case AnchorNode.PREC_READ:
-            case AnchorNode.PREC_READ_NOT:
-            case AnchorNode.LOOK_BEHIND:
-            case AnchorNode.LOOK_BEHIND_NOT:
-                an.setTarget(noNameDisableMap(an.target, map, counter));
-        }
-    }
-
-    private Node noNameDisableMap(Node node, int[]map, Ptr counter) {
-        switch (node.getType()) {
-        case NodeType.LIST:
-        case NodeType.ALT:
-            noNameDisableMapFor_cosAlt(node, map, counter);
-            break;
-        case NodeType.QTFR:
-            noNameDisableMapFor_quantifier(node, map, counter);
-            break;
-        case NodeType.ENCLOSE:
-            node = noNameDisableMapFor_enclose(node, map, counter);
-            break;
-        case NodeType.ANCHOR:
-            noNameDisableMapFor_anchor(node, map, counter);
-            break;
-        } // switch
-        return node;
-    }
-
-    private void renumberByMap(Node node, int[]map) {
-        switch (node.getType()) {
-        case NodeType.LIST:
-        case NodeType.ALT:
-            ConsAltNode can = (ConsAltNode)node;
-            do {
-                renumberByMap(can.car, map);
-            } while ((can = can.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            renumberByMap(((QuantifierNode)node).target, map);
-            break;
-
-        case NodeType.ENCLOSE:
-            renumberByMap(((EncloseNode)node).target, map);
-            break;
-
-        case NodeType.BREF:
-            ((BackRefNode)node).renumber(map);
-            break;
-        } // switch
-    }
-
-    protected final void numberedRefCheck(Node node) {
-        switch (node.getType()) {
-        case NodeType.LIST:
-        case NodeType.ALT:
-            ConsAltNode can = (ConsAltNode)node;
-            do {
-                numberedRefCheck(can.car);
-            } while ((can = can.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            numberedRefCheck(((QuantifierNode)node).target);
-            break;
-
-        case NodeType.ENCLOSE:
-            numberedRefCheck(((EncloseNode)node).target);
-            break;
-
-        case NodeType.BREF:
-            BackRefNode br = (BackRefNode)node;
-            if (!br.isNameRef()) newValueException(ERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED);
-            break;
-        } // switch
-    }
-
-    protected final Node disableNoNameGroupCapture(Node root) {
-        int[]map = new int[env.numMem + 1];
-
-        for (int i=1; i<=env.numMem; i++) map[i] = 0;
-
-        root = noNameDisableMap(root, map, new Ptr(0));
-        renumberByMap(root, map);
-
-        for (int i=1, pos=1; i<=env.numMem; i++) {
-            if (map[i] > 0) {
-                env.memNodes[pos] = env.memNodes[i];
-                pos++;
-            }
-        }
-
-        int loc = env.captureHistory;
-        env.captureHistory = bsClear();
-
-        for (int i=1; i<=Config.MAX_CAPTURE_HISTORY_GROUP; i++) {
-            if (bsAt(loc, i)) {
-                env.captureHistory = bsOnAtSimple(env.captureHistory, map[i]);
-            }
-        }
-
-        env.numMem = env.numNamed;
-        regex.numMem = env.numNamed;
-
-        regex.renumberNameTable(map);
-
-        return root;
-    }
-
     private void swap(Node a, Node b) {
         a.swap(b);
 
@@ -352,17 +143,6 @@ final class Analyser extends Parser {
             } while ((can = can.cdr) != null);
             break;
 
-        case NodeType.CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                CallNode cn = (CallNode)node;
-                if (cn.isRecursion()) {
-                    return TargetInfo.IS_EMPTY_REC; /* tiny version */
-                } else {
-                    info = quantifiersMemoryInfo(cn.target);
-                }
-            } // USE_SUBEXP_CALL
-            break;
-
         case NodeType.QTFR:
             QuantifierNode qn = (QuantifierNode)node;
             if (qn.upper != 0) {
@@ -417,18 +197,6 @@ final class Analyser extends Parser {
             }
             break;
 
-        case NodeType.CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                CallNode cn = (CallNode)node;
-                if (cn.isRecursion()) {
-                    EncloseNode en = (EncloseNode)cn.target;
-                    if (en.isMinFixed()) min = en.minLength;
-                } else {
-                    min = getMinMatchLength(cn.target);
-                }
-            } // USE_SUBEXP_CALL
-            break;
-
         case NodeType.LIST:
             ConsAltNode can = (ConsAltNode)node;
             do {
@@ -474,15 +242,13 @@ final class Analyser extends Parser {
             EncloseNode en = (EncloseNode)node;
             switch (en.type) {
             case EncloseType.MEMORY:
-                if (Config.USE_SUBEXP_CALL) {
-                    if (en.isMinFixed()) {
-                        min = en.minLength;
-                    } else {
-                        min = getMinMatchLength(en.target);
-                        en.minLength = min;
-                        en.setMinFixed();
-                    }
-                } // USE_SUBEXP_CALL
+                if (en.isMinFixed()) {
+                    min = en.minLength;
+                } else {
+                    min = getMinMatchLength(en.target);
+                    en.minLength = min;
+                    en.setMinFixed();
+                }
                 break;
 
             case EncloseType.OPTION:
@@ -547,17 +313,6 @@ final class Analyser extends Parser {
             }
             break;
 
-        case NodeType.CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                CallNode cn = (CallNode)node;
-                if (!cn.isRecursion()) {
-                    max = getMaxMatchLength(cn.target);
-                } else {
-                    max = MinMaxLen.INFINITE_DISTANCE;
-                }
-            } // USE_SUBEXP_CALL
-            break;
-
         case NodeType.QTFR:
             QuantifierNode qn = (QuantifierNode)node;
             if (qn.upper != 0) {
@@ -576,15 +331,13 @@ final class Analyser extends Parser {
             EncloseNode en = (EncloseNode)node;
             switch (en.type) {
             case EncloseType.MEMORY:
-                if (Config.USE_SUBEXP_CALL) {
-                    if (en.isMaxFixed()) {
-                        max = en.maxLength;
-                    } else {
-                        max = getMaxMatchLength(en.target);
-                        en.maxLength = max;
-                        en.setMaxFixed();
-                    }
-                } // USE_SUBEXP_CALL
+                if (en.isMaxFixed()) {
+                    max = en.maxLength;
+                } else {
+                    max = getMaxMatchLength(en.target);
+                    en.maxLength = max;
+                    en.setMaxFixed();
+                }
                 break;
 
             case EncloseType.OPTION:
@@ -663,17 +416,6 @@ final class Analyser extends Parser {
             }
             break;
 
-        case NodeType.CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                CallNode cn = (CallNode)node;
-                if (!cn.isRecursion()) {
-                    len = getCharLengthTree(cn.target, level);
-                } else {
-                    returnCode = GET_CHAR_LEN_VARLEN;
-                }
-            } // USE_SUBEXP_CALL
-            break;
-
         case NodeType.CTYPE:
             len = 1;
 
@@ -686,17 +428,15 @@ final class Analyser extends Parser {
             EncloseNode en = (EncloseNode)node;
             switch(en.type) {
             case EncloseType.MEMORY:
-                if (Config.USE_SUBEXP_CALL) {
-                    if (en.isCLenFixed()) {
-                        len = en.charLength;
-                    } else {
-                        len = getCharLengthTree(en.target, level);
-                        if (returnCode == 0) {
-                            en.charLength = len;
-                            en.setCLenFixed();
-                        }
+                if (en.isCLenFixed()) {
+                    len = en.charLength;
+                } else {
+                    len = getCharLengthTree(en.target, level);
+                    if (returnCode == 0) {
+                        en.charLength = len;
+                        en.setCLenFixed();
                     }
-                } // USE_SUBEXP_CALL
+                }
                 break;
 
             case EncloseType.OPTION:
@@ -727,10 +467,6 @@ final class Analyser extends Parser {
         switch(x.getType()) {
         case NodeType.CTYPE:
             switch(yType) {
-            case NodeType.CTYPE:
-                CTypeNode cny = (CTypeNode)y;
-                CTypeNode cnx = (CTypeNode)x;
-                return cny.ctype == cnx.ctype && cny.not != cnx.not;
 
             case NodeType.CCLASS:
                 // !swap:!
@@ -756,37 +492,6 @@ final class Analyser extends Parser {
             CClassNode xc = (CClassNode)x;
 
             switch(yType) {
-            case NodeType.CTYPE:
-                switch(((CTypeNode)y).ctype) {
-                case CharacterType.WORD:
-                    if (!((CTypeNode)y).not) {
-                        if (xc.mbuf == null && !xc.isNot()) {
-                            for (int i=0; i<BitSet.SINGLE_BYTE_SIZE; i++) {
-                                if (xc.bs.at(i)) {
-                                    if (EncodingHelper.isWord(i)) return false;
-                                }
-                            }
-                            return true;
-                        }
-                        return false;
-                    } else {
-                        for (int i=0; i<BitSet.SINGLE_BYTE_SIZE; i++) {
-                            if (!EncodingHelper.isWord(i)) {
-                                if (!xc.isNot()) {
-                                    if (xc.bs.at(i)) return false;
-                                } else {
-                                    if (!xc.bs.at(i)) return false;
-                                }
-                            }
-                        }
-                        return true;
-                    }
-                    // break; not reached
-
-                default:
-                    break;
-                } // inner switch
-                break;
 
             case NodeType.CCLASS:
                 CClassNode yc = (CClassNode)y;
@@ -820,17 +525,6 @@ final class Analyser extends Parser {
             if (xs.length() == 0) break;
 
             switch (yType) {
-            case NodeType.CTYPE:
-                CTypeNode cy = ((CTypeNode)y);
-                switch (cy.ctype) {
-                case CharacterType.WORD:
-                    return !cy.not;
-
-                default:
-                    break;
-
-                } // inner switch
-                break;
 
             case NodeType.CCLASS:
                 CClassNode cc = (CClassNode)y;
@@ -873,9 +567,6 @@ final class Analyser extends Parser {
         case NodeType.CANY:
             break;
 
-        case NodeType.CALL:
-            break; // if (Config.USE_SUBEXP_CALL)
-
         case NodeType.CTYPE:
         case NodeType.CCLASS:
             if (!exact) n = node;
@@ -977,316 +668,6 @@ final class Analyser extends Parser {
         return invalid;
     }
 
-    private static final int RECURSION_EXIST       = 1;
-    private static final int RECURSION_INFINITE    = 2;
-    private int subexpInfRecursiveCheck(Node node, boolean head) {
-        int r = 0;
-
-        switch (node.getType()) {
-        case NodeType.LIST:
-            int min;
-            ConsAltNode x = (ConsAltNode)node;
-            do {
-                int ret = subexpInfRecursiveCheck(x.car, head);
-                if (ret == RECURSION_INFINITE) return ret;
-                r |= ret;
-                if (head) {
-                    min = getMinMatchLength(x.car);
-                    if (min != 0) head = false;
-                }
-            } while ((x = x.cdr) != null);
-            break;
-
-        case NodeType.ALT:
-            ConsAltNode can = (ConsAltNode)node;
-            r = RECURSION_EXIST;
-            do {
-                int ret = subexpInfRecursiveCheck(can.car, head);
-                if (ret == RECURSION_INFINITE) return ret;
-                r &= ret;
-            } while ((can = can.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            QuantifierNode qn = (QuantifierNode)node;
-            r = subexpInfRecursiveCheck(qn.target, head);
-            if (r == RECURSION_EXIST) {
-                if (qn.lower == 0) r = 0;
-            }
-            break;
-
-        case NodeType.ANCHOR:
-            AnchorNode an = (AnchorNode)node;
-            switch (an.type) {
-            case AnchorType.PREC_READ:
-            case AnchorType.PREC_READ_NOT:
-            case AnchorType.LOOK_BEHIND:
-            case AnchorType.LOOK_BEHIND_NOT:
-                r = subexpInfRecursiveCheck(an.target, head);
-                break;
-            } // inner switch
-            break;
-
-        case NodeType.CALL:
-            r = subexpInfRecursiveCheck(((CallNode)node).target, head);
-            break;
-
-        case NodeType.ENCLOSE:
-            EncloseNode en = (EncloseNode)node;
-            if (en.isMark2()) {
-                return 0;
-            } else if (en.isMark1()) {
-                return !head ? RECURSION_EXIST : RECURSION_INFINITE;
-                // throw exception here ???
-            } else {
-                en.setMark2();
-                r = subexpInfRecursiveCheck(en.target, head);
-                en.clearMark2();
-            }
-            break;
-
-        default:
-            break;
-        } // switch
-        return r;
-    }
-
-    protected final int subexpInfRecursiveCheckTrav(Node node) {
-        int r = 0;
-
-        switch (node.getType()) {
-        case NodeType.LIST:
-        case NodeType.ALT:
-            ConsAltNode can = (ConsAltNode)node;
-            do {
-                r = subexpInfRecursiveCheckTrav(can.car);
-            } while (r == 0 && (can = can.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            r = subexpInfRecursiveCheckTrav(((QuantifierNode)node).target);
-            break;
-
-        case NodeType.ANCHOR:
-            AnchorNode an = (AnchorNode)node;
-            switch (an.type) {
-            case AnchorType.PREC_READ:
-            case AnchorType.PREC_READ_NOT:
-            case AnchorType.LOOK_BEHIND:
-            case AnchorType.LOOK_BEHIND_NOT:
-                r = subexpInfRecursiveCheckTrav(an.target);
-                break;
-            } // inner switch
-            break;
-
-        case NodeType.ENCLOSE:
-            EncloseNode en = (EncloseNode)node;
-            if (en.isRecursion()) {
-                en.setMark1();
-                r = subexpInfRecursiveCheck(en.target, true);
-                if (r > 0) newValueException(ERR_NEVER_ENDING_RECURSION);
-                en.clearMark1();
-            }
-            r = subexpInfRecursiveCheckTrav(en.target);
-            break;
-
-        default:
-            break;
-        } // switch
-
-        return r;
-    }
-
-    private int subexpRecursiveCheck(Node node) {
-        int r = 0;
-
-        switch (node.getType()) {
-        case NodeType.LIST:
-        case NodeType.ALT:
-            ConsAltNode can = (ConsAltNode)node;
-            do {
-                r |= subexpRecursiveCheck(can.car);
-            } while ((can = can.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            r = subexpRecursiveCheck(((QuantifierNode)node).target);
-            break;
-
-        case NodeType.ANCHOR:
-            AnchorNode an = (AnchorNode)node;
-            switch (an.type) {
-            case AnchorType.PREC_READ:
-            case AnchorType.PREC_READ_NOT:
-            case AnchorType.LOOK_BEHIND:
-            case AnchorType.LOOK_BEHIND_NOT:
-                r = subexpRecursiveCheck(an.target);
-                break;
-            } // inner switch
-            break;
-
-        case NodeType.CALL:
-            CallNode cn = (CallNode)node;
-            r = subexpRecursiveCheck(cn.target);
-            if (r != 0) cn.setRecursion();
-            break;
-
-        case NodeType.ENCLOSE:
-            EncloseNode en = (EncloseNode)node;
-            if (en.isMark2()) {
-                return 0;
-            } else if (en.isMark1()) {
-                return 1; /* recursion */
-            } else {
-                en.setMark2();
-                r = subexpRecursiveCheck(en.target);
-                en.clearMark2();
-            }
-            break;
-
-        default:
-            break;
-        } // switch
-
-        return r;
-    }
-
-    private static final int FOUND_CALLED_NODE  = 1;
-    protected final int subexpRecursiveCheckTrav(Node node) {
-        int r = 0;
-
-        switch (node.getType()) {
-        case NodeType.LIST:
-        case NodeType.ALT:
-            ConsAltNode can = (ConsAltNode)node;
-            do {
-                int ret = subexpRecursiveCheckTrav(can.car);
-                if (ret == FOUND_CALLED_NODE) {
-                    r = FOUND_CALLED_NODE;
-                }
-                // else if (ret < 0) return ret; ???
-            } while ((can = can.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            QuantifierNode qn = (QuantifierNode)node;
-            r = subexpRecursiveCheckTrav(qn.target);
-            if (qn.upper == 0) {
-                if (r == FOUND_CALLED_NODE) qn.isRefered = true;
-            }
-            break;
-
-        case NodeType.ANCHOR:
-            AnchorNode an = (AnchorNode)node;
-            switch (an.type) {
-            case AnchorType.PREC_READ:
-            case AnchorType.PREC_READ_NOT:
-            case AnchorType.LOOK_BEHIND:
-            case AnchorType.LOOK_BEHIND_NOT:
-                r = subexpRecursiveCheckTrav(an.target);
-                break;
-            } // inner switch
-            break;
-
-        case NodeType.ENCLOSE:
-            EncloseNode en = (EncloseNode)node;
-            if (!en.isRecursion()) {
-                if (en.isCalled()) {
-                    en.setMark1();
-                    r = subexpRecursiveCheck(en.target);
-                    if (r != 0) en.setRecursion();
-                    en.clearMark1();
-                }
-            }
-            r = subexpRecursiveCheckTrav(en.target);
-            if (en.isCalled()) r |= FOUND_CALLED_NODE;
-            break;
-
-        default:
-            break;
-        } // switch
-
-        return r;
-    }
-
-    private void setCallAttr(CallNode cn) {
-        cn.target = env.memNodes[cn.groupNum]; // no setTarget in call nodes!
-        if (cn.target == null) newValueException(ERR_UNDEFINED_NAME_REFERENCE, cn.nameP, cn.nameEnd);
-
-        ((EncloseNode)cn.target).setCalled();
-        env.btMemStart = BitStatus.bsOnAt(env.btMemStart, cn.groupNum);
-        cn.unsetAddrList = env.unsetAddrList;
-    }
-
-    protected final void setupSubExpCall(Node node) {
-
-        switch(node.getType()) {
-        case NodeType.LIST:
-            ConsAltNode ln = (ConsAltNode)node;
-            do {
-                setupSubExpCall(ln.car);
-            } while ((ln = ln.cdr) != null);
-            break;
-
-        case NodeType.ALT:
-            ConsAltNode can = (ConsAltNode)node;
-            do {
-                setupSubExpCall(can.car);
-            } while ((can = can.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            setupSubExpCall(((QuantifierNode)node).target);
-            break;
-
-        case NodeType.ENCLOSE:
-            setupSubExpCall(((EncloseNode)node).target);
-            break;
-
-        case NodeType.CALL:
-            CallNode cn = (CallNode)node;
-
-            if (cn.groupNum != 0) {
-                int gNum = cn.groupNum;
-
-                if (Config.USE_NAMED_GROUP) {
-                    if (env.numNamed > 0 && syntax.captureOnlyNamedGroup() && !isCaptureGroup(env.option)) {
-                        newValueException(ERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED);
-                    }
-                } // USE_NAMED_GROUP
-                if (gNum > env.numMem) newValueException(ERR_UNDEFINED_GROUP_REFERENCE, cn.nameP, cn.nameEnd);
-                setCallAttr(cn);
-            } else {
-                if (Config.USE_NAMED_GROUP) {
-                    NameEntry ne = regex.nameToGroupNumbers(cn.name, cn.nameP, cn.nameEnd);
-
-                    if (ne == null) {
-                        newValueException(ERR_UNDEFINED_NAME_REFERENCE, cn.nameP, cn.nameEnd);
-                    } else if (ne.backNum > 1) {
-                        newValueException(ERR_MULTIPLEX_DEFINITION_NAME_CALL, cn.nameP, cn.nameEnd);
-                    } else {
-                        cn.groupNum = ne.backRef1; // ne.backNum == 1 ? ne.backRef1 : ne.backRefs[0]; // ??? need to check ?
-                        setCallAttr(cn);
-                    }
-                }
-            }
-            break;
-
-        case NodeType.ANCHOR:
-            AnchorNode an = (AnchorNode)node;
-            switch (an.type) {
-            case AnchorType.PREC_READ:
-            case AnchorType.PREC_READ_NOT:
-            case AnchorType.LOOK_BEHIND:
-            case AnchorType.LOOK_BEHIND_NOT:
-                setupSubExpCall(an.target);
-                break;
-            }
-            break;
-
-        } // switch
-    }
-
     /* divide different length alternatives in look-behind.
     (?<=A|B) ==> (?<=A)|(?<=B)
     (?<!A|B) ==> (?<!A)(?<!B)
@@ -1523,125 +904,6 @@ final class Analyser extends Parser {
         return xnode;
     }
 
-    private static final int CEC_THRES_NUM_BIG_REPEAT       = 512;
-    private static final int CEC_INFINITE_NUM               = 0x7fffffff;
-
-    private static final int CEC_IN_INFINITE_REPEAT         = (1<<0);
-    private static final int CEC_IN_FINITE_REPEAT           = (1<<1);
-    private static final int CEC_CONT_BIG_REPEAT            = (1<<2);
-
-    protected final int setupCombExpCheck(Node node, int state) {
-        int r = state;
-        int ret;
-
-        switch (node.getType()) {
-        case NodeType.LIST:
-            ConsAltNode ln = (ConsAltNode)node;
-
-            do {
-                r = setupCombExpCheck(ln.car, r);
-                //prev = ((ConsAltNode)node).car;
-            } while (r >= 0 && (ln = ln.cdr) != null);
-            break;
-
-        case NodeType.ALT:
-            ConsAltNode an = (ConsAltNode)node;
-            do {
-                ret = setupCombExpCheck(an.car, state);
-                r |= ret;
-            } while (ret >= 0 && (an = an.cdr) != null);
-            break;
-
-        case NodeType.QTFR:
-            QuantifierNode qn = (QuantifierNode)node;
-            int childState = state;
-            int addState = 0;
-            int varNum;
-
-            if (!isRepeatInfinite(qn.upper)) {
-                if (qn.upper > 1) {
-                    /* {0,1}, {1,1} are allowed */
-                    childState |= CEC_IN_FINITE_REPEAT;
-
-                    /* check (a*){n,m}, (a+){n,m} => (a*){n,n}, (a+){n,n} */
-                    if (env.backrefedMem == 0) {
-                        if (qn.target.getType() == NodeType.ENCLOSE) {
-                            EncloseNode en = (EncloseNode)qn.target;
-                            if (en.type == EncloseType.MEMORY) {
-                                if (en.target.getType() == NodeType.QTFR) {
-                                    QuantifierNode q = (QuantifierNode)en.target;
-                                    if (isRepeatInfinite(q.upper) && q.greedy == qn.greedy) {
-                                        qn.upper = qn.lower == 0 ? 1 : qn.lower;
-                                        if (qn.upper == 1) childState = state;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-
-            if ((state & CEC_IN_FINITE_REPEAT) != 0) {
-                qn.combExpCheckNum = -1;
-            } else {
-                if (isRepeatInfinite(qn.upper)) {
-                    varNum = CEC_INFINITE_NUM;
-                    childState |= CEC_IN_INFINITE_REPEAT;
-                } else {
-                    varNum = qn.upper - qn.lower;
-                }
-
-                if (varNum >= CEC_THRES_NUM_BIG_REPEAT) addState |= CEC_CONT_BIG_REPEAT;
-
-                if (((state & CEC_IN_INFINITE_REPEAT) != 0 && varNum != 0) ||
-                   ((state & CEC_CONT_BIG_REPEAT) != 0 && varNum >= CEC_THRES_NUM_BIG_REPEAT)) {
-                    if (qn.combExpCheckNum == 0) {
-                        env.numCombExpCheck++;
-                        qn.combExpCheckNum = env.numCombExpCheck;
-                        if (env.currMaxRegNum > env.combExpMaxRegNum) {
-                            env.combExpMaxRegNum = env.currMaxRegNum;
-                        }
-                    }
-                }
-            }
-            r = setupCombExpCheck(qn.target, childState);
-            r |= addState;
-            break;
-
-        case NodeType.ENCLOSE:
-            EncloseNode en = (EncloseNode)node;
-            switch( en.type) {
-            case EncloseNode.MEMORY:
-                if (env.currMaxRegNum < en.regNum) {
-                    env.currMaxRegNum = en.regNum;
-                }
-                r = setupCombExpCheck(en.target, state);
-                break;
-
-            default:
-                r = setupCombExpCheck(en.target, state);
-            } // inner switch
-            break;
-
-        case NodeType.CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                CallNode cn = (CallNode)node;
-                if (cn.isRecursion()) {
-                    env.hasRecursion = true;
-                } else {
-                    r = setupCombExpCheck(cn.target, state);
-                }
-            } // USE_SUBEXP_CALL
-            break;
-
-        default:
-            break;
-
-        } // switch
-
-        return r;
-    }
-
     private static final int IN_ALT                     = (1<<0);
     private static final int IN_NOT                     = (1<<1);
     private static final int IN_REPEAT                  = (1<<2);
@@ -1691,20 +953,12 @@ final class Analyser extends Parser {
         case NodeType.CANY:
             break;
 
-        case NodeType.CALL: // if (Config.USE_SUBEXP_CALL) ?
-            break;
-
         case NodeType.BREF:
             BackRefNode br = (BackRefNode)node;
             for (int i=0; i<br.backNum; i++) {
                 if (br.back[i] > env.numMem) newValueException(ERR_INVALID_BACKREF);
                 env.backrefedMem = bsOnAt(env.backrefedMem, br.back[i]);
                 env.btMemStart = bsOnAt(env.btMemStart, br.back[i]);
-                if (Config.USE_BACKREF_WITH_LEVEL) {
-                    if (br.isNestLevel()) {
-                        env.btMemEnd = bsOnAt(env.btMemEnd, br.back[i]);
-                    }
-                } // USE_BACKREF_AT_LEVEL
                 ((EncloseNode)env.memNodes[br.back[i]]).setMemBackrefed();
             }
             break;
@@ -1916,37 +1170,6 @@ final class Analyser extends Parser {
             break;
         }
 
-        case NodeType.CTYPE: {
-            int min;
-            int max = 1;
-            if (max == 1) {
-                min = 1;
-                CTypeNode cn = (CTypeNode)node;
-
-                switch (cn.ctype) {
-                case CharacterType.WORD:
-                    if (cn.not) {
-                        for (int i=0; i<BitSet.SINGLE_BYTE_SIZE; i++) {
-                            if (!EncodingHelper.isWord(i)) {
-                                opt.map.addChar(i);
-                            }
-                        }
-                    } else {
-                        for (int i=0; i<BitSet.SINGLE_BYTE_SIZE; i++) {
-                            if (EncodingHelper.isWord(i)) {
-                                opt.map.addChar(i);
-                            }
-                        }
-                    }
-                    break;
-                } // inner switch
-            } else {
-                min = 1;
-            }
-            opt.length.set(min, max);
-            break;
-        }
-
         case NodeType.CANY: {
             opt.length.set(1, 1);
             break;
@@ -2008,20 +1231,6 @@ final class Analyser extends Parser {
             break;
         }
 
-        case NodeType.CALL: {
-            if (Config.USE_SUBEXP_CALL) {
-                CallNode cn = (CallNode)node;
-                if (cn.isRecursion()) {
-                    opt.length.set(0, MinMaxLen.INFINITE_DISTANCE);
-                } else {
-                    int safe = oenv.options;
-                    oenv.options = ((EncloseNode)cn.target).option;
-                    optimizeNodeLeft(cn.target, opt, oenv);
-                    oenv.options = safe;
-                }
-            } // USE_SUBEXP_CALL
-            break;
-        }
 
         case NodeType.QTFR: {
             NodeOptInfo nopt = new NodeOptInfo();
@@ -2081,7 +1290,7 @@ final class Analyser extends Parser {
                 break;
 
             case EncloseType.MEMORY:
-                if (Config.USE_SUBEXP_CALL && ++en.optCount > MAX_NODE_OPT_INFO_REF_COUNT) {
+                if (++en.optCount > MAX_NODE_OPT_INFO_REF_COUNT) {
                     int min = 0;
                     int max = MinMaxLen.INFINITE_DISTANCE;
                     if (en.isMinFixed()) min = en.minLength;
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ArrayCompiler.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ArrayCompiler.java
index b5599169..f348a205 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ArrayCompiler.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ArrayCompiler.java
@@ -28,8 +28,6 @@ import static jdk.nashorn.internal.runtime.regexp.joni.ast.QuantifierNode.isRepe
 import jdk.nashorn.internal.runtime.regexp.joni.ast.AnchorNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.BackRefNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.CClassNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CTypeNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CallNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.ConsAltNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.EncloseNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.Node;
@@ -71,11 +69,6 @@ final class ArrayCompiler extends Compiler {
         regex.templates = templates;
         regex.templateNum = templateNum;
         regex.factory = MatcherFactory.DEFAULT;
-
-        if (Config.USE_SUBEXP_CALL && analyser.env.unsetAddrList != null) {
-            analyser.env.unsetAddrList.fix(regex);
-            analyser.env.unsetAddrList = null;
-        }
     }
 
     @Override
@@ -119,7 +112,7 @@ final class ArrayCompiler extends Compiler {
         return isNeedStrLenOpExact(op);
     }
 
-    private int selectStrOpcode(int mbLength, int strLength, boolean ignoreCase) {
+    private int selectStrOpcode(int strLength, boolean ignoreCase) {
         int op;
 
         if (ignoreCase) {
@@ -128,31 +121,14 @@ final class ArrayCompiler extends Compiler {
             default:op = OPCode.EXACTN_IC; break;
             } // switch
         } else {
-            switch (mbLength) {
-            case 1:
-                switch (strLength) {
-                case 1: op = OPCode.EXACT1; break;
-                case 2: op = OPCode.EXACT2; break;
-                case 3: op = OPCode.EXACT3; break;
-                case 4: op = OPCode.EXACT4; break;
-                case 5: op = OPCode.EXACT5; break;
-                default:op = OPCode.EXACTN; break;
-                } // inner switch
-                break;
-            case 2:
-                switch (strLength) {
-                case 1: op = OPCode.EXACTMB2N1; break;
-                case 2: op = OPCode.EXACTMB2N2; break;
-                case 3: op = OPCode.EXACTMB2N3; break;
-                default:op = OPCode.EXACTMB2N;  break;
-                } // inner switch
-                break;
-            case 3:
-                op = OPCode.EXACTMB3N;
-                break;
-            default:
-                op = OPCode.EXACTMBN;
-            } // switch
+            switch (strLength) {
+            case 1: op = OPCode.EXACT1; break;
+            case 2: op = OPCode.EXACT2; break;
+            case 3: op = OPCode.EXACT3; break;
+            case 4: op = OPCode.EXACT4; break;
+            case 5: op = OPCode.EXACT5; break;
+            default:op = OPCode.EXACTN; break;
+            } // inner switch
         }
         return op;
     }
@@ -185,8 +161,8 @@ final class ArrayCompiler extends Compiler {
         }
     }
 
-    private int addCompileStringlength(char[] chars, int p, int mbLength, int strLength, boolean ignoreCase) {
-        int op = selectStrOpcode(mbLength, strLength, ignoreCase);
+    private int addCompileStringlength(char[] chars, int p, int strLength, boolean ignoreCase) {
+        int op = selectStrOpcode(strLength, ignoreCase);
         int len = OPSize.OPCODE;
 
         if (Config.USE_STRING_TEMPLATES && opTemplated(op)) {
@@ -194,25 +170,21 @@ final class ArrayCompiler extends Compiler {
             len += OPSize.LENGTH + OPSize.INDEX + OPSize.INDEX;
         } else {
             if (isNeedStrLenOpExact(op)) len += OPSize.LENGTH;
-            len += mbLength * strLength;
+            len += strLength;
         }
         if (op == OPCode.EXACTMBN) len += OPSize.LENGTH;
         return len;
     }
 
     @Override
-    protected final void addCompileString(char[] chars, int p, int mbLength, int strLength, boolean ignoreCase) {
-        int op = selectStrOpcode(mbLength, strLength, ignoreCase);
+    protected final void addCompileString(char[] chars, int p, int strLength, boolean ignoreCase) {
+        int op = selectStrOpcode(strLength, ignoreCase);
         addOpcode(op);
 
-        if (op == OPCode.EXACTMBN) addLength(mbLength);
+        if (op == OPCode.EXACTMBN) addLength(1);
 
         if (isNeedStrLenOpExact(op)) {
-            if (op == OPCode.EXACTN_IC || op == OPCode.EXACTN_IC_SB) {
-                addLength(mbLength * strLength);
-            } else {
-                addLength(strLength);
-            }
+            addLength(strLength);
         }
 
         if (Config.USE_STRING_TEMPLATES && opTemplated(op)) {
@@ -220,7 +192,7 @@ final class ArrayCompiler extends Compiler {
             addInt(p);
             addTemplate(chars);
         } else {
-            addChars(chars, p, mbLength * strLength);
+            addChars(chars, p, strLength);
         }
     }
 
@@ -242,14 +214,14 @@ final class ArrayCompiler extends Compiler {
             slen++;
             p++;
         }
-        int r = addCompileStringlength(chars, prev, 1, slen, ambig);
+        int r = addCompileStringlength(chars, prev, slen, ambig);
         rlen += r;
         return rlen;
     }
 
     private int compileLengthStringRawNode(StringNode sn) {
         if (sn.length() <= 0) return 0;
-        return addCompileStringlength(sn.chars, sn.p, 1 /*sb*/, sn.length(), false);
+        return addCompileStringlength(sn.chars, sn.p, sn.length(), false);
     }
 
     private void addMultiByteCClass(CodeRangeBuffer mbuf) {
@@ -312,26 +284,6 @@ final class ArrayCompiler extends Compiler {
     }
 
     @Override
-    protected void compileCTypeNode(CTypeNode node) {
-        CTypeNode cn = node;
-        int op;
-        switch (cn.ctype) {
-        case CharacterType.WORD:
-            if (cn.not) {
-                op = OPCode.NOT_WORD;
-            } else {
-                op = OPCode.WORD;
-            }
-            break;
-
-        default:
-            newInternalException(ERR_PARSER_BUG);
-            return; // not reached
-        } // inner switch
-        addOpcode(op);
-    }
-
-    @Override
     protected void compileAnyCharNode() {
         if (isMultiline(regex.options)) {
             addOpcode(OPCode.ANYCHAR_ML);
@@ -341,30 +293,15 @@ final class ArrayCompiler extends Compiler {
     }
 
     @Override
-    protected void compileCallNode(CallNode node) {
-        addOpcode(OPCode.CALL);
-        node.unsetAddrList.add(codeLength, node.target);
-        addAbsAddr(0); /*dummy addr.*/
-    }
-
-    @Override
     protected void compileBackrefNode(BackRefNode node) {
         BackRefNode br = node;
-        if (Config.USE_BACKREF_WITH_LEVEL && br.isNestLevel()) {
-            addOpcode(OPCode.BACKREF_WITH_LEVEL);
-            addOption(regex.options & Option.IGNORECASE);
-            addLength(br.nestLevel);
-            // !goto add_bacref_mems;!
-            addLength(br.backNum);
-            for (int i=br.backNum-1; i>=0; i--) addMemNum(br.back[i]);
-            return;
-        } else { // USE_BACKREF_AT_LEVEL
-            if (br.backNum == 1) {
-                if (isIgnoreCase(regex.options)) {
-                    addOpcode(OPCode.BACKREFN_IC);
-                    addMemNum(br.back[0]);
-                } else {
-                    switch (br.back[0]) {
+        // USE_BACKREF_AT_LEVEL
+        if (br.backNum == 1) {
+            if (isIgnoreCase(regex.options)) {
+                addOpcode(OPCode.BACKREFN_IC);
+                addMemNum(br.back[0]);
+            } else {
+                switch (br.back[0]) {
                     case 1:
                         addOpcode(OPCode.BACKREF1);
                         break;
@@ -375,18 +312,17 @@ final class ArrayCompiler extends Compiler {
                         addOpcode(OPCode.BACKREFN);
                         addOpcode(br.back[0]);
                         break;
-                    } // switch
-                }
+                } // switch
+            }
+        } else {
+            if (isIgnoreCase(regex.options)) {
+                addOpcode(OPCode.BACKREF_MULTI_IC);
             } else {
-                if (isIgnoreCase(regex.options)) {
-                    addOpcode(OPCode.BACKREF_MULTI_IC);
-                } else {
-                    addOpcode(OPCode.BACKREF_MULTI);
-                }
-                // !add_bacref_mems:!
-                addLength(br.backNum);
-                for (int i=br.backNum-1; i>=0; i--) addMemNum(br.back[i]);
+                addOpcode(OPCode.BACKREF_MULTI);
             }
+            // !add_bacref_mems:!
+            addLength(br.backNum);
+            for (int i=br.backNum-1; i>=0; i--) addMemNum(br.back[i]);
         }
     }
 
@@ -419,7 +355,7 @@ final class ArrayCompiler extends Compiler {
 
         compileTreeEmptyCheck(qn.target, emptyInfo);
 
-        if ((Config.USE_SUBEXP_CALL && regex.numCall > 0) || qn.isInRepeat()) {
+        if (qn.isInRepeat()) {
             addOpcode(qn.greedy ? OPCode.REPEAT_INC_SG : OPCode.REPEAT_INC_NG_SG);
         } else {
             addOpcode(qn.greedy ? OPCode.REPEAT_INC : OPCode.REPEAT_INC_NG);
@@ -434,193 +370,6 @@ final class ArrayCompiler extends Compiler {
         return ckn > 0;
     }
 
-    private int compileCECLengthQuantifierNode(QuantifierNode qn) {
-        boolean infinite = isRepeatInfinite(qn.upper);
-        int emptyInfo = qn.targetEmptyInfo;
-
-        int tlen = compileLengthTree(qn.target);
-        int ckn = regex.numCombExpCheck > 0 ? qn.combExpCheckNum : 0;
-        int cklen = cknOn(ckn) ? OPSize.STATE_CHECK_NUM : 0;
-
-        /* anychar repeat */
-        if (qn.target.getType() == NodeType.CANY) {
-            if (qn.greedy && infinite) {
-                if (qn.nextHeadExact != null && !cknOn(ckn)) {
-                    return OPSize.ANYCHAR_STAR_PEEK_NEXT + tlen * qn.lower + cklen;
-                } else {
-                    return OPSize.ANYCHAR_STAR + tlen * qn.lower + cklen;
-                }
-            }
-        }
-
-        int modTLen;
-        if (emptyInfo != 0) {
-            modTLen = tlen + (OPSize.NULL_CHECK_START + OPSize.NULL_CHECK_END);
-        } else {
-            modTLen = tlen;
-        }
-
-        int len;
-        if (infinite && qn.lower <= 1) {
-            if (qn.greedy) {
-                if (qn.lower == 1) {
-                    len = OPSize.JUMP;
-                } else {
-                    len = 0;
-                }
-                len += OPSize.PUSH + cklen + modTLen + OPSize.JUMP;
-            } else {
-                if (qn.lower == 0) {
-                    len = OPSize.JUMP;
-                } else {
-                    len = 0;
-                }
-                len += modTLen + OPSize.PUSH + cklen;
-            }
-        } else if (qn.upper == 0) {
-            if (qn.isRefered) { /* /(?<n>..){0}/ */
-                len = OPSize.JUMP + tlen;
-            } else {
-                len = 0;
-            }
-        } else if (qn.upper == 1 && qn.greedy) {
-            if (qn.lower == 0) {
-                if (cknOn(ckn)) {
-                    len = OPSize.STATE_CHECK_PUSH + tlen;
-                } else {
-                    len = OPSize.PUSH + tlen;
-                }
-            } else {
-                len = tlen;
-            }
-        } else if (!qn.greedy && qn.upper == 1 && qn.lower == 0) { /* '??' */
-            len = OPSize.PUSH + cklen + OPSize.JUMP + tlen;
-        } else {
-            len = OPSize.REPEAT_INC + modTLen + OPSize.OPCODE + OPSize.RELADDR + OPSize.MEMNUM;
-
-            if (cknOn(ckn)) {
-                len += OPSize.STATE_CHECK;
-            }
-        }
-        return len;
-    }
-
-    @Override
-    protected void compileCECQuantifierNode(QuantifierNode qn) {
-        boolean infinite = isRepeatInfinite(qn.upper);
-        int emptyInfo = qn.targetEmptyInfo;
-
-        int tlen = compileLengthTree(qn.target);
-
-        int ckn = regex.numCombExpCheck > 0 ? qn.combExpCheckNum : 0;
-
-        if (qn.isAnyCharStar()) {
-            compileTreeNTimes(qn.target, qn.lower);
-            if (qn.nextHeadExact != null && !cknOn(ckn)) {
-                if (isMultiline(regex.options)) {
-                    addOpcode(OPCode.ANYCHAR_ML_STAR_PEEK_NEXT);
-                } else {
-                    addOpcode(OPCode.ANYCHAR_STAR_PEEK_NEXT);
-                }
-                if (cknOn(ckn)) {
-                    addStateCheckNum(ckn);
-                }
-                StringNode sn = (StringNode)qn.nextHeadExact;
-                addChars(sn.chars, sn.p, 1);
-                return;
-            } else {
-                if (isMultiline(regex.options)) {
-                    if (cknOn(ckn)) {
-                        addOpcode(OPCode.STATE_CHECK_ANYCHAR_ML_STAR);
-                    } else {
-                        addOpcode(OPCode.ANYCHAR_ML_STAR);
-                    }
-                } else {
-                    if (cknOn(ckn)) {
-                        addOpcode(OPCode.STATE_CHECK_ANYCHAR_STAR);
-                    } else {
-                        addOpcode(OPCode.ANYCHAR_STAR);
-                    }
-                }
-                if (cknOn(ckn)) {
-                    addStateCheckNum(ckn);
-                }
-                return;
-            }
-        }
-
-        int modTLen;
-        if (emptyInfo != 0) {
-            modTLen = tlen + (OPSize.NULL_CHECK_START + OPSize.NULL_CHECK_END);
-        } else {
-            modTLen = tlen;
-        }
-        if (infinite && qn.lower <= 1) {
-            if (qn.greedy) {
-                if (qn.lower == 1) {
-                    addOpcodeRelAddr(OPCode.JUMP, cknOn(ckn) ? OPSize.STATE_CHECK_PUSH :
-                                                                     OPSize.PUSH);
-                }
-                if (cknOn(ckn)) {
-                    addOpcode(OPCode.STATE_CHECK_PUSH);
-                    addStateCheckNum(ckn);
-                    addRelAddr(modTLen + OPSize.JUMP);
-                } else {
-                    addOpcodeRelAddr(OPCode.PUSH, modTLen + OPSize.JUMP);
-                }
-                compileTreeEmptyCheck(qn.target, emptyInfo);
-                addOpcodeRelAddr(OPCode.JUMP, -(modTLen + OPSize.JUMP + (cknOn(ckn) ?
-                                                                               OPSize.STATE_CHECK_PUSH :
-                                                                               OPSize.PUSH)));
-            } else {
-                if (qn.lower == 0) {
-                    addOpcodeRelAddr(OPCode.JUMP, modTLen);
-                }
-                compileTreeEmptyCheck(qn.target, emptyInfo);
-                if (cknOn(ckn)) {
-                    addOpcode(OPCode.STATE_CHECK_PUSH_OR_JUMP);
-                    addStateCheckNum(ckn);
-                    addRelAddr(-(modTLen + OPSize.STATE_CHECK_PUSH_OR_JUMP));
-                } else {
-                    addOpcodeRelAddr(OPCode.PUSH, -(modTLen + OPSize.PUSH));
-                }
-            }
-        } else if (qn.upper == 0) {
-            if (qn.isRefered) { /* /(?<n>..){0}/ */
-                addOpcodeRelAddr(OPCode.JUMP, tlen);
-                compileTree(qn.target);
-            } // else r=0 ???
-        } else if (qn.upper == 1 && qn.greedy) {
-            if (qn.lower == 0) {
-                if (cknOn(ckn)) {
-                    addOpcode(OPCode.STATE_CHECK_PUSH);
-                    addStateCheckNum(ckn);
-                    addRelAddr(tlen);
-                } else {
-                    addOpcodeRelAddr(OPCode.PUSH, tlen);
-                }
-            }
-            compileTree(qn.target);
-        } else if (!qn.greedy && qn.upper == 1 && qn.lower == 0){ /* '??' */
-            if (cknOn(ckn)) {
-                addOpcode(OPCode.STATE_CHECK_PUSH);
-                addStateCheckNum(ckn);
-                addRelAddr(OPSize.JUMP);
-            } else {
-                addOpcodeRelAddr(OPCode.PUSH, OPSize.JUMP);
-            }
-
-            addOpcodeRelAddr(OPCode.JUMP, tlen);
-            compileTree(qn.target);
-        } else {
-            compileRangeRepeatNode(qn, modTLen, emptyInfo);
-            if (cknOn(ckn)) {
-                addOpcode(OPCode.STATE_CHECK);
-                addStateCheckNum(ckn);
-            }
-        }
-    }
-
     private int compileNonCECLengthQuantifierNode(QuantifierNode qn) {
         boolean infinite = isRepeatInfinite(qn.upper);
         int emptyInfo = qn.targetEmptyInfo;
@@ -821,21 +570,12 @@ final class ArrayCompiler extends Compiler {
         int len;
         switch (node.type) {
         case EncloseType.MEMORY:
-            if (Config.USE_SUBEXP_CALL && node.isCalled()) {
-                len = OPSize.MEMORY_START_PUSH + tlen + OPSize.CALL + OPSize.JUMP + OPSize.RETURN;
-                if (bsAt(regex.btMemEnd, node.regNum)) {
-                    len += node.isRecursion() ? OPSize.MEMORY_END_PUSH_REC : OPSize.MEMORY_END_PUSH;
-                } else {
-                    len += node.isRecursion() ? OPSize.MEMORY_END_REC : OPSize.MEMORY_END;
-                }
-            } else { // USE_SUBEXP_CALL
-                if (bsAt(regex.btMemStart, node.regNum)) {
-                    len = OPSize.MEMORY_START_PUSH;
-                } else {
-                    len = OPSize.MEMORY_START;
-                }
-                len += tlen + (bsAt(regex.btMemEnd, node.regNum) ? OPSize.MEMORY_END_PUSH : OPSize.MEMORY_END);
+            if (bsAt(regex.btMemStart, node.regNum)) {
+                len = OPSize.MEMORY_START_PUSH;
+            } else {
+                len = OPSize.MEMORY_START;
             }
+            len += tlen + (bsAt(regex.btMemEnd, node.regNum) ? OPSize.MEMORY_END_PUSH : OPSize.MEMORY_END);
             break;
 
         case EncloseType.STOP_BACKTRACK:
@@ -860,23 +600,6 @@ final class ArrayCompiler extends Compiler {
         int len;
         switch (node.type) {
         case EncloseType.MEMORY:
-            if (Config.USE_SUBEXP_CALL) {
-                if (node.isCalled()) {
-                    addOpcode(OPCode.CALL);
-                    node.callAddr = codeLength + OPSize.ABSADDR + OPSize.JUMP;
-                    node.setAddrFixed();
-                    addAbsAddr(node.callAddr);
-                    len = compileLengthTree(node.target);
-                    len += OPSize.MEMORY_START_PUSH + OPSize.RETURN;
-                    if (bsAt(regex.btMemEnd, node.regNum)) {
-                        len += node.isRecursion() ? OPSize.MEMORY_END_PUSH_REC : OPSize.MEMORY_END_PUSH;
-                    } else {
-                        len += node.isRecursion() ? OPSize.MEMORY_END_REC : OPSize.MEMORY_END;
-                    }
-                    addOpcodeRelAddr(OPCode.JUMP, len);
-                }
-            } // USE_SUBEXP_CALL
-
             if (bsAt(regex.btMemStart, node.regNum)) {
                 addOpcode(OPCode.MEMORY_START_PUSH);
             } else {
@@ -886,22 +609,12 @@ final class ArrayCompiler extends Compiler {
             addMemNum(node.regNum);
             compileTree(node.target);
 
-            if (Config.USE_SUBEXP_CALL && node.isCalled()) {
-                if (bsAt(regex.btMemEnd, node.regNum)) {
-                    addOpcode(node.isRecursion() ? OPCode.MEMORY_END_PUSH_REC : OPCode.MEMORY_END_PUSH);
-                } else {
-                    addOpcode(node.isRecursion() ? OPCode.MEMORY_END_REC : OPCode.MEMORY_END);
-                }
-                addMemNum(node.regNum);
-                addOpcode(OPCode.RETURN);
-            } else { // USE_SUBEXP_CALL
-                if (bsAt(regex.btMemEnd, node.regNum)) {
-                    addOpcode(OPCode.MEMORY_END_PUSH);
-                } else {
-                    addOpcode(OPCode.MEMORY_END);
-                }
-                addMemNum(node.regNum);
+            if (bsAt(regex.btMemEnd, node.regNum)) {
+                addOpcode(OPCode.MEMORY_END_PUSH);
+            } else {
+                addOpcode(OPCode.MEMORY_END);
             }
+            addMemNum(node.regNum);
             break;
 
         case EncloseType.STOP_BACKTRACK:
@@ -1078,32 +791,17 @@ final class ArrayCompiler extends Compiler {
         case NodeType.BREF:
             BackRefNode br = (BackRefNode)node;
 
-            if (Config.USE_BACKREF_WITH_LEVEL && br.isNestLevel()) {
-                len = OPSize.OPCODE + OPSize.OPTION + OPSize.LENGTH +
-                      OPSize.LENGTH + (OPSize.MEMNUM * br.backNum);
-            } else { // USE_BACKREF_AT_LEVEL
-                if (br.backNum == 1) {
-                    len = ((!isIgnoreCase(regex.options) && br.back[0] <= 2)
-                            ? OPSize.OPCODE : (OPSize.OPCODE + OPSize.MEMNUM));
-                } else {
-                    len = OPSize.OPCODE + OPSize.LENGTH + (OPSize.MEMNUM * br.backNum);
-                }
+            // USE_BACKREF_AT_LEVEL
+            if (br.backNum == 1) {
+                len = ((!isIgnoreCase(regex.options) && br.back[0] <= 2)
+                        ? OPSize.OPCODE : (OPSize.OPCODE + OPSize.MEMNUM));
+            } else {
+                len = OPSize.OPCODE + OPSize.LENGTH + (OPSize.MEMNUM * br.backNum);
             }
             break;
 
-        case NodeType.CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                len = OPSize.CALL;
-                break;
-            } // USE_SUBEXP_CALL
-            break;
-
         case NodeType.QTFR:
-            if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-                len = compileCECLengthQuantifierNode((QuantifierNode)node);
-            } else {
-                len = compileNonCECLengthQuantifierNode((QuantifierNode)node);
-            }
+            len = compileNonCECLengthQuantifierNode((QuantifierNode)node);
             break;
 
         case NodeType.ENCLOSE:
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/AsmCompiler.java b/src/jdk/nashorn/internal/runtime/regexp/joni/AsmCompiler.java
deleted file mode 100644
index 475d6595..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/AsmCompiler.java
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-import jdk.nashorn.internal.runtime.regexp.joni.ast.AnchorNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.BackRefNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CClassNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CTypeNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CallNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.ConsAltNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.EncloseNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.QuantifierNode;
-
-final class AsmCompiler extends AsmCompilerSupport {
-
-    public AsmCompiler(Analyser analyser) {
-        super(analyser);
-    }
-
-    @Override
-    protected void prepare() {
-        REG_NUM++;
-        prepareMachine();
-        prepareMachineInit();
-        prepareMachineMatch();
-
-        prepareFactory();
-        prepareFactoryInit();
-    }
-
-    @Override
-    protected void finish() {
-        setupFactoryInit();
-
-        setupMachineInit();
-        setupMachineMatch();
-
-        setupClasses();
-    }
-
-    @Override
-    protected void compileAltNode(ConsAltNode node) {
-    }
-
-    @Override
-    protected void addCompileString(char[] chars, int p, int mbLength, int strLength, boolean ignoreCase) {
-        String template = installTemplate(chars, p, strLength);
-    }
-
-    @Override
-    protected void compileCClassNode(CClassNode node) {
-        if (node.bs != null) {
-            String bitsetName = installBitSet(node.bs.bits);
-        }
-    }
-
-    @Override
-    protected void compileCTypeNode(CTypeNode node) {
-    }
-
-    @Override
-    protected void compileAnyCharNode() {
-    }
-
-    @Override
-    protected void compileBackrefNode(BackRefNode node) {
-    }
-
-    @Override
-    protected void compileCallNode(CallNode node) {
-    }
-
-    @Override
-    protected void compileCECQuantifierNode(QuantifierNode node) {
-    }
-
-    @Override
-    protected void compileNonCECQuantifierNode(QuantifierNode node) {
-    }
-
-    @Override
-    protected void compileOptionNode(EncloseNode node) {
-    }
-
-    @Override
-    protected void compileEncloseNode(EncloseNode node) {
-    }
-
-    @Override
-    protected void compileAnchorNode(AnchorNode node) {
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/AsmCompilerSupport.java b/src/jdk/nashorn/internal/runtime/regexp/joni/AsmCompilerSupport.java
deleted file mode 100644
index 06ca21a9..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/AsmCompilerSupport.java
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-import java.io.FileOutputStream;
-import java.io.IOException;
-
-import jdk.nashorn.internal.runtime.regexp.joni.constants.AsmConstants;
-import jdk.internal.org.objectweb.asm.ClassWriter;
-import jdk.internal.org.objectweb.asm.MethodVisitor;
-import jdk.internal.org.objectweb.asm.Opcodes;
-
-abstract class AsmCompilerSupport extends Compiler implements Opcodes, AsmConstants {
-    protected ClassWriter factory;      // matcher allocator, also bit set, code rage and string template container
-    protected MethodVisitor factoryInit;// factory constructor
-    protected String factoryName;
-
-    protected ClassWriter machine;      // matcher
-    protected MethodVisitor machineInit;// matcher constructor
-    protected MethodVisitor match;      // actual matcher implementation (the matchAt method)
-    protected String machineName;
-
-    // we will? try to manage visitMaxs ourselves for efficiency
-    protected int maxStack = 1;
-    protected int maxVars = LAST_INDEX;
-
-    // for field generation
-    protected int bitsets, ranges, templates;
-
-    // simple class name postfix scheme for now
-    static int REG_NUM = 0;
-
-    // dummy class loader for now
-    private static final class DummyClassLoader extends ClassLoader {
-        public Class<?> defineClass(String name, byte[] bytes) {
-            return super.defineClass(name, bytes, 0, bytes.length);
-        }
-    };
-
-    private static final DummyClassLoader loader = new DummyClassLoader();
-
-    AsmCompilerSupport(Analyser analyser) {
-        super(analyser);
-    }
-
-    protected final void prepareFactory() {
-        factory = new ClassWriter(ClassWriter.COMPUTE_MAXS);
-        factoryName = "jdk/nashorn/internal/runtime/regexp/joni/MatcherFactory" + REG_NUM;
-
-        factory.visit(V1_4, ACC_PUBLIC + ACC_FINAL, factoryName, null, "jdk/nashorn/internal/runtime/regexp/joni/MatcherFactory", null);
-
-        MethodVisitor create = factory.visitMethod(ACC_SYNTHETIC, "create", "(Lorg/joni/Regex;[BII)Lorg/joni/Matcher;", null, null);
-        create.visitTypeInsn(NEW, machineName);
-        create.visitInsn(DUP);          // instance
-        create.visitVarInsn(ALOAD, 1);  // Regex
-        create.visitVarInsn(ALOAD, 2);  // bytes[]
-        create.visitVarInsn(ILOAD, 3);  // p
-        create.visitVarInsn(ILOAD, 4);  // end
-        create.visitMethodInsn(INVOKESPECIAL, machineName, "<init>", "(Lorg/joni/Regex;[BII)V");
-        create.visitInsn(ARETURN);
-        create.visitMaxs(0, 0);
-        //create.visitMaxs(6, 5);
-        create.visitEnd();
-    }
-
-    protected final void prepareFactoryInit() {
-        factoryInit = factory.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
-        factoryInit.visitVarInsn(ALOAD, 0);
-        factoryInit.visitMethodInsn(INVOKESPECIAL, "jdk/nashorn/internal/runtime/regexp/joni/MatcherFactory", "<init>", "()V");
-    }
-
-    protected final void setupFactoryInit() {
-        factoryInit.visitInsn(RETURN);
-        factoryInit.visitMaxs(0, 0);
-        //init.visitMaxs(1, 1);
-        factoryInit.visitEnd();
-    }
-
-    protected final void prepareMachine() {
-        machine = new ClassWriter(ClassWriter.COMPUTE_MAXS);
-        machineName = "jdk/nashorn/internal/runtime/regexp/joni/NativeMachine" + REG_NUM;
-    }
-
-    protected final void prepareMachineInit() {
-        machine.visit(V1_4, ACC_PUBLIC + ACC_FINAL, machineName, null, "jdk/nashorn/internal/runtime/regexp/joni/NativeMachine", null);
-        machineInit = machine.visitMethod(ACC_PROTECTED, "<init>", "(Lorg/joni/Regex;[BII)V", null, null);
-        machineInit.visitVarInsn(ALOAD, THIS);  // this
-        machineInit.visitVarInsn(ALOAD, 1);     // Regex
-        machineInit.visitVarInsn(ALOAD, 2);     // bytes[]
-        machineInit.visitVarInsn(ILOAD, 3);     // p
-        machineInit.visitVarInsn(ILOAD, 4);     // end
-        machineInit.visitMethodInsn(INVOKESPECIAL, "jdk/nashorn/internal/runtime/regexp/joni/NativeMachine", "<init>", "(Lorg/joni/Regex;[BII)V");
-    }
-
-    protected final void setupMachineInit() {
-        if (bitsets + ranges + templates > 0) { // ok, some of these are in use, we'd like to cache the factory
-            machine.visitField(ACC_PRIVATE + ACC_FINAL, "factory", "L" + factoryName + ";", null, null);
-            machineInit.visitVarInsn(ALOAD, THIS);  // this
-            machineInit.visitVarInsn(ALOAD, 1);     // this, Regex
-            machineInit.visitFieldInsn(GETFIELD, "jdk/nashorn/internal/runtime/regexp/joni/Regex", "factory", "Lorg/joni/MatcherFactory;"); // this, factory
-            machineInit.visitTypeInsn(CHECKCAST, factoryName);
-            machineInit.visitFieldInsn(PUTFIELD, machineName, "factory", "L" + factoryName + ";"); // []
-        }
-
-        machineInit.visitInsn(RETURN);
-        machineInit.visitMaxs(0, 0);
-        //init.visitMaxs(5, 5);
-        machineInit.visitEnd();
-    }
-
-    protected final void prepareMachineMatch() {
-        match = machine.visitMethod(ACC_SYNTHETIC, "matchAt", "(III)I", null, null);
-        move(S, SSTART);        // s = sstart
-        load("bytes", "[B");    //
-        astore(BYTES);          // byte[]bytes = this.bytes
-    }
-
-    protected final void setupMachineMatch() {
-        match.visitInsn(ICONST_M1);
-        match.visitInsn(IRETURN);
-
-        match.visitMaxs(maxStack, maxVars);
-        match.visitEnd();
-    }
-
-    protected final void setupClasses() {
-        byte[]factoryCode = factory.toByteArray();
-        byte[]machineCode = machine.toByteArray();
-
-        if (Config.DEBUG_ASM) {
-            try {
-                FileOutputStream fos;
-                fos = new FileOutputStream(factoryName.substring(factoryName.lastIndexOf('/') + 1) + ".class");
-                fos.write(factoryCode);
-                fos.close();
-                fos = new FileOutputStream(machineName.substring(machineName.lastIndexOf('/') + 1) + ".class");
-                fos.write(machineCode);
-                fos.close();
-            } catch (IOException ioe) {
-                ioe.printStackTrace(Config.err);
-            }
-        }
-
-        loader.defineClass(machineName.replace('/', '.'), machineCode);
-        Class<?> cls = loader.defineClass(factoryName.replace('/', '.'), factoryCode);
-        try {
-            regex.factory = (MatcherFactory)cls.newInstance();
-        } catch(Exception e) {
-            e.printStackTrace(Config.err);
-        }
-    }
-
-    protected final void aload(int var) {
-        match.visitVarInsn(ALOAD, var);
-    }
-
-    protected final void astore(int var) {
-        match.visitVarInsn(ASTORE, var);
-    }
-
-    protected final void loadThis() {
-        match.visitVarInsn(ALOAD, THIS);
-    }
-
-    protected final void load(int var) {
-        match.visitVarInsn(ILOAD, var);
-    }
-
-    protected final void store(int var) {
-        match.visitVarInsn(ISTORE, var);
-    }
-
-    protected final void move(int to, int from) {
-        load(from);
-        store(to);
-    }
-
-    protected final void load(String field, String singature) {
-        loadThis();
-        match.visitFieldInsn(GETFIELD, machineName, field, singature);
-    }
-
-    protected final void load(String field) {
-        load(field, "I");
-    }
-
-    protected final void store(String field, String singature) {
-        loadThis();
-        match.visitFieldInsn(PUTFIELD, machineName, field, singature);
-    }
-
-    protected final void store(String field) {
-        store(field, "I");
-    }
-
-    protected final String installTemplate(char[] arr, int p, int length) {
-        String templateName = TEMPLATE + ++templates;
-        installArray(templateName, arr, p, length);
-        return templateName;
-    }
-
-    protected final String installCodeRange(int[]arr) {
-        String coreRangeName = CODERANGE + ++ranges;
-        installArray(coreRangeName, arr);
-        return coreRangeName;
-    }
-
-    protected final String installBitSet(int[]arr) {
-        String bitsetName = BITSET + ++bitsets;
-        installArray(bitsetName, arr);
-        return bitsetName;
-    }
-
-    private void installArray(String name, int[]arr) {
-        factory.visitField(ACC_PRIVATE + ACC_FINAL, name, "[I", null, null);
-        factoryInit.visitVarInsn(ALOAD, THIS);          // this;
-        loadInt(factoryInit, arr.length);               // this, length
-        factoryInit.visitIntInsn(NEWARRAY, T_INT);      // this, arr
-        for (int i=0;i < arr.length; i++) buildArray(i, arr[i], IASTORE);
-        factoryInit.visitFieldInsn(PUTFIELD, factoryName, name, "[I");
-    }
-
-    private void installArray(String name, char[]arr, int p, int length) {
-        factory.visitField(ACC_PRIVATE + ACC_FINAL, name, "[B", null, null);
-        factoryInit.visitVarInsn(ALOAD, THIS);          // this;
-        loadInt(factoryInit, arr.length);               // this, length
-        factoryInit.visitIntInsn(NEWARRAY, T_BYTE);     // this, arr
-        for (int i=p, j=0; i < p + length; i++, j++) buildArray(j, arr[i] & 0xff, BASTORE);
-        factoryInit.visitFieldInsn(PUTFIELD, factoryName, name, "[B");
-    }
-
-    private void buildArray(int index, int value, int type) {
-        factoryInit.visitInsn(DUP);     // ... arr, arr
-        loadInt(factoryInit, index);    // ... arr, arr, index
-        loadInt(factoryInit, value);    // ... arr, arr, index, value
-        factoryInit.visitInsn(type);    // ... arr
-    }
-
-    private void loadInt(MethodVisitor mv, int value) {
-        if (value >= -1 && value <= 5) {
-            mv.visitInsn(value + ICONST_0); // ICONST_0 == 3
-        } else if (value >= 6 && value <= 127 || value >= -128 && value <= -2) {
-            mv.visitIntInsn(BIPUSH, value);
-        } else if (value >= 128 && value <= 32767 || value >= -32768 && value <= -129) {
-            mv.visitIntInsn(SIPUSH, value);
-        } else {
-            mv.visitLdcInsn(new Integer(value));
-        }
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/BitSet.java b/src/jdk/nashorn/internal/runtime/regexp/joni/BitSet.java
index bf715987..5f98fe64 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/BitSet.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/BitSet.java
@@ -51,10 +51,6 @@ public final class BitSet {
         bits[pos >>> ROOM_SHIFT] &= ~bit(pos);
     }
 
-    public void invert(int pos) {
-        bits[pos >>> ROOM_SHIFT] ^= bit(pos);
-    }
-
     public void clear() {
         for (int i=0; i<BITSET_SIZE; i++) bits[i]=0;
     }
@@ -70,10 +66,6 @@ public final class BitSet {
         for (int i=from; i<=to && i < SINGLE_BYTE_SIZE; i++) set(i);
     }
 
-    public void setAll() {
-        for (int i=0; i<BITSET_SIZE; i++) bits[i] = ~0;
-    }
-
     public void invert() {
         for (int i=0; i<BITSET_SIZE; i++) bits[i] = ~bits[i];
     }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/BitStatus.java b/src/jdk/nashorn/internal/runtime/regexp/joni/BitStatus.java
index 758a4e57..30528598 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/BitStatus.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/BitStatus.java
@@ -25,12 +25,15 @@ final class BitStatus {
     public static int bsClear() {
         return 0;
     }
+
     public static int bsAll() {
         return -1;
     }
+
     public static boolean bsAt(int stats, int n) {
         return (n < BIT_STATUS_BITS_NUM ? stats & (1 << n) : (stats & 1)) != 0;
     }
+
     public static int bsOnAt(int stats, int n) {
         if (n < BIT_STATUS_BITS_NUM) {
             stats |= (1 << n);
@@ -39,10 +42,6 @@ final class BitStatus {
         }
         return stats;
     }
-    public static int bsOnAtSimple(int stats, int n) {
-        if (n < BIT_STATUS_BITS_NUM) stats |= (1 << n);
-        return stats;
-    }
 
     public static int bsOnOff(int v, int f, boolean negative) {
         if (negative) {
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodeMachine.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodeMachine.java
index 43cc5188..855e1ced 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodeMachine.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodeMachine.java
@@ -53,56 +53,6 @@ class ByteCodeMachine extends StackMachine {
         this.code = regex.code;
     }
 
-    protected int stkp; // a temporary
-    private boolean makeCaptureHistoryTree(CaptureTreeNode node) {
-        //CaptureTreeNode child;
-        int k = stkp;
-        //int k = kp;
-
-        while (k < stk) {
-            StackEntry e = stack[k];
-            if (e.type == MEM_START) {
-                int n = e.getMemNum();
-                if (n <= Config.MAX_CAPTURE_HISTORY_GROUP && bsAt(regex.captureHistory, n)) {
-                    CaptureTreeNode child = new CaptureTreeNode();
-                    child.group = n;
-                    child.beg = e.getMemPStr() - str;
-                    node.addChild(child);
-                    stkp = k + 1;
-                    if (makeCaptureHistoryTree(child)) return true;
-
-                    k = stkp;
-                    child.end = e.getMemPStr() - str;
-                }
-            } else if (e.type == MEM_END) {
-                if (e.getMemNum() == node.group) {
-                    node.end = e.getMemPStr() - str;
-                    stkp = k;
-                    return false;
-                }
-            }
-        }
-        return true; /* 1: root node ending. */
-    }
-
-    private void checkCaptureHistory(Region region) {
-        CaptureTreeNode node;
-        if (region.historyRoot == null) {
-            node = region.historyRoot = new CaptureTreeNode();
-        } else {
-            node = region.historyRoot;
-            node.clear();
-        }
-
-        // was clear ???
-        node.group = 0;
-        node.beg = sstart - str;
-        node.end = s      - str;
-
-        stkp = 0;
-        makeCaptureHistoryTree(region.historyRoot);
-    }
-
     private boolean stringCmpIC(int caseFlodFlag, int s1, IntHolder ps2, int mbLen, int textEnd) {
 
         int s2 = ps2.value;
@@ -175,13 +125,6 @@ class ByteCodeMachine extends StackMachine {
                 case OPCode.EXACT5:                     opExact5();                continue;
                 case OPCode.EXACTN:                     opExactN();                continue;
 
-                case OPCode.EXACTMB2N1:                 opExactMB2N1();            break;
-                case OPCode.EXACTMB2N2:                 opExactMB2N2();            continue;
-                case OPCode.EXACTMB2N3:                 opExactMB2N3();            continue;
-                case OPCode.EXACTMB2N:                  opExactMB2N();             continue;
-                case OPCode.EXACTMB3N:                  opExactMB3N();             continue;
-                case OPCode.EXACTMBN:                   opExactMBN();              continue;
-
                 case OPCode.EXACT1_IC:                  opExact1IC();              break;
                 case OPCode.EXACTN_IC:                  opExactNIC();              continue;
 
@@ -199,8 +142,6 @@ class ByteCodeMachine extends StackMachine {
                 case OPCode.ANYCHAR_ML_STAR:            opAnyCharMLStar();         break;
                 case OPCode.ANYCHAR_STAR_PEEK_NEXT:     opAnyCharStarPeekNext();   break;
                 case OPCode.ANYCHAR_ML_STAR_PEEK_NEXT:  opAnyCharMLStarPeekNext(); break;
-                case OPCode.STATE_CHECK_ANYCHAR_STAR:   opStateCheckAnyCharStar(); break;
-                case OPCode.STATE_CHECK_ANYCHAR_ML_STAR:opStateCheckAnyCharMLStar();break;
 
                 case OPCode.WORD:                       opWord();                  break;
                 case OPCode.NOT_WORD:                   opNotWord();               break;
@@ -239,11 +180,6 @@ class ByteCodeMachine extends StackMachine {
                 case OPCode.JUMP:                       opJump();                  continue;
                 case OPCode.PUSH:                       opPush();                  continue;
 
-                // CEC
-                case OPCode.STATE_CHECK_PUSH:           opStateCheckPush();        continue;
-                case OPCode.STATE_CHECK_PUSH_OR_JUMP:   opStateCheckPushOrJump();  continue;
-                case OPCode.STATE_CHECK:                opStateCheck();            continue;
-
                 case OPCode.POP:                        opPop();                   continue;
                 case OPCode.PUSH_OR_JUMP_EXACT1:        opPushOrJumpExact1();      continue;
                 case OPCode.PUSH_IF_PEEK_NEXT:          opPushIfPeekNext();        continue;
@@ -266,10 +202,6 @@ class ByteCodeMachine extends StackMachine {
                 case OPCode.PUSH_LOOK_BEHIND_NOT:       opPushLookBehindNot();     continue;
                 case OPCode.FAIL_LOOK_BEHIND_NOT:       opFailLookBehindNot();     continue;
 
-                // USE_SUBEXP_CALL
-                case OPCode.CALL:                       opCall();                  continue;
-                case OPCode.RETURN:                     opReturn();                continue;
-
                 case OPCode.FINISH:
                     return finish();
 
@@ -322,9 +254,6 @@ class ByteCodeMachine extends StackMachine {
 
                 }
 
-                if (Config.USE_CAPTURE_HISTORY) {
-                    if (regex.captureHistory != 0) checkCaptureHistory(region);
-                }
             } else {
                 msaBegin = sstart - str;
                 msaEnd   = s      - str;
@@ -437,125 +366,6 @@ class ByteCodeMachine extends StackMachine {
         sprev = s - 1;
     }
 
-    private void opExactMB2N1() {
-        if (s + 2 > range) {opFail(); return;}
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        sprev = sbegin; // break;
-    }
-
-    private void opExactMB2N2() {
-        if (s + 4 > range) {opFail(); return;}
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        sprev = s;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-   }
-
-    private void opExactMB2N3() {
-        if (s + 6 > range) {opFail(); return;}
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        sprev = s;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-        if (code[ip] != chars[s]) {opFail(); return;}
-        ip++; s++;
-    }
-
-    private void opExactMB2N() {
-        int tlen = code[ip++];
-        if (s + tlen * 2 > range) {opFail(); return;}
-
-        if (Config.USE_STRING_TEMPLATES) {
-            char[] bs = regex.templates[code[ip++]];
-            int ps = code[ip++];
-
-            while(tlen-- > 0) {
-                if (bs[ps] != chars[s]) {opFail(); return;}
-                ps++; s++;
-                if (bs[ps] != chars[s]) {opFail(); return;}
-                ps++; s++;
-            }
-        } else {
-            while(tlen-- > 0) {
-                if (code[ip] != chars[s]) {opFail(); return;}
-                ip++; s++;
-                if (code[ip] != chars[s]) {opFail(); return;}
-                ip++; s++;
-            }
-        }
-        sprev = s - 2;
-    }
-
-    private void opExactMB3N() {
-        int tlen = code[ip++];
-        if (s + tlen * 3 > range) {opFail(); return;}
-
-        if (Config.USE_STRING_TEMPLATES) {
-            char[] bs = regex.templates[code[ip++]];
-            int ps = code[ip++];
-
-            while (tlen-- > 0) {
-                if (bs[ps] != chars[s]) {opFail(); return;}
-                ps++; s++;
-                if (bs[ps] != chars[s]) {opFail(); return;}
-                ps++; s++;
-                if (bs[ps] != chars[s]) {opFail(); return;}
-                ps++; s++;
-            }
-        } else {
-            while (tlen-- > 0) {
-                if (code[ip] != chars[s]) {opFail(); return;}
-                ip++; s++;
-                if (code[ip] != chars[s]) {opFail(); return;}
-                ip++; s++;
-                if (code[ip] != chars[s]) {opFail(); return;}
-                ip++; s++;
-            }
-        }
-
-        sprev = s - 3;
-    }
-
-    private void opExactMBN() {
-        int tlen = code[ip++];   /* mb-len */
-        int tlen2= code[ip++];   /* string len */
-
-        tlen2 *= tlen;
-        if (s + tlen2 > range) {opFail(); return;}
-
-        if (Config.USE_STRING_TEMPLATES) {
-            char[] bs = regex.templates[code[ip++]];
-            int ps = code[ip++];
-
-            while (tlen2-- > 0) {
-                if (bs[ps] != chars[s]) {opFail(); return;}
-                ps++; s++;
-            }
-        } else {
-            while (tlen2-- > 0) {
-                if (code[ip] != chars[s]) {opFail(); return;}
-                ip++; s++;
-            }
-        }
-
-        sprev = s - tlen;
-    }
-
     private void opExact1IC() {
         if (s >= range || code[ip] != Character.toLowerCase(chars[s++])) {opFail(); return;}
         ip++;
@@ -748,34 +558,6 @@ class ByteCodeMachine extends StackMachine {
         sprev = sbegin; // break;
     }
 
-    // CEC
-    private void opStateCheckAnyCharStar() {
-        int mem = code[ip++];
-        final char[] chars = this.chars;
-
-        while (s < range) {
-            if (stateCheckVal(s, mem)) {opFail(); return;}
-            pushAltWithStateCheck(ip, s, sprev, mem);
-            if (chars[s] == EncodingHelper.NEW_LINE) {opFail(); return;}
-            sprev = s;
-            s++;
-        }
-        sprev = sbegin; // break;
-    }
-
-    // CEC
-    private void opStateCheckAnyCharMLStar() {
-        int mem = code[ip++];
-
-        while (s < range) {
-            if (stateCheckVal(s, mem)) {opFail(); return;}
-            pushAltWithStateCheck(ip, s, sprev, mem);
-            sprev = s;
-            s++;
-        }
-        sprev = sbegin; // break;
-    }
-
     private void opWord() {
         if (s >= range || !EncodingHelper.isWord(chars[s])) {opFail(); return;}
         s++;
@@ -1223,33 +1005,6 @@ class ByteCodeMachine extends StackMachine {
         pushAlt(ip + addr, s, sprev);
     }
 
-    // CEC
-    private void opStateCheckPush() {
-        int mem = code[ip++];
-        if (stateCheckVal(s, mem)) {opFail(); return;}
-        int addr = code[ip++];
-        pushAltWithStateCheck(ip + addr, s, sprev, mem);
-    }
-
-    // CEC
-    private void opStateCheckPushOrJump() {
-        int mem = code[ip++];
-        int addr= code[ip++];
-
-        if (stateCheckVal(s, mem)) {
-            ip += addr;
-        } else {
-            pushAltWithStateCheck(ip + addr, s, sprev, mem);
-        }
-    }
-
-    // CEC
-    private void opStateCheck() {
-        int mem = code[ip++];
-        if (stateCheckVal(s, mem)) {opFail(); return;}
-        pushStateCheck(s, mem);
-    }
-
     private void opPop() {
         popOne();
     }
@@ -1425,17 +1180,6 @@ class ByteCodeMachine extends StackMachine {
         opFail();
     }
 
-    private void opCall() {
-        int addr = code[ip++];
-        pushCallFrame(ip);
-        ip = addr; // absolute address
-    }
-
-    private void opReturn() {
-        ip = sreturn();
-        pushReturn();
-    }
-
     private void opFail() {
         if (stack == null) {
             ip = regex.codeLength - 1;
@@ -1447,13 +1191,6 @@ class ByteCodeMachine extends StackMachine {
         ip    = e.getStatePCode();
         s     = e.getStatePStr();
         sprev = e.getStatePStrPrev();
-
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-            if (e.getStateCheck() != 0) {
-                e.type = STATE_CHECK_MARK;
-                stk++;
-            }
-        }
     }
 
     private int finish() {
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodePrinter.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodePrinter.java
index 86a558b0..d56164d1 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodePrinter.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ByteCodePrinter.java
@@ -34,6 +34,239 @@ class ByteCodePrinter {
     int operantCount;
     WarnCallback warnings;
 
+    private final static String OpCodeNames[] = new String[] {
+            "finish", /*OP_FINISH*/
+            "end", /*OP_END*/
+            "exact1", /*OP_EXACT1*/
+            "exact2", /*OP_EXACT2*/
+            "exact3", /*OP_EXACT3*/
+            "exact4", /*OP_EXACT4*/
+            "exact5", /*OP_EXACT5*/
+            "exactn", /*OP_EXACTN*/
+            "exactmb2-n1", /*OP_EXACTMB2N1*/
+            "exactmb2-n2", /*OP_EXACTMB2N2*/
+            "exactmb2-n3", /*OP_EXACTMB2N3*/
+            "exactmb2-n", /*OP_EXACTMB2N*/
+            "exactmb3n", /*OP_EXACTMB3N*/
+            "exactmbn", /*OP_EXACTMBN*/
+            "exact1-ic", /*OP_EXACT1_IC*/
+            "exactn-ic", /*OP_EXACTN_IC*/
+            "cclass", /*OP_CCLASS*/
+            "cclass-mb", /*OP_CCLASS_MB*/
+            "cclass-mix", /*OP_CCLASS_MIX*/
+            "cclass-not", /*OP_CCLASS_NOT*/
+            "cclass-mb-not", /*OP_CCLASS_MB_NOT*/
+            "cclass-mix-not", /*OP_CCLASS_MIX_NOT*/
+            "cclass-node", /*OP_CCLASS_NODE*/
+            "anychar", /*OP_ANYCHAR*/
+            "anychar-ml", /*OP_ANYCHAR_ML*/
+            "anychar*", /*OP_ANYCHAR_STAR*/
+            "anychar-ml*", /*OP_ANYCHAR_ML_STAR*/
+            "anychar*-peek-next", /*OP_ANYCHAR_STAR_PEEK_NEXT*/
+            "anychar-ml*-peek-next", /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
+            "word", /*OP_WORD*/
+            "not-word", /*OP_NOT_WORD*/
+            "word-bound", /*OP_WORD_BOUND*/
+            "not-word-bound", /*OP_NOT_WORD_BOUND*/
+            "word-begin", /*OP_WORD_BEGIN*/
+            "word-end", /*OP_WORD_END*/
+            "begin-buf", /*OP_BEGIN_BUF*/
+            "end-buf", /*OP_END_BUF*/
+            "begin-line", /*OP_BEGIN_LINE*/
+            "end-line", /*OP_END_LINE*/
+            "semi-end-buf", /*OP_SEMI_END_BUF*/
+            "begin-position", /*OP_BEGIN_POSITION*/
+            "backref1", /*OP_BACKREF1*/
+            "backref2", /*OP_BACKREF2*/
+            "backrefn", /*OP_BACKREFN*/
+            "backrefn-ic", /*OP_BACKREFN_IC*/
+            "backref_multi", /*OP_BACKREF_MULTI*/
+            "backref_multi-ic", /*OP_BACKREF_MULTI_IC*/
+            "backref_at_level", /*OP_BACKREF_AT_LEVEL*/
+            "mem-start", /*OP_MEMORY_START*/
+            "mem-start-push", /*OP_MEMORY_START_PUSH*/
+            "mem-end-push", /*OP_MEMORY_END_PUSH*/
+            "mem-end-push-rec", /*OP_MEMORY_END_PUSH_REC*/
+            "mem-end", /*OP_MEMORY_END*/
+            "mem-end-rec", /*OP_MEMORY_END_REC*/
+            "fail", /*OP_FAIL*/
+            "jump", /*OP_JUMP*/
+            "push", /*OP_PUSH*/
+            "pop", /*OP_POP*/
+            "push-or-jump-e1", /*OP_PUSH_OR_JUMP_EXACT1*/
+            "push-if-peek-next", /*OP_PUSH_IF_PEEK_NEXT*/
+            "repeat", /*OP_REPEAT*/
+            "repeat-ng", /*OP_REPEAT_NG*/
+            "repeat-inc", /*OP_REPEAT_INC*/
+            "repeat-inc-ng", /*OP_REPEAT_INC_NG*/
+            "repeat-inc-sg", /*OP_REPEAT_INC_SG*/
+            "repeat-inc-ng-sg", /*OP_REPEAT_INC_NG_SG*/
+            "null-check-start", /*OP_NULL_CHECK_START*/
+            "null-check-end", /*OP_NULL_CHECK_END*/
+            "null-check-end-memst", /*OP_NULL_CHECK_END_MEMST*/
+            "null-check-end-memst-push", /*OP_NULL_CHECK_END_MEMST_PUSH*/
+            "push-pos", /*OP_PUSH_POS*/
+            "pop-pos", /*OP_POP_POS*/
+            "push-pos-not", /*OP_PUSH_POS_NOT*/
+            "fail-pos", /*OP_FAIL_POS*/
+            "push-stop-bt", /*OP_PUSH_STOP_BT*/
+            "pop-stop-bt", /*OP_POP_STOP_BT*/
+            "look-behind", /*OP_LOOK_BEHIND*/
+            "push-look-behind-not", /*OP_PUSH_LOOK_BEHIND_NOT*/
+            "fail-look-behind-not", /*OP_FAIL_LOOK_BEHIND_NOT*/
+            "call", /*OP_CALL*/
+            "return", /*OP_RETURN*/
+            "state-check-push", /*OP_STATE_CHECK_PUSH*/
+            "state-check-push-or-jump", /*OP_STATE_CHECK_PUSH_OR_JUMP*/
+            "state-check", /*OP_STATE_CHECK*/
+            "state-check-anychar*", /*OP_STATE_CHECK_ANYCHAR_STAR*/
+            "state-check-anychar-ml*", /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
+            "set-option-push", /*OP_SET_OPTION_PUSH*/
+            "set-option", /*OP_SET_OPTION*/
+
+            // single byte versions
+            "anychar-sb", /*OP_ANYCHAR*/
+            "anychar-ml-sb", /*OP_ANYCHAR_ML*/
+            "anychar*-sb", /*OP_ANYCHAR_STAR*/
+            "anychar-ml*-sb", /*OP_ANYCHAR_ML_STAR*/
+            "anychar*-peek-next-sb", /*OP_ANYCHAR_STAR_PEEK_NEXT*/
+            "anychar-ml*-peek-next-sb", /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
+            "state-check-anychar*-sb", /*OP_STATE_CHECK_ANYCHAR_STAR*/
+            "state-check-anychar-ml*-sb", /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
+
+            "cclass-sb", /*OP_CCLASS*/
+            "cclass-not-sb", /*OP_CCLASS_NOT*/
+
+            "word-sb", /*OP_WORD*/
+            "not-word-sb", /*OP_NOT_WORD*/
+            "word-bound-sb", /*OP_WORD_BOUND*/
+            "not-word-bound-sb", /*OP_NOT_WORD_BOUND*/
+            "word-begin-sb", /*OP_WORD_BEGIN*/
+            "word-end-sb", /*OP_WORD_END*/
+
+            "look-behind-sb", /*OP_LOOK_BEHIND*/
+
+            "exact1-ic-sb", /*OP_EXACT1_IC*/
+            "exactn-ic-sb", /*OP_EXACTN_IC*/
+
+    };
+
+    private final static int OpCodeArgTypes[] = new int[] {
+            Arguments.NON, /*OP_FINISH*/
+            Arguments.NON, /*OP_END*/
+            Arguments.SPECIAL, /*OP_EXACT1*/
+            Arguments.SPECIAL, /*OP_EXACT2*/
+            Arguments.SPECIAL, /*OP_EXACT3*/
+            Arguments.SPECIAL, /*OP_EXACT4*/
+            Arguments.SPECIAL, /*OP_EXACT5*/
+            Arguments.SPECIAL, /*OP_EXACTN*/
+            Arguments.SPECIAL, /*OP_EXACTMB2N1*/
+            Arguments.SPECIAL, /*OP_EXACTMB2N2*/
+            Arguments.SPECIAL, /*OP_EXACTMB2N3*/
+            Arguments.SPECIAL, /*OP_EXACTMB2N*/
+            Arguments.SPECIAL, /*OP_EXACTMB3N*/
+            Arguments.SPECIAL, /*OP_EXACTMBN*/
+            Arguments.SPECIAL, /*OP_EXACT1_IC*/
+            Arguments.SPECIAL, /*OP_EXACTN_IC*/
+            Arguments.SPECIAL, /*OP_CCLASS*/
+            Arguments.SPECIAL, /*OP_CCLASS_MB*/
+            Arguments.SPECIAL, /*OP_CCLASS_MIX*/
+            Arguments.SPECIAL, /*OP_CCLASS_NOT*/
+            Arguments.SPECIAL, /*OP_CCLASS_MB_NOT*/
+            Arguments.SPECIAL, /*OP_CCLASS_MIX_NOT*/
+            Arguments.SPECIAL, /*OP_CCLASS_NODE*/
+            Arguments.NON, /*OP_ANYCHAR*/
+            Arguments.NON, /*OP_ANYCHAR_ML*/
+            Arguments.NON, /*OP_ANYCHAR_STAR*/
+            Arguments.NON, /*OP_ANYCHAR_ML_STAR*/
+            Arguments.SPECIAL, /*OP_ANYCHAR_STAR_PEEK_NEXT*/
+            Arguments.SPECIAL, /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
+            Arguments.NON, /*OP_WORD*/
+            Arguments.NON, /*OP_NOT_WORD*/
+            Arguments.NON, /*OP_WORD_BOUND*/
+            Arguments.NON, /*OP_NOT_WORD_BOUND*/
+            Arguments.NON, /*OP_WORD_BEGIN*/
+            Arguments.NON, /*OP_WORD_END*/
+            Arguments.NON, /*OP_BEGIN_BUF*/
+            Arguments.NON, /*OP_END_BUF*/
+            Arguments.NON, /*OP_BEGIN_LINE*/
+            Arguments.NON, /*OP_END_LINE*/
+            Arguments.NON, /*OP_SEMI_END_BUF*/
+            Arguments.NON, /*OP_BEGIN_POSITION*/
+            Arguments.NON, /*OP_BACKREF1*/
+            Arguments.NON, /*OP_BACKREF2*/
+            Arguments.MEMNUM, /*OP_BACKREFN*/
+            Arguments.SPECIAL, /*OP_BACKREFN_IC*/
+            Arguments.SPECIAL, /*OP_BACKREF_MULTI*/
+            Arguments.SPECIAL, /*OP_BACKREF_MULTI_IC*/
+            Arguments.SPECIAL, /*OP_BACKREF_AT_LEVEL*/
+            Arguments.MEMNUM, /*OP_MEMORY_START*/
+            Arguments.MEMNUM, /*OP_MEMORY_START_PUSH*/
+            Arguments.MEMNUM, /*OP_MEMORY_END_PUSH*/
+            Arguments.MEMNUM, /*OP_MEMORY_END_PUSH_REC*/
+            Arguments.MEMNUM, /*OP_MEMORY_END*/
+            Arguments.MEMNUM, /*OP_MEMORY_END_REC*/
+            Arguments.NON, /*OP_FAIL*/
+            Arguments.RELADDR, /*OP_JUMP*/
+            Arguments.RELADDR, /*OP_PUSH*/
+            Arguments.NON, /*OP_POP*/
+            Arguments.SPECIAL, /*OP_PUSH_OR_JUMP_EXACT1*/
+            Arguments.SPECIAL, /*OP_PUSH_IF_PEEK_NEXT*/
+            Arguments.SPECIAL, /*OP_REPEAT*/
+            Arguments.SPECIAL, /*OP_REPEAT_NG*/
+            Arguments.MEMNUM, /*OP_REPEAT_INC*/
+            Arguments.MEMNUM, /*OP_REPEAT_INC_NG*/
+            Arguments.MEMNUM, /*OP_REPEAT_INC_SG*/
+            Arguments.MEMNUM, /*OP_REPEAT_INC_NG_SG*/
+            Arguments.MEMNUM, /*OP_NULL_CHECK_START*/
+            Arguments.MEMNUM, /*OP_NULL_CHECK_END*/
+            Arguments.MEMNUM, /*OP_NULL_CHECK_END_MEMST*/
+            Arguments.MEMNUM, /*OP_NULL_CHECK_END_MEMST_PUSH*/
+            Arguments.NON, /*OP_PUSH_POS*/
+            Arguments.NON, /*OP_POP_POS*/
+            Arguments.RELADDR, /*OP_PUSH_POS_NOT*/
+            Arguments.NON, /*OP_FAIL_POS*/
+            Arguments.NON, /*OP_PUSH_STOP_BT*/
+            Arguments.NON, /*OP_POP_STOP_BT*/
+            Arguments.SPECIAL, /*OP_LOOK_BEHIND*/
+            Arguments.SPECIAL, /*OP_PUSH_LOOK_BEHIND_NOT*/
+            Arguments.NON, /*OP_FAIL_LOOK_BEHIND_NOT*/
+            Arguments.ABSADDR, /*OP_CALL*/
+            Arguments.NON, /*OP_RETURN*/
+            Arguments.SPECIAL, /*OP_STATE_CHECK_PUSH*/
+            Arguments.SPECIAL, /*OP_STATE_CHECK_PUSH_OR_JUMP*/
+            Arguments.STATE_CHECK, /*OP_STATE_CHECK*/
+            Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_STAR*/
+            Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
+            Arguments.OPTION, /*OP_SET_OPTION_PUSH*/
+            Arguments.OPTION, /*OP_SET_OPTION*/
+
+            // single byte versions
+            Arguments.NON, /*OP_ANYCHAR*/
+            Arguments.NON, /*OP_ANYCHAR_ML*/
+            Arguments.NON, /*OP_ANYCHAR_STAR*/
+            Arguments.NON, /*OP_ANYCHAR_ML_STAR*/
+            Arguments.SPECIAL, /*OP_ANYCHAR_STAR_PEEK_NEXT*/
+            Arguments.SPECIAL, /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
+            Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_STAR*/
+            Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
+
+            Arguments.SPECIAL, /*OP_CCLASS*/
+            Arguments.SPECIAL, /*OP_CCLASS_NOT*/
+
+            Arguments.NON, /*OP_WORD*/
+            Arguments.NON, /*OP_NOT_WORD*/
+            Arguments.NON, /*OP_WORD_BOUND*/
+            Arguments.NON, /*OP_NOT_WORD_BOUND*/
+            Arguments.NON, /*OP_WORD_BEGIN*/
+            Arguments.NON, /*OP_WORD_END*/
+
+            Arguments.SPECIAL, /*OP_LOOK_BEHIND*/
+
+            Arguments.SPECIAL, /*OP_EXACT1_IC*/
+            Arguments.SPECIAL, /*OP_EXACTN_IC*/
+    };
+
     public ByteCodePrinter(Regex regex) {
         code = regex.code;
         codeLength = regex.codeLength;
@@ -76,8 +309,8 @@ class ByteCodePrinter {
         CClassNode cc;
         int tm, idx;
 
-        sb.append("[" + OPCode.OpCodeNames[code[bp]]);
-        int argType = OPCode.OpCodeArgTypes[code[bp]];
+        sb.append("[" + OpCodeNames[code[bp]]);
+        int argType = OpCodeArgTypes[code[bp]];
         int ip = bp;
         if (argType != Arguments.SPECIAL) {
             bp++;
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/CaptureTreeNode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/CaptureTreeNode.java
deleted file mode 100644
index 268f682c..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/CaptureTreeNode.java
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-public class CaptureTreeNode {
-
-
-    int group;
-    int beg;
-    int end;
-    // int allocated;
-    int numChildren;
-    CaptureTreeNode[]children;
-
-    CaptureTreeNode() {
-        beg = Region.REGION_NOTPOS;
-        end = Region.REGION_NOTPOS;
-        group = -1;
-    }
-
-    static final int HISTORY_TREE_INIT_ALLOC_SIZE = 8;
-    void addChild(CaptureTreeNode child) {
-        if (children == null) {
-            children = new CaptureTreeNode[HISTORY_TREE_INIT_ALLOC_SIZE];
-        } else if (numChildren >= children.length) {
-            CaptureTreeNode[]tmp = new CaptureTreeNode[children.length << 1];
-            System.arraycopy(children, 0, tmp, 0, children.length);
-            children = tmp;
-        }
-
-        children[numChildren] = child;
-        numChildren++;
-    }
-
-    void clear() {
-        for (int i=0; i<numChildren; i++) {
-            children[i] = null; // ???
-        }
-        numChildren = 0;
-        beg = end = Region.REGION_NOTPOS;
-        group = -1;
-    }
-
-    CaptureTreeNode cloneTree() {
-        CaptureTreeNode clone = new CaptureTreeNode();
-        clone.beg = beg;
-        clone.end = end;
-
-        for (int i=0; i<numChildren; i++) {
-            CaptureTreeNode child = children[i].cloneTree();
-            clone.addChild(child);
-        }
-        return clone;
-    }
-
-
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Compiler.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Compiler.java
index 8fdc240f..c3356add 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Compiler.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Compiler.java
@@ -22,8 +22,6 @@ package jdk.nashorn.internal.runtime.regexp.joni;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.AnchorNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.BackRefNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.CClassNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CTypeNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CallNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.ConsAltNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.EncloseNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.Node;
@@ -56,7 +54,7 @@ abstract class Compiler implements ErrorMessages {
 
     private void compileStringRawNode(StringNode sn) {
         if (sn.length() <= 0) return;
-        addCompileString(sn.chars, sn.p, 1 /*sb*/, sn.length(), false);
+        addCompileString(sn.chars, sn.p, sn.length(), false);
     }
 
     private void compileStringNode(StringNode node) {
@@ -76,17 +74,14 @@ abstract class Compiler implements ErrorMessages {
             slen++;
             p++;
         }
-        addCompileString(chars, prev, 1, slen, ambig);
+        addCompileString(chars, prev, slen, ambig);
     }
 
-    protected abstract void addCompileString(char[] chars, int p, int mbLength, int strLength, boolean ignoreCase);
+    protected abstract void addCompileString(char[] chars, int p, int strLength, boolean ignoreCase);
 
     protected abstract void compileCClassNode(CClassNode node);
-    protected abstract void compileCTypeNode(CTypeNode node);
     protected abstract void compileAnyCharNode();
-    protected abstract void compileCallNode(CallNode node);
     protected abstract void compileBackrefNode(BackRefNode node);
-    protected abstract void compileCECQuantifierNode(QuantifierNode node);
     protected abstract void compileNonCECQuantifierNode(QuantifierNode node);
     protected abstract void compileOptionNode(EncloseNode node);
     protected abstract void compileEncloseNode(EncloseNode node);
@@ -118,10 +113,6 @@ abstract class Compiler implements ErrorMessages {
             compileCClassNode((CClassNode)node);
             break;
 
-        case NodeType.CTYPE:
-            compileCTypeNode((CTypeNode)node);
-            break;
-
         case NodeType.CANY:
             compileAnyCharNode();
             break;
@@ -130,19 +121,8 @@ abstract class Compiler implements ErrorMessages {
             compileBackrefNode((BackRefNode)node);
             break;
 
-        case NodeType.CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                compileCallNode((CallNode)node);
-                break;
-            } // USE_SUBEXP_CALL
-            break;
-
         case NodeType.QTFR:
-            if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-                compileCECQuantifierNode((QuantifierNode)node);
-            } else {
-                compileNonCECQuantifierNode((QuantifierNode)node);
-            }
+            compileNonCECQuantifierNode((QuantifierNode)node);
             break;
 
         case NodeType.ENCLOSE:
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Config.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Config.java
index 04f5b47b..b8ade1fa 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Config.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Config.java
@@ -31,10 +31,6 @@ public interface Config {
     final int ENC_CASE_FOLD_DEFAULT = ENC_CASE_FOLD_MIN;
     final boolean USE_CRNL_AS_LINE_TERMINATOR = false;
 
-    final boolean USE_NAMED_GROUP = true;
-    final boolean USE_SUBEXP_CALL = true;
-    final boolean USE_BACKREF_WITH_LEVEL = true;                            /* \k<name+n>, \k<name-n> */
-
     final boolean USE_MONOMANIAC_CHECK_CAPTURES_IN_ENDLESS_REPEAT = true; /* /(?:()|())*\2/ */
     final boolean USE_NEWLINE_AT_END_OF_STRING_HAS_EMPTY_LINE = true;     /* /\n$/ =~ "\n" */
     final boolean USE_WARNING_REDUNDANT_NESTED_REPEAT_OPERATOR = false;
@@ -42,12 +38,10 @@ public interface Config {
     final boolean CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS = true;
 
     final boolean USE_MATCH_RANGE_MUST_BE_INSIDE_OF_SPECIFIED_RANGE = false;
-    final boolean USE_CAPTURE_HISTORY = false;
     final boolean USE_VARIABLE_META_CHARS = true;
     final boolean USE_WORD_BEGIN_END = true;                                /* "\<": word-begin, "\>": word-end */
-    final boolean USE_POSIX_API_REGION_OPTION = true;                           /* needed for POSIX API support */
+    final boolean USE_POSIX_API_REGION_OPTION = false;                           /* needed for POSIX API support */
     final boolean USE_FIND_LONGEST_SEARCH_ALL_OF_RANGE = true;
-    final boolean USE_COMBINATION_EXPLOSION_CHECK = false;
 
     final int NREGION                   = 10;
     final int MAX_BACKREF_NUM           = 1000;
@@ -73,13 +67,6 @@ public interface Config {
 
     final boolean USE_STRING_TEMPLATES              = true; // use embeded string templates in Regex object as byte arrays instead of compiling them into int bytecode array
 
-
-    final int MAX_CAPTURE_HISTORY_GROUP             = 31;
-
-
-    final int CHECK_STRING_THRESHOLD_LEN            = 7;
-    final int CHECK_BUFF_MAX_SIZE                   = 0x4000;
-
     final boolean NON_UNICODE_SDW                   = true;
 
 
@@ -95,6 +82,4 @@ public interface Config {
     final boolean DEBUG_COMPILE_BYTE_CODE_INFO      = DEBUG_ALL;
     final boolean DEBUG_SEARCH                      = DEBUG_ALL;
     final boolean DEBUG_MATCH                       = DEBUG_ALL;
-    final boolean DEBUG_ASM                         = true;
-    final boolean DEBUG_ASM_EXEC                    = true;
 }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/EncodingHelper.java b/src/jdk/nashorn/internal/runtime/regexp/joni/EncodingHelper.java
index d3e54947..8c274fe0 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/EncodingHelper.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/EncodingHelper.java
@@ -95,20 +95,6 @@ public class EncodingHelper {
        return s;
     }
 
-    /* onigenc_with_ascii_strncmp */
-    public static int strNCmp(char[] chars1, int p1, int end, char[] chars2, int p2, int n) {
-        while (n-- > 0) {
-            if (p1 >= end) return chars2[p2];
-            int c = chars1[p1];
-            int x = chars2[p2] - c;
-            if (x != 0) return x;
-
-            p2++;
-            p1++;
-        }
-        return 0;
-    }
-
     public static int mbcToCode(byte[] bytes, int p, int end) {
         int code = 0;
         for (int i = p; i < end; i++) {
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Lexer.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Lexer.java
index c289f33d..53ab3ec0 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Lexer.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Lexer.java
@@ -27,10 +27,7 @@ import jdk.nashorn.internal.runtime.regexp.joni.constants.AnchorType;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.MetaChar;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.TokenType;
 import jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType;
-import jdk.nashorn.internal.runtime.regexp.joni.encoding.PosixBracket;
-import jdk.nashorn.internal.runtime.regexp.joni.encoding.Ptr;
 import jdk.nashorn.internal.runtime.regexp.joni.exception.ErrorMessages;
-import jdk.nashorn.internal.runtime.regexp.joni.exception.JOniException;
 
 class Lexer extends ScannerSupport {
     protected final ScanEnvironment env;
@@ -215,198 +212,6 @@ class Lexer extends ScannerSupport {
         \k<-num+n>, \k<-num-n>
      */
 
-    // value implicit (rnameEnd)
-    private boolean fetchNameWithLevel(int startCode, Ptr rbackNum, Ptr rlevel) {
-        int src = p;
-        boolean existLevel = false;
-        int isNum = 0;
-        int sign = 1;
-
-        int endCode = nameEndCodePoint(startCode);
-        int pnumHead = p;
-        int nameEnd = stop;
-
-        String err = null;
-        if (!left()) {
-            newValueException(ERR_EMPTY_GROUP_NAME);
-        } else {
-            fetch();
-            if (c == endCode) newValueException(ERR_EMPTY_GROUP_NAME);
-            if (Character.isDigit(c)) {
-                isNum = 1;
-            } else if (c == '-') {
-                isNum = 2;
-                sign = -1;
-                pnumHead = p;
-            } else if (!EncodingHelper.isWord(c)) {
-                err = ERR_INVALID_GROUP_NAME;
-            }
-        }
-
-        while (left()) {
-            nameEnd = p;
-            fetch();
-            if (c == endCode || c == ')' || c == '+' || c == '-') {
-                if (isNum == 2) err = ERR_INVALID_GROUP_NAME;
-                break;
-            }
-
-            if (isNum != 0) {
-                if (EncodingHelper.isDigit(c)) {
-                    isNum = 1;
-                } else {
-                    err = ERR_INVALID_GROUP_NAME;
-                    // isNum = 0;
-                }
-            } else if (!EncodingHelper.isWord(c)) {
-                err = ERR_INVALID_CHAR_IN_GROUP_NAME;
-            }
-        }
-
-        boolean isEndCode = false;
-        if (err == null && c != endCode) {
-            if (c == '+' || c == '-') {
-                int flag = c == '-' ? -1 : 1;
-
-                fetch();
-                if (!EncodingHelper.isDigit(c)) newValueException(ERR_INVALID_GROUP_NAME, src, stop);
-                unfetch();
-                int level = scanUnsignedNumber();
-                if (level < 0) newValueException(ERR_TOO_BIG_NUMBER);
-                rlevel.p = level * flag;
-                existLevel = true;
-
-                fetch();
-                isEndCode = c == endCode;
-            }
-
-            if (!isEndCode) {
-                err = ERR_INVALID_GROUP_NAME;
-                nameEnd = stop;
-            }
-        }
-
-        if (err == null) {
-            if (isNum != 0) {
-                mark();
-                p = pnumHead;
-                int backNum = scanUnsignedNumber();
-                restore();
-                if (backNum < 0) {
-                    newValueException(ERR_TOO_BIG_NUMBER);
-                } else if (backNum == 0) {
-                    newValueException(ERR_INVALID_GROUP_NAME, src, stop);
-                }
-                rbackNum.p = backNum * sign;
-            }
-            value = nameEnd;
-            return existLevel;
-        } else {
-            newValueException(ERR_INVALID_GROUP_NAME, src, nameEnd);
-            return false; // not reached
-        }
-    }
-
-    // USE_NAMED_GROUP
-    // ref: 0 -> define name    (don't allow number name)
-    //      1 -> reference name (allow number name)
-    private int fetchNameForNamedGroup(int startCode, boolean ref) {
-        int src = p;
-        value = 0;
-
-        int isNum = 0;
-        int sign = 1;
-
-        int endCode = nameEndCodePoint(startCode);
-        int pnumHead = p;
-        int nameEnd = stop;
-
-        String err = null;
-        if (!left()) {
-            newValueException(ERR_EMPTY_GROUP_NAME);
-        } else {
-            fetch();
-            if (c == endCode) newValueException(ERR_EMPTY_GROUP_NAME);
-            if (EncodingHelper.isDigit(c)) {
-                if (ref) {
-                    isNum = 1;
-                } else {
-                    err = ERR_INVALID_GROUP_NAME;
-                    // isNum = 0;
-                }
-            } else if (c == '-') {
-                if (ref) {
-                    isNum = 2;
-                    sign = -1;
-                    pnumHead = p;
-                } else {
-                    err = ERR_INVALID_GROUP_NAME;
-                    // isNum = 0;
-                }
-            } else if (!EncodingHelper.isWord(c)) {
-                err = ERR_INVALID_CHAR_IN_GROUP_NAME;
-            }
-        }
-
-        if (err == null) {
-            while (left()) {
-                nameEnd = p;
-                fetch();
-                if (c == endCode || c == ')') {
-                    if (isNum == 2) err = ERR_INVALID_GROUP_NAME;
-                    break;
-                }
-
-                if (isNum != 0) {
-                    if (EncodingHelper.isDigit(c)) {
-                        isNum = 1;
-                    } else {
-                        if (!EncodingHelper.isWord(c)) {
-                            err = ERR_INVALID_CHAR_IN_GROUP_NAME;
-                        } else {
-                            err = ERR_INVALID_GROUP_NAME;
-                        }
-                        // isNum = 0;
-                    }
-                } else {
-                    if (!EncodingHelper.isWord(c)) {
-                        err = ERR_INVALID_CHAR_IN_GROUP_NAME;
-                    }
-                }
-            }
-
-            if (c != endCode) {
-                err = ERR_INVALID_GROUP_NAME;
-                nameEnd = stop;
-            }
-
-            int backNum = 0;
-            if (isNum != 0) {
-                mark();
-                p = pnumHead;
-                backNum = scanUnsignedNumber();
-                restore();
-                if (backNum < 0) {
-                    newValueException(ERR_TOO_BIG_NUMBER);
-                } else if (backNum == 0) {
-                    newValueException(ERR_INVALID_GROUP_NAME, src, nameEnd);
-                }
-                backNum *= sign;
-            }
-            value = nameEnd;
-            return backNum;
-        } else {
-            while (left()) {
-                nameEnd = p;
-                fetch();
-                if (c == endCode || c == ')') break;
-            }
-            if (!left()) nameEnd = stop;
-            newValueException(err, src, nameEnd);
-            return 0; // not reached
-        }
-    }
-
     // #else USE_NAMED_GROUP
     // make it return nameEnd!
     private final int fetchNameForNoNamedGroup(int startCode, boolean ref) {
@@ -472,11 +277,7 @@ class Lexer extends ScannerSupport {
     }
 
     protected final int fetchName(int startCode, boolean ref) {
-        if (Config.USE_NAMED_GROUP) {
-            return fetchNameForNamedGroup(startCode, ref);
-        } else {
-            return fetchNameForNoNamedGroup(startCode, ref);
-        }
+        return fetchNameForNoNamedGroup(startCode, ref);
     }
 
     private boolean strExistCheckWithEsc(int[]s, int n, int bad) {
@@ -519,26 +320,6 @@ class Lexer extends ScannerSupport {
         token.setPropNot(flag);
     }
 
-    private void fetchTokenInCCFor_p() {
-        int c2 = peek(); // !!! migrate to peekIs
-        if (c2 == '{' && syntax.op2EscPBraceCharProperty()) {
-            inc();
-            token.type = TokenType.CHAR_PROPERTY;
-            token.setPropNot(c == 'P');
-
-            if (syntax.op2EscPBraceCircumflexNot()) {
-                c2 = fetchTo();
-                if (c2 == '^') {
-                    token.setPropNot(!token.getPropNot());
-                } else {
-                    unfetch();
-                }
-            }
-        } else {
-            syntaxWarn(Warnings.INVALID_UNICODE_PROPERTY, (char)c);
-        }
-    }
-
     private void fetchTokenInCCFor_x() {
         if (!left()) return;
         int last = p;
@@ -604,30 +385,6 @@ class Lexer extends ScannerSupport {
         }
     }
 
-    private void fetchTokenInCCFor_posixBracket() {
-        if (syntax.opPosixBracket() && peekIs(':')) {
-            token.backP = p; /* point at '[' is readed */
-            inc();
-            if (strExistCheckWithEsc(send, send.length, ']')) {
-                token.type = TokenType.POSIX_BRACKET_OPEN;
-            } else {
-                unfetch();
-                // remove duplication, goto cc_in_cc;
-                if (syntax.op2CClassSetOp()) {
-                    token.type = TokenType.CC_CC_OPEN;
-                } else {
-                    env.ccEscWarn("[");
-                }
-            }
-        } else { // cc_in_cc:
-            if (syntax.op2CClassSetOp()) {
-                token.type = TokenType.CC_CC_OPEN;
-            } else {
-                env.ccEscWarn("[");
-            }
-        }
-    }
-
     private void fetchTokenInCCFor_and() {
         if (syntax.op2CClassSetOp() && left() && peekIs('&')) {
             inc();
@@ -683,10 +440,6 @@ class Lexer extends ScannerSupport {
             case 'H':
                 if (syntax.op2EscHXDigit()) fetchTokenInCCFor_charType(true, CharacterType.XDIGIT);
                 break;
-            case 'p':
-            case 'P':
-                fetchTokenInCCFor_p();
-                break;
             case 'x':
                 fetchTokenInCCFor_x();
                 break;
@@ -714,18 +467,12 @@ class Lexer extends ScannerSupport {
                 break;
             } // switch
 
-        } else if (c == '[') {
-            fetchTokenInCCFor_posixBracket();
         } else if (c == '&') {
             fetchTokenInCCFor_and();
         }
         return token.type;
     }
 
-    protected final int backrefRelToAbs(int relNo) {
-        return env.numMem + 1 + relNo;
-    }
-
     private void fetchTokenFor_repeat(int lower, int upper) {
         token.type = TokenType.OP_REPEAT;
         token.setRepeatLower(lower);
@@ -815,7 +562,6 @@ class Lexer extends ScannerSupport {
             token.setBackrefNum(1);
             token.setBackrefRef1(num);
             token.setBackrefByName(false);
-            if (Config.USE_BACKREF_WITH_LEVEL) token.setBackrefExistLevel(false);
             return;
         }
 
@@ -845,76 +591,6 @@ class Lexer extends ScannerSupport {
         }
     }
 
-    private void fetchTokenFor_namedBackref() {
-        if (syntax.op2EscKNamedBackref()) {
-            if (left()) {
-                fetch();
-                if (c =='<' || c == '\'') {
-                    int last = p;
-                    int backNum;
-                    if (Config.USE_BACKREF_WITH_LEVEL) {
-                        Ptr rbackNum = new Ptr();
-                        Ptr rlevel = new Ptr();
-                        token.setBackrefExistLevel(fetchNameWithLevel(c, rbackNum, rlevel));
-                        token.setBackrefLevel(rlevel.p);
-                        backNum = rbackNum.p;
-                    } else {
-                        backNum = fetchName(c, true);
-                    } // USE_BACKREF_AT_LEVEL
-                    int nameEnd = value; // set by fetchNameWithLevel/fetchName
-
-                    if (backNum != 0) {
-                        if (backNum < 0) {
-                            backNum = backrefRelToAbs(backNum);
-                            if (backNum <= 0) newValueException(ERR_INVALID_BACKREF);
-                        }
-
-                        if (syntax.strictCheckBackref() && (backNum > env.numMem || env.memNodes == null)) {
-                            newValueException(ERR_INVALID_BACKREF);
-                        }
-                        token.type = TokenType.BACKREF;
-                        token.setBackrefByName(false);
-                        token.setBackrefNum(1);
-                        token.setBackrefRef1(backNum);
-                    } else {
-                        NameEntry e = env.reg.nameToGroupNumbers(chars, last, nameEnd);
-                        if (e == null) newValueException(ERR_UNDEFINED_NAME_REFERENCE, last, nameEnd);
-
-                        if (syntax.strictCheckBackref()) {
-                            if (e.backNum == 1) {
-                                if (e.backRef1 > env.numMem ||
-                                    env.memNodes == null ||
-                                    env.memNodes[e.backRef1] == null) newValueException(ERR_INVALID_BACKREF);
-                            } else {
-                                for (int i=0; i<e.backNum; i++) {
-                                    if (e.backRefs[i] > env.numMem ||
-                                        env.memNodes == null ||
-                                        env.memNodes[e.backRefs[i]] == null) newValueException(ERR_INVALID_BACKREF);
-                                }
-                            }
-                        }
-
-                        token.type = TokenType.BACKREF;
-                        token.setBackrefByName(true);
-
-                        if (e.backNum == 1) {
-                            token.setBackrefNum(1);
-                            token.setBackrefRef1(e.backRef1);
-                        } else {
-                            token.setBackrefNum(e.backNum);
-                            token.setBackrefRefs(e.backRefs);
-                        }
-                    }
-                } else {
-                    unfetch();
-                    syntaxWarn(Warnings.INVALID_BACKREFERENCE);
-                }
-            } else {
-                syntaxWarn(Warnings.INVALID_BACKREFERENCE);
-            }
-        }
-    }
-
     private void fetchTokenFor_subexpCall() {
         if (syntax.op2EscGSubexpCall()) {
             if (left()) {
@@ -937,25 +613,6 @@ class Lexer extends ScannerSupport {
         }
     }
 
-    private void fetchTokenFor_charProperty() {
-        if (peekIs('{') && syntax.op2EscPBraceCharProperty()) {
-            inc();
-            token.type = TokenType.CHAR_PROPERTY;
-            token.setPropNot(c == 'P');
-
-            if (syntax.op2EscPBraceCircumflexNot()) {
-                fetch();
-                if (c == '^') {
-                    token.setPropNot(!token.getPropNot());
-                } else {
-                    unfetch();
-                }
-            }
-        } else {
-            syntaxWarn(Warnings.INVALID_UNICODE_PROPERTY, (char)c);
-        }
-    }
-
     private void fetchTokenFor_metaChars() {
         if (c == syntax.metaCharTable.anyChar) {
             token.type = TokenType.ANYCHAR;
@@ -1091,19 +748,6 @@ class Lexer extends ScannerSupport {
                 case '0':
                     fetchTokenFor_zero();
                     break;
-                case 'k':
-                    if (Config.USE_NAMED_GROUP) fetchTokenFor_namedBackref();
-                    break;
-                case 'g':
-                    if (Config.USE_SUBEXP_CALL) fetchTokenFor_subexpCall();
-                    break;
-                case 'Q':
-                    if (syntax.op2EscCapitalQQuote()) token.type = TokenType.QUOTE_OPEN;
-                    break;
-                case 'p':
-                case 'P':
-                    fetchTokenFor_charProperty();
-                    break;
 
                 default:
                     unfetch();
@@ -1244,24 +888,6 @@ class Lexer extends ScannerSupport {
         }
     }
 
-    protected final int fetchCharPropertyToCType() {
-        mark();
-
-        while (left()) {
-            int last = p;
-            fetch();
-            if (c == '}') {
-                String name = new String(chars, _p, last - _p);
-                return PosixBracket.propertyNameToCType(name);
-            } else if (c == '(' || c == ')' || c == '{' || c == '|') {
-                String name = new String(chars, _p, last - _p);
-                throw new JOniException(ERR_INVALID_CHAR_PROPERTY_NAME.replaceAll("%n", name));
-            }
-        }
-        newInternalException(ERR_PARSER_BUG);
-        return 0; // not reached
-    }
-
     protected final void syntaxWarn(String message, char c) {
         syntaxWarn(message.replace("<%n>", Character.toString(c)));
     }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Matcher.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Matcher.java
index 4aea4acb..911b23b3 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Matcher.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Matcher.java
@@ -58,17 +58,10 @@ public abstract class Matcher extends IntHolder {
     // main matching method
     protected abstract int matchAt(int range, int sstart, int sprev);
 
-    protected abstract void stateCheckBuffInit(int strLength, int offset, int stateNum);
-    protected abstract void stateCheckBuffClear();
-
     public final Region getRegion() {
         return msaRegion;
     }
 
-    public final Region getEagerRegion() {
-        return msaRegion != null ? msaRegion : new Region(msaBegin, msaEnd);
-    }
-
     public final int getBegin() {
         return msaBegin;
     }
@@ -86,11 +79,6 @@ public abstract class Matcher extends IntHolder {
     public final int match(int at, int range, int option) {
         msaInit(option, at);
 
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-            int offset = at = str;
-            stateCheckBuffInit(end - str, offset, regex.numCombExpCheck); // move it to construction?
-        } // USE_COMBINATION_EXPLOSION_CHECK
-
         int prev = EncodingHelper.prevCharHead(str, at);
 
         if (Config.USE_MATCH_RANGE_MUST_BE_INSIDE_OF_SPECIFIED_RANGE) {
@@ -377,8 +365,6 @@ public abstract class Matcher extends IntHolder {
                 prev = -1;
                 msaInit(option, start);
 
-                if (Config.USE_COMBINATION_EXPLOSION_CHECK) stateCheckBuffClear();
-
                 if (matchCheck(end, s, prev)) return match(s);
                 return mismatch();
             }
@@ -393,10 +379,6 @@ public abstract class Matcher extends IntHolder {
         }
 
         msaInit(option, origStart);
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-            int offset = Math.min(start, range) - str;
-            stateCheckBuffInit(end - str, offset, regex.numCombExpCheck);
-        }
 
         s = start;
         if (range > start) {    /* forward search */
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/NameEntry.java b/src/jdk/nashorn/internal/runtime/regexp/joni/NameEntry.java
deleted file mode 100644
index d35f7251..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/NameEntry.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-public final class NameEntry {
-    static final int INIT_NAME_BACKREFS_ALLOC_NUM = 8;
-
-    public final char[] name;
-    public final int nameP;
-    public final int nameEnd;
-
-    int backNum;
-    int backRef1;
-    int backRefs[];
-
-    public NameEntry(char[] chars, int p, int end) {
-        name = chars;
-        nameP = p;
-        nameEnd = end;
-    }
-
-    public int[] getBackRefs() {
-        switch (backNum) {
-        case 0:
-            return new int[]{};
-        case 1:
-            return new int[]{backRef1};
-        default:
-            int[]result = new int[backNum];
-            System.arraycopy(backRefs, 0, result, 0, backNum);
-            return result;
-        }
-    }
-
-    private void alloc() {
-        backRefs = new int[INIT_NAME_BACKREFS_ALLOC_NUM];
-    }
-
-    private void ensureSize() {
-        if (backNum > backRefs.length) {
-            int[]tmp = new int[backRefs.length << 1];
-            System.arraycopy(backRefs, 0, tmp, 0, backRefs.length);
-            backRefs = tmp;
-        }
-    }
-
-    public void addBackref(int backRef) {
-        backNum++;
-
-        switch (backNum) {
-            case 1:
-                backRef1 = backRef;
-                break;
-            case 2:
-                alloc();
-                backRefs[0] = backRef1;
-                backRefs[1] = backRef;
-                break;
-            default:
-                ensureSize();
-                backRefs[backNum - 1] = backRef;
-        }
-    }
-
-    public String toString() {
-        StringBuilder buff = new StringBuilder(new String(name, nameP, nameEnd - nameP) + " ");
-        if (backNum == 0) {
-            buff.append("-");
-        } else if (backNum == 1){
-            buff.append(backRef1);
-        } else {
-            for (int i=0; i<backNum; i++){
-                if (i > 0) buff.append(", ");
-                buff.append(backRefs[i]);
-            }
-        }
-        return buff.toString();
-    }
-
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/NativeMachine.java b/src/jdk/nashorn/internal/runtime/regexp/joni/NativeMachine.java
deleted file mode 100644
index 2a3f2a13..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/NativeMachine.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-public abstract class NativeMachine extends Matcher {
-
-    protected NativeMachine(Regex regex, char[] chars, int p, int end) {
-        super(regex, chars, p, end);
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Parser.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Parser.java
index 13d569b7..749b1d41 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Parser.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Parser.java
@@ -19,20 +19,15 @@
  */
 package jdk.nashorn.internal.runtime.regexp.joni;
 
-import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsOnAtSimple;
 import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsOnOff;
 import static jdk.nashorn.internal.runtime.regexp.joni.Option.isDontCaptureGroup;
 import static jdk.nashorn.internal.runtime.regexp.joni.Option.isIgnoreCase;
 
 import jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType;
-import jdk.nashorn.internal.runtime.regexp.joni.encoding.PosixBracket;
-import jdk.nashorn.internal.runtime.regexp.joni.encoding.Ptr;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.AnchorNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.AnyCharNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.BackRefNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.CClassNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CTypeNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.CallNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.ConsAltNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.EncloseNode;
 import jdk.nashorn.internal.runtime.regexp.joni.ast.Node;
@@ -66,65 +61,6 @@ class Parser extends Lexer {
         return root;
     }
 
-    private static final int POSIX_BRACKET_NAME_MIN_LEN            = 4;
-    private static final int POSIX_BRACKET_CHECK_LIMIT_LENGTH      = 20;
-    private static final char BRACKET_END[]                        = ":]".toCharArray();
-    private boolean parsePosixBracket(CClassNode cc) {
-        mark();
-
-        boolean not;
-        if (peekIs('^')) {
-            inc();
-            not = true;
-        } else {
-            not = false;
-        }
-        if (stop - p >= POSIX_BRACKET_NAME_MIN_LEN + 3) { // else goto not_posix_bracket
-            char[][] pbs = PosixBracket.PBSNamesLower;
-            for (int i=0; i<pbs.length; i++) {
-                char[] name = pbs[i];
-                // hash lookup here ?
-                if (EncodingHelper.strNCmp(chars, p, stop, name, 0, name.length) == 0) {
-                    p += name.length;
-                    if (EncodingHelper.strNCmp(chars, p, stop, BRACKET_END, 0, BRACKET_END.length) != 0) {
-                        newSyntaxException(ERR_INVALID_POSIX_BRACKET_TYPE);
-                    }
-                    cc.addCType(PosixBracket.PBSValues[i], not, env, this);
-                    inc();
-                    inc();
-                    return false;
-                }
-            }
-
-        }
-
-        // not_posix_bracket:
-        c = 0;
-        int i= 0;
-        while (left() && ((c=peek()) != ':') && c != ']') {
-            inc();
-            if (++i > POSIX_BRACKET_CHECK_LIMIT_LENGTH) break;
-        }
-
-        if (c == ':' && left()) {
-            inc();
-            if (left()) {
-                fetch();
-                if (c == ']') newSyntaxException(ERR_INVALID_POSIX_BRACKET_TYPE);
-            }
-        }
-        restore();
-        return true; /* 1: is not POSIX bracket, but no error. */
-    }
-
-    private CClassNode parseCharProperty() {
-        int ctype = fetchCharPropertyToCType();
-        CClassNode n = new CClassNode();
-        n.addCType(ctype, false, env, this);
-        if (token.getPropNot()) n.setNot();
-        return n;
-    }
-
     private boolean codeExistCheck(int code, boolean ignoreEscaped) {
         mark();
 
@@ -225,29 +161,11 @@ class Parser extends Lexer {
                 parseCharClassValEntry(cc, arg); // val_entry:, val_entry2
                 break;
 
-            case POSIX_BRACKET_OPEN:
-                if (parsePosixBracket(cc)) { /* true: is not POSIX bracket */
-                    env.ccEscWarn("[");
-                    p = token.backP;
-                    arg.v = token.getC();
-                    arg.vIsRaw = false;
-                    parseCharClassValEntry(cc, arg); // goto val_entry
-                    break;
-                }
-                cc.nextStateClass(arg, env); // goto next_class
-                break;
-
             case CHAR_TYPE:
                 cc.addCType(token.getPropCType(), token.getPropNot(), env, this);
                 cc.nextStateClass(arg, env); // next_class:
                 break;
 
-            case CHAR_PROPERTY:
-                int ctype = fetchCharPropertyToCType();
-                cc.addCType(ctype, token.getPropNot(), env, this);
-                cc.nextStateClass(arg, env); // goto next_class
-                break;
-
             case CC_RANGE:
                 if (arg.state == CCSTATE.VALUE) {
                     fetchTokenInCC();
@@ -413,15 +331,6 @@ class Parser extends Lexer {
                 node = new EncloseNode(EncloseType.STOP_BACKTRACK); // node_new_enclose
                 break;
             case '\'':
-                if (Config.USE_NAMED_GROUP) {
-                    if (syntax.op2QMarkLtNamedGroup()) {
-                        listCapture = false; // goto named_group1
-                        node = parseEncloseNamedGroup2(listCapture);
-                        break;
-                    } else {
-                        newSyntaxException(ERR_UNDEFINED_GROUP_OPTION);
-                    }
-                } // USE_NAMED_GROUP
                 break;
             case '<':  /* look behind (?<=...), (?<!...) */
                 fetch();
@@ -430,36 +339,12 @@ class Parser extends Lexer {
                 } else if (c == '!') {
                     node = new AnchorNode(AnchorType.LOOK_BEHIND_NOT);
                 } else {
-                    if (Config.USE_NAMED_GROUP) {
-                        if (syntax.op2QMarkLtNamedGroup()) {
-                            unfetch();
-                            c = '<';
-
-                            listCapture = false; // named_group1:
-                            node = parseEncloseNamedGroup2(listCapture); // named_group2:
-                            break;
-                        } else {
-                            newSyntaxException(ERR_UNDEFINED_GROUP_OPTION);
-                        }
-
-                    } else { // USE_NAMED_GROUP
-                        newSyntaxException(ERR_UNDEFINED_GROUP_OPTION);
-                    } // USE_NAMED_GROUP
+                    newSyntaxException(ERR_UNDEFINED_GROUP_OPTION);
                 }
                 break;
             case '@':
                 if (syntax.op2AtMarkCaptureHistory()) {
-                    if (Config.USE_NAMED_GROUP) {
-                        if (syntax.op2QMarkLtNamedGroup()) {
-                            fetch();
-                            if (c == '<' || c == '\'') {
-                                listCapture = true;
-                                node = parseEncloseNamedGroup2(listCapture); // goto named_group2 /* (?@<name>...) */
-                            }
-                            unfetch();
-                        }
-                    } // USE_NAMED_GROUP
-                    EncloseNode en = new EncloseNode(env.option, false); // node_new_enclose_memory
+                    EncloseNode en = new EncloseNode(); // node_new_enclose_memory
                     int num = env.addMemEntry();
                     if (num >= BitStatus.BIT_STATUS_BITS_NUM) newValueException(ERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY);
                     en.regNum = num;
@@ -546,7 +431,7 @@ class Parser extends Lexer {
                 returnCode = 1; /* group */
                 return node;
             }
-            EncloseNode en = new EncloseNode(env.option, false); // node_new_enclose_memory
+            EncloseNode en = new EncloseNode(); // node_new_enclose_memory
             int num = env.addMemEntry();
             en.regNum = num;
             node = en;
@@ -570,48 +455,6 @@ class Parser extends Lexer {
         return node; // ??
     }
 
-    private Node parseEncloseNamedGroup2(boolean listCapture) {
-        int nm = p;
-        int num = fetchName(c, false);
-        int nameEnd = value;
-        num = env.addMemEntry();
-        if (listCapture && num >= BitStatus.BIT_STATUS_BITS_NUM) newValueException(ERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY);
-
-        regex.nameAdd(chars, nm, nameEnd, num, syntax);
-        EncloseNode en = new EncloseNode(env.option, true); // node_new_enclose_memory
-        en.regNum = num;
-
-        Node node = en;
-
-        if (listCapture) env.captureHistory = bsOnAtSimple(env.captureHistory, num);
-        env.numNamed++;
-        return node;
-    }
-
-    private int findStrPosition(int[]s, int n, int from, int to, Ptr nextChar) {
-        int x;
-        int q;
-        int p = from;
-        int i = 0;
-        while (p < to) {
-            x = chars[p];
-            q = p + 1;
-            if (x == s[0]) {
-                for (i=1; i<n && q<to; i++) {
-                    x = chars[q];
-                    if (x != s[i]) break;
-                    q++;
-                }
-                if (i >= n) {
-                    if (chars[nextChar.p] != 0) nextChar.p = q; // we may need zero term semantics...
-                    return p;
-                }
-            }
-            p = q;
-        }
-        return -1;
-    }
-
     private Node parseExp(TokenType term) {
         if (token.type == term) return StringNode.EMPTY; // goto end_of_token
 
@@ -656,16 +499,6 @@ class Parser extends Lexer {
             node = new StringNode(buf, 0, 1);
             break;
 
-        case QUOTE_OPEN:
-            int[] endOp = new int[] {syntax.metaCharTable.esc, 'E'};
-            int qstart = p;
-            Ptr nextChar = new Ptr();
-            int qend = findStrPosition(endOp, endOp.length, qstart, stop, nextChar);
-            if (qend == -1) nextChar.p = qend = stop;
-            node = new StringNode(chars, qstart, qend);
-            p = nextChar.p;
-            break;
-
         case CHAR_TYPE:
             switch(token.getPropCType()) {
             case CharacterType.D:
@@ -679,10 +512,6 @@ class Parser extends Lexer {
                 }
                 break;
 
-            case CharacterType.WORD:
-                node = new CTypeNode(token.getPropCType(), token.getPropNot());
-                break;
-
             case CharacterType.SPACE:
             case CharacterType.DIGIT:
             case CharacterType.XDIGIT:
@@ -699,10 +528,6 @@ class Parser extends Lexer {
             } // inner switch
             break;
 
-        case CHAR_PROPERTY:
-            node = parseCharProperty();
-            break;
-
         case CC_CC_OPEN:
             CClassNode cc = parseCharClass();
             node = cc;
@@ -735,20 +560,6 @@ class Parser extends Lexer {
                             token.getBackrefExistLevel(), // #ifdef USE_BACKREF_AT_LEVEL
                             token.getBackrefLevel(),      // ...
                             env);
-
-            break;
-
-        case CALL:
-            if (Config.USE_SUBEXP_CALL) {
-                int gNum = token.getCallGNum();
-
-                if (gNum < 0) {
-                    gNum = backrefRelToAbs(gNum);
-                    if (gNum <= 0) newValueException(ERR_INVALID_BACKREF);
-                }
-                node = new CallNode(chars, token.getCallNameP(), token.getCallNameEnd(), gNum);
-                env.numCall++;
-            } // USE_SUBEXP_CALL
             break;
 
         case ANCHOR:
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Regex.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Regex.java
index da5b9827..b27814a7 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Regex.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Regex.java
@@ -23,9 +23,11 @@ import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsAt;
 import static jdk.nashorn.internal.runtime.regexp.joni.Option.isCaptureGroup;
 import static jdk.nashorn.internal.runtime.regexp.joni.Option.isDontCaptureGroup;
 
+import java.nio.file.Files;
 import java.util.HashMap;
 import java.util.Iterator;
 
+import jdk.nashorn.internal.runtime.regexp.joni.ast.Node;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.AnchorType;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.RegexState;
 import jdk.nashorn.internal.runtime.regexp.joni.exception.ErrorMessages;
@@ -44,7 +46,6 @@ public final class Regex implements RegexState {
     int numMem;             /* used memory(...) num counted from 1 */
     int numRepeat;          /* OP_REPEAT/OP_REPEAT_NG id-counter */
     int numNullCheck;       /* OP_NULL_CHECK_START/END id counter */
-    int numCombExpCheck;    /* combination explosion check */
     int numCall;            /* number of subexp call */
     int captureHistory;     /* (?@...) flag (1-31) */
     int btMemStart;         /* need backtrack flag */
@@ -57,7 +58,7 @@ public final class Regex implements RegexState {
 
     WarnCallback warnings;
     MatcherFactory factory;
-    private Analyser analyser;
+    protected Analyser analyser;
 
     int options;
     int userOptions;
@@ -65,8 +66,6 @@ public final class Regex implements RegexState {
     //final Syntax syntax;
     final int caseFoldFlag;
 
-    HashMap<String,NameEntry> nameTable;        // named entries
-
     /* optimization info (string search, char-map and anchors) */
     SearchAlgorithm searchAlgorithm;        /* optimize flag */
     int thresholdLength;                    /* search str-length for apply optimize */
@@ -172,112 +171,6 @@ public final class Regex implements RegexState {
         return numMem;
     }
 
-    public int numberOfCaptureHistories() {
-        if (Config.USE_CAPTURE_HISTORY) {
-            int n = 0;
-            for (int i=0; i<=Config.MAX_CAPTURE_HISTORY_GROUP; i++) {
-                if (bsAt(captureHistory, i)) n++;
-            }
-            return n;
-        } else {
-            return 0;
-        }
-    }
-
-    String nameTableToString() {
-        StringBuilder sb = new StringBuilder();
-
-        if (nameTable != null) {
-            sb.append("name table\n");
-            for (NameEntry ne : nameTable.values()) {
-                sb.append("  " + ne + "\n");
-            }
-            sb.append("\n");
-        }
-        return sb.toString();
-    }
-
-    NameEntry nameFind(char[] name, int nameP, int nameEnd) {
-        if (nameTable != null) return nameTable.get(new String(name, nameP, nameEnd - nameP));
-        return null;
-    }
-
-    void renumberNameTable(int[]map) {
-        if (nameTable != null) {
-            for (NameEntry e : nameTable.values()) {
-                if (e.backNum > 1) {
-                    for (int i=0; i<e.backNum; i++) {
-                        e.backRefs[i] = map[e.backRefs[i]];
-                    }
-                } else if (e.backNum == 1) {
-                    e.backRef1 = map[e.backRef1];
-                }
-            }
-        }
-    }
-
-    public int numberOfNames() {
-        return nameTable == null ? 0 : nameTable.size();
-    }
-
-    void nameAdd(char[] name, int nameP, int nameEnd, int backRef, Syntax syntax) {
-        if (nameEnd - nameP <= 0) throw new ValueException(ErrorMessages.ERR_EMPTY_GROUP_NAME);
-
-        NameEntry e = null;
-        if (nameTable == null) {
-            nameTable = new HashMap<String,NameEntry>(); // 13, oni defaults to 5
-        } else {
-            e = nameFind(name, nameP, nameEnd);
-        }
-
-        if (e == null) {
-            // dup the name here as oni does ?, what for ? (it has to manage it, we don't)
-            e = new NameEntry(name, nameP, nameEnd);
-            nameTable.put(new String(name, nameP, nameEnd - nameP), e);
-        } else if (e.backNum >= 1 && !syntax.allowMultiplexDefinitionName()) {
-            throw new ValueException(ErrorMessages.ERR_MULTIPLEX_DEFINED_NAME, new String(name, nameP, nameEnd - nameP));
-        }
-
-        e.addBackref(backRef);
-    }
-
-    NameEntry nameToGroupNumbers(char[] name, int nameP, int nameEnd) {
-        return nameFind(name, nameP, nameEnd);
-    }
-
-    public int nameToBackrefNumber(char[] name, int nameP, int nameEnd, Region region) {
-        NameEntry e = nameToGroupNumbers(name, nameP, nameEnd);
-        if (e == null) throw new ValueException(ErrorMessages.ERR_UNDEFINED_NAME_REFERENCE,
-                                                new String(name, nameP, nameEnd - nameP));
-
-        switch(e.backNum) {
-        case 0:
-            throw new InternalException(ErrorMessages.ERR_PARSER_BUG);
-        case 1:
-            return e.backRef1;
-        default:
-            if (region != null) {
-                for (int i = e.backNum - 1; i >= 0; i--) {
-                    if (region.beg[e.backRefs[i]] != Region.REGION_NOTPOS) return e.backRefs[i];
-                }
-            }
-            return e.backRefs[e.backNum - 1];
-        }
-    }
-
-    public Iterator<NameEntry> namedBackrefIterator() {
-        return nameTable.values().iterator();
-    }
-
-    public boolean noNameGroupIsActive(Syntax syntax) {
-        if (isDontCaptureGroup(options)) return false;
-
-        if (Config.USE_NAMED_GROUP) {
-            if (numberOfNames() > 0 && syntax.captureOnlyNamedGroup() && !isCaptureGroup(options)) return false;
-        }
-        return true;
-    }
-
     /* set skip map for Boyer-Moor search */
     void setupBMSkipMap() {
         char[] chars = exact;
@@ -353,16 +246,6 @@ public final class Regex implements RegexState {
         exactP = exactEnd = 0;
     }
 
-    public String encStringToString(byte[]bytes, int p, int end) {
-        StringBuilder sb = new StringBuilder("\nPATTERN: /");
-
-        while (p < end) {
-            sb.append(new String(new byte[]{bytes[p]}));
-            p++;
-        }
-        return sb.append("/").toString();
-    }
-
     public String optimizeInfoToString() {
         String s = "";
         s += "optimize: " + searchAlgorithm.getName() + "\n";
@@ -410,19 +293,13 @@ public final class Regex implements RegexState {
         return options;
     }
 
-    public void setUserOptions(int options) {
-        this.userOptions = options;
-    }
-
-    public int getUserOptions() {
-        return userOptions;
+    public String dumpTree() {
+        return analyser == null ? null : analyser.root.toString();
     }
 
-    public void setUserObject(Object object) {
-        this.userObject = object;
+    public String dumpByteCode() {
+        compile();
+        return new ByteCodePrinter(this).byteCodeListToString();
     }
 
-    public Object getUserObject() {
-        return userObject;
-    }
 }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Region.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Region.java
index d685a249..ee9eb168 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Region.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Region.java
@@ -25,7 +25,6 @@ public final class Region {
     public final int numRegs;
     public final int[]beg;
     public final int[]end;
-    public CaptureTreeNode historyRoot;
 
     public Region(int num) {
         this.numRegs = num;
@@ -33,20 +32,6 @@ public final class Region {
         this.end = new int[num];
     }
 
-    public Region(int begin, int end) {
-        this.numRegs = 1;
-        this.beg = new int[]{begin};
-        this.end = new int[]{end};
-    }
-
-    public Region clone() {
-        Region region = new Region(numRegs);
-        System.arraycopy(beg, 0, region.beg, 0, beg.length);
-        System.arraycopy(end, 0, region.end, 0, end.length);
-        if (historyRoot != null) region.historyRoot = historyRoot.cloneTree();
-        return region;
-    }
-
     public String toString() {
         StringBuilder sb = new StringBuilder();
         sb.append("Region: \n");
@@ -54,10 +39,6 @@ public final class Region {
         return sb.toString();
     }
 
-    CaptureTreeNode getCaptureTree() {
-        return historyRoot;
-    }
-
     void clear() {
         for (int i=0; i<beg.length; i++) {
             beg[i] = end[i] = REGION_NOTPOS;
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ScanEnvironment.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ScanEnvironment.java
index a604bfa2..dd65939d 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ScanEnvironment.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ScanEnvironment.java
@@ -40,16 +40,10 @@ public final class ScanEnvironment {
     final public Regex reg;
 
     int numCall;
-    UnsetAddrList unsetAddrList; // USE_SUBEXP_CALL
     public int numMem;
 
-    int numNamed; // USE_NAMED_GROUP
-
     public Node memNodes[];
 
-    // USE_COMBINATION_EXPLOSION_CHECK
-    int numCombExpCheck;
-    int combExpMaxRegNum;
     int currMaxRegNum;
     boolean hasRecursion;
 
@@ -69,12 +63,8 @@ public final class ScanEnvironment {
         numCall = 0;
         numMem = 0;
 
-        numNamed = 0;
-
         memNodes = null;
 
-        numCombExpCheck = 0;
-        combExpMaxRegNum = 0;
         currMaxRegNum = 0;
         hasRecursion = false;
     }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ScannerSupport.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ScannerSupport.java
index f3d8165c..abe51be2 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ScannerSupport.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ScannerSupport.java
@@ -37,6 +37,8 @@ abstract class ScannerSupport extends IntHolder implements ErrorMessages {
     private final int end;              // pattern end position for reset() support
     protected int _p;                   // used by mark()/restore() to mark positions
 
+    private final static int INT_SIGN_BIT = 1 << 31;
+
     protected ScannerSupport(char[] chars, int p, int end) {
         this.chars = chars;
         this.begin = p;
@@ -53,8 +55,6 @@ abstract class ScannerSupport extends IntHolder implements ErrorMessages {
         return end;
     }
 
-    private final int INT_SIGN_BIT = 1 << 31;
-
     protected final int scanUnsignedNumber() {
         int last = c;
         int num = 0; // long ???
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/StackMachine.java b/src/jdk/nashorn/internal/runtime/regexp/joni/StackMachine.java
index 898a4f10..eb6fb7d4 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/StackMachine.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/StackMachine.java
@@ -22,7 +22,6 @@ package jdk.nashorn.internal.runtime.regexp.joni;
 import static jdk.nashorn.internal.runtime.regexp.joni.BitStatus.bsAt;
 
 import java.lang.ref.WeakReference;
-import java.util.Arrays;
 
 import jdk.nashorn.internal.runtime.regexp.joni.constants.StackPopLevel;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.StackType;
@@ -36,10 +35,6 @@ abstract class StackMachine extends Matcher implements StackType {
     protected final int[]repeatStk;
     protected final int memStartStk, memEndStk;
 
-    // CEC
-    protected byte[] stateCheckBuff; // move to int[] ?
-    int stateCheckBuffSize;
-
     protected StackMachine(Regex regex, char[] chars, int p , int end) {
         super(regex, chars, p, end);
 
@@ -104,67 +99,12 @@ abstract class StackMachine extends Matcher implements StackType {
         stk++;
     }
 
-    // CEC
-
-    // STATE_CHECK_POS
-    private int stateCheckPos(int s, int snum) {
-        return (s - str) * regex.numCombExpCheck + (snum - 1);
-    }
-
-    // STATE_CHECK_VAL
-    protected final boolean stateCheckVal(int s, int snum) {
-        if (stateCheckBuff != null) {
-            int x = stateCheckPos(s, snum);
-            return (stateCheckBuff[x / 8] & (1 << (x % 8))) != 0;
-        }
-        return false;
-    }
-
-    // ELSE_IF_STATE_CHECK_MARK
-    private void stateCheckMark() {
-        StackEntry e = stack[stk];
-        int x = stateCheckPos(e.getStatePStr(), e.getStateCheck());
-        stateCheckBuff[x / 8] |= (1 << (x % 8));
-    }
-
-    // STATE_CHECK_BUFF_INIT
-    private static final int STATE_CHECK_BUFF_MALLOC_THRESHOLD_SIZE = 16;
-    protected final void stateCheckBuffInit(int strLength, int offset, int stateNum) {
-        if (stateNum > 0 && strLength >= Config.CHECK_STRING_THRESHOLD_LEN) {
-            int size = ((strLength + 1) * stateNum + 7) >>> 3;
-            offset = (offset * stateNum) >>> 3;
-
-            if (size > 0 && offset < size && size < Config.CHECK_BUFF_MAX_SIZE) {
-                if (size >= STATE_CHECK_BUFF_MALLOC_THRESHOLD_SIZE) {
-                    stateCheckBuff = new byte[size];
-                } else {
-                    // same impl, reduce...
-                    stateCheckBuff = new byte[size];
-                }
-                Arrays.fill(stateCheckBuff, offset, (size - offset), (byte)0);
-                stateCheckBuffSize = size;
-            } else {
-                stateCheckBuff = null; // reduce
-                stateCheckBuffSize = 0;
-            }
-        } else {
-            stateCheckBuff = null; // reduce
-            stateCheckBuffSize = 0;
-        }
-    }
-
-    protected final void stateCheckBuffClear() {
-        stateCheckBuff = null;
-        stateCheckBuffSize = 0;
-    }
-
     private void push(int type, int pat, int s, int prev) {
         StackEntry e = ensure1();
         e.type = type;
         e.setStatePCode(pat);
         e.setStatePStr(s);
         e.setStatePStrPrev(prev);
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) e.setStateCheck(0);
         stk++;
     }
 
@@ -172,30 +112,9 @@ abstract class StackMachine extends Matcher implements StackType {
         StackEntry e = stack[stk];
         e.type = type;
         e.setStatePCode(pat);
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) e.setStateCheck(0);
         stk++;
     }
 
-    protected final void pushAltWithStateCheck(int pat, int s, int sprev, int snum) {
-        StackEntry e = ensure1();
-        e.type = ALT;
-        e.setStatePCode(pat);
-        e.setStatePStr(s);
-        e.setStatePStrPrev(sprev);
-        if (Config.USE_COMBINATION_EXPLOSION_CHECK) e.setStateCheck(stateCheckBuff != null ? snum : 0);
-        stk++;
-    }
-
-    protected final void pushStateCheck(int s, int snum) {
-        if (stateCheckBuff != null) {
-            StackEntry e = ensure1();
-            e.type = STATE_CHECK_MARK;
-            e.setStatePStr(s);
-            e.setStateCheck(snum);
-            stk++;
-        }
-    }
-
     protected final void pushAlt(int pat, int s, int prev) {
         push(ALT, pat, s, prev);
     }
@@ -294,19 +213,6 @@ abstract class StackMachine extends Matcher implements StackType {
         stk++;
     }
 
-    protected final void pushCallFrame(int pat) {
-        StackEntry e = ensure1();
-        e.type = CALL_FRAME;
-        e.setCallFrameRetAddr(pat);
-        stk++;
-    }
-
-    protected final void pushReturn() {
-        StackEntry e = ensure1();
-        e.type = RETURN;
-        stk++;
-    }
-
     // stack debug routines here
     // ...
 
@@ -331,8 +237,6 @@ abstract class StackMachine extends Matcher implements StackType {
 
             if ((e.type & MASK_POP_USED) != 0) {
                 return e;
-            } else if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-                if (e.type == STATE_CHECK_MARK) stateCheckMark();
             }
         }
     }
@@ -346,8 +250,6 @@ abstract class StackMachine extends Matcher implements StackType {
             } else if (e.type == MEM_START) {
                 repeatStk[memStartStk + e.getMemNum()] = e.getMemStart();
                 repeatStk[memEndStk + e.getMemNum()] = e.getMemEnd();
-            } else if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-                if (e.type == STATE_CHECK_MARK) stateCheckMark();
             }
         }
     }
@@ -368,8 +270,6 @@ abstract class StackMachine extends Matcher implements StackType {
             } else if (e.type == MEM_END) {
                 repeatStk[memStartStk + e.getMemNum()] = e.getMemStart();
                 repeatStk[memEndStk + e.getMemNum()] = e.getMemEnd();
-            } else if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-                if (e.type == STATE_CHECK_MARK) stateCheckMark();
             }
         }
     }
@@ -391,8 +291,6 @@ abstract class StackMachine extends Matcher implements StackType {
             } else if (e.type == MEM_END){
                 repeatStk[memStartStk + e.getMemNum()] = e.getMemStart();
                 repeatStk[memEndStk + e.getMemNum()] = e.getMemStart();
-            } else if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-                if (e.type == STATE_CHECK_MARK) stateCheckMark();
             }
         }
     }
@@ -414,8 +312,6 @@ abstract class StackMachine extends Matcher implements StackType {
             } else if (e.type == MEM_END) {
                 repeatStk[memStartStk + e.getMemNum()] = e.getMemStart();
                 repeatStk[memEndStk + e.getMemNum()] = e.getMemEnd();
-            } else if (Config.USE_COMBINATION_EXPLOSION_CHECK) {
-                if (e.type == STATE_CHECK_MARK) stateCheckMark();
             }
         }
     }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/Syntax.java b/src/jdk/nashorn/internal/runtime/regexp/joni/Syntax.java
index 07b52626..518a416e 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/Syntax.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/Syntax.java
@@ -609,7 +609,7 @@ public final class Syntax implements SyntaxProperties{
         OP_ESC_CONTROL_CHARS | OP_ESC_C_CONTROL | OP_ESC_X_HEX2)
         & ~OP_ESC_LTGT_WORD_BEGIN_END ),
 
-        ( OP2_QMARK_GROUP_EFFECT | OP2_CCLASS_SET_OP |
+        ( OP2_QMARK_GROUP_EFFECT |
         OP2_ESC_V_VTAB | OP2_ESC_U_HEX4 ),
 
         ( GNU_REGEX_BV | DIFFERENT_LEN_ALT_LOOK_BEHIND ),
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/UnsetAddrList.java b/src/jdk/nashorn/internal/runtime/regexp/joni/UnsetAddrList.java
deleted file mode 100644
index ca72e167..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/UnsetAddrList.java
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-import jdk.nashorn.internal.runtime.regexp.joni.ast.EncloseNode;
-import jdk.nashorn.internal.runtime.regexp.joni.ast.Node;
-import jdk.nashorn.internal.runtime.regexp.joni.exception.ErrorMessages;
-import jdk.nashorn.internal.runtime.regexp.joni.exception.InternalException;
-
-public final class UnsetAddrList {
-    int num;
-    Node[]targets;
-    int[]offsets;
-
-    public UnsetAddrList(int size) {
-        targets = new Node[size];
-        offsets = new int[size];
-    }
-
-    public void add(int offset, Node node) {
-        if (num >= offsets.length) {
-            Node []ttmp = new Node[targets.length << 1];
-            System.arraycopy(targets, 0, ttmp, 0, num);
-            targets = ttmp;
-            int[]otmp = new int[offsets.length << 1];
-            System.arraycopy(offsets, 0, otmp, 0, num);
-            offsets = otmp;
-        }
-        targets[num] = node;
-        offsets[num] = offset;
-
-        num++;
-    }
-
-    public void fix(Regex regex) {
-        for (int i=0; i<num; i++) {
-            EncloseNode en = (EncloseNode)targets[i];
-            if (!en.isAddrFixed()) new InternalException(ErrorMessages.ERR_PARSER_BUG);
-            regex.code[offsets[i]] = en.callAddr; // is this safe ?
-        }
-    }
-
-    public String toString() {
-        StringBuilder value = new StringBuilder();
-        if (num > 0) {
-            for (int i=0; i<num; i++) {
-                value.append("offset + " + offsets[i] + " target: " + targets[i].getAddressName());
-            }
-        }
-        return value.toString();
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CClassNode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CClassNode.java
index 4a73e266..f60c21a3 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CClassNode.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CClassNode.java
@@ -22,7 +22,6 @@ package jdk.nashorn.internal.runtime.regexp.joni.ast;
 import jdk.nashorn.internal.runtime.regexp.joni.*;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.CCSTATE;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.CCVALTYPE;
-import jdk.nashorn.internal.runtime.regexp.joni.encoding.AsciiTables;
 import jdk.nashorn.internal.runtime.regexp.joni.encoding.CharacterType;
 import jdk.nashorn.internal.runtime.regexp.joni.encoding.IntHolder;
 import jdk.nashorn.internal.runtime.regexp.joni.exception.ErrorMessages;
@@ -40,6 +39,41 @@ public final class CClassNode extends Node {
 
     private int ctype;                      // for hashing purposes
 
+    private final static short AsciiCtypeTable[] = {
+            0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
+            0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
+            0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
+            0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
+            0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
+            0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
+            0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
+            0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
+            0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
+            0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
+            0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
+            0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
+            0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
+            0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
+            0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
+            0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
+    };
+
     // node_new_cclass
     public CClassNode() {}
 
@@ -330,13 +364,13 @@ public final class CClassNode extends Node {
                 if (not) {
                     for (int c = 0; c < BitSet.SINGLE_BYTE_SIZE; c++) {
                         // if (!ASCIIEncoding.INSTANCE.isCodeCType(c, ctype)) bs.set(c);
-                        if ((AsciiTables.AsciiCtypeTable[c] & (1 << ctype)) == 0) bs.set(c);
+                        if ((AsciiCtypeTable[c] & (1 << ctype)) == 0) bs.set(c);
                     }
                     addAllMultiByteRange();
                 } else {
                     for (int c = 0; c < BitSet.SINGLE_BYTE_SIZE; c++) {
                         // if (ASCIIEncoding.INSTANCE.isCodeCType(c, ctype)) bs.set(c);
-                        if ((AsciiTables.AsciiCtypeTable[c] & (1 << ctype)) != 0) bs.set(c);
+                        if ((AsciiCtypeTable[c] & (1 << ctype)) != 0) bs.set(c);
                     }
                 }
                 return;
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CTypeNode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CTypeNode.java
deleted file mode 100644
index b03f9900..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CTypeNode.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni.ast;
-
-public final class CTypeNode extends Node {
-    public int ctype;
-    public boolean not;
-
-    public CTypeNode(int type, boolean not) {
-        this.ctype= type;
-        this.not = not;
-    }
-
-    @Override
-    public int getType() {
-        return CTYPE;
-    }
-
-    @Override
-    public String getName() {
-        return "Character Type";
-    }
-
-    @Override
-    public String toString(int level) {
-        StringBuilder value = new StringBuilder();
-        value.append("\n  ctype: " + ctype);
-        value.append("\n  not: " + not);
-
-        return value.toString();
-    }
-
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CallNode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CallNode.java
deleted file mode 100644
index 361471b5..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/CallNode.java
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni.ast;
-
-import java.util.Set;
-
-import jdk.nashorn.internal.runtime.regexp.joni.UnsetAddrList;
-import jdk.nashorn.internal.runtime.regexp.joni.WarnCallback;
-
-public final class CallNode extends StateNode {
-    public char[] name;
-    public int nameP;
-    public int nameEnd;
-
-    public int groupNum;
-    public Node target;             // is it an EncloseNode always ?
-    public UnsetAddrList unsetAddrList;
-
-    public CallNode(char[] name, int nameP, int nameEnd, int gnum) {
-        this.name = name;
-        this.nameP = nameP;
-        this.nameEnd = nameEnd;
-        this.groupNum = gnum; /* call by number if gnum != 0 */
-    }
-
-    @Override
-    public int getType() {
-        return CALL;
-    }
-
-    @Override
-    protected void setChild(Node newChild) {
-        target = newChild;
-    }
-
-    @Override
-    protected Node getChild() {
-        return target;
-    }
-
-    public void setTarget(Node tgt) {
-        target = tgt;
-        tgt.parent = this;
-    }
-
-    @Override
-    public String getName() {
-        return "Call";
-    }
-
-    @Override
-    public void verifyTree(Set<Node> set, WarnCallback warnings) {
-        if (target == null || target.parent == this)
-            warnings.warn(this.getAddressName() + " doesn't point to a target or the target has been stolen");
-        // do not recurse here
-    }
-
-    @Override
-    public String toString(int level) {
-        StringBuilder value = new StringBuilder(super.toString(level));
-        value.append("\n  name: " + new String(name, nameP, nameEnd - nameP));
-        value.append("\n  groupNum: " + groupNum);
-        value.append("\n  target: " + pad(target.getAddressName(), level + 1));
-        value.append("\n  unsetAddrList: " + pad(unsetAddrList, level + 1));
-
-        return value.toString();
-    }
-
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/EncloseNode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/EncloseNode.java
index a60afb1d..1c5bfe7d 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/EncloseNode.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/EncloseNode.java
@@ -25,7 +25,7 @@ import jdk.nashorn.internal.runtime.regexp.joni.constants.EncloseType;
 
 public final class EncloseNode extends StateNode implements EncloseType {
 
-    public int type;                // enclose type
+    public final int type;                // enclose type
     public int regNum;
     public int option;
     public Node target;             /* EncloseNode : ENCLOSE_MEMORY */
@@ -42,10 +42,8 @@ public final class EncloseNode extends StateNode implements EncloseType {
     }
 
     // node_new_enclose_memory
-    public EncloseNode(int option, boolean isNamed) {
+    public EncloseNode() {
         this(MEMORY);
-        if (isNamed) setNamedGroup();
-        if (Config.USE_SUBEXP_CALL) this.option = option;
     }
 
     // node_new_option
@@ -104,46 +102,14 @@ public final class EncloseNode extends StateNode implements EncloseType {
         return types.toString();
     }
 
-    public void setEncloseStatus(int flag) {
-        state |= flag;
-    }
-
-    public void clearEncloseStatus(int flag) {
-        state &= ~flag;
-    }
-
-    public void clearMemory() {
-        type &= ~MEMORY;
-    }
-
-    public void setMemory() {
-        type |= MEMORY;
-    }
-
     public boolean isMemory() {
         return (type & MEMORY) != 0;
     }
 
-    public void clearOption() {
-        type &= ~OPTION;
-    }
-
-    public void setOption() {
-        type |= OPTION;
-    }
-
     public boolean isOption() {
         return (type & OPTION) != 0;
     }
 
-    public void clearStopBacktrack() {
-        type &= ~STOP_BACKTRACK;
-    }
-
-    public void setStopBacktrack() {
-        type |= STOP_BACKTRACK;
-    }
-
     public boolean isStopBacktrack() {
         return (type & STOP_BACKTRACK) != 0;
     }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/QuantifierNode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/QuantifierNode.java
index 26cde985..c87de29d 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/QuantifierNode.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/QuantifierNode.java
@@ -21,9 +21,10 @@ package jdk.nashorn.internal.runtime.regexp.joni.ast;
 
 import jdk.nashorn.internal.runtime.regexp.joni.Config;
 import jdk.nashorn.internal.runtime.regexp.joni.ScanEnvironment;
-import jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce;
 import jdk.nashorn.internal.runtime.regexp.joni.constants.TargetInfo;
 
+import static jdk.nashorn.internal.runtime.regexp.joni.ast.QuantifierNode.ReduceType.*;
+
 public final class QuantifierNode extends StateNode {
 
     public Node target;
@@ -37,8 +38,33 @@ public final class QuantifierNode extends StateNode {
     public Node nextHeadExact;
     public boolean isRefered;           /* include called node. don't eliminate even if {0} */
 
-    // USE_COMBINATION_EXPLOSION_CHECK
-    public int  combExpCheckNum;        /* 1,2,3...: check,  0: no check  */
+    enum ReduceType {
+        ASIS,       /* as is */
+        DEL,        /* delete parent */
+        A,          /* to '*'    */
+        AQ,         /* to '*?'   */
+        QQ,         /* to '??'   */
+        P_QQ,       /* to '+)??' */
+        PQ_Q,       /* to '+?)?' */
+    }
+
+    private final static ReduceType[][] REDUCE_TABLE = {
+            {DEL,     A,      A,      QQ,     AQ,     ASIS}, /* '?'  */
+            {DEL,     DEL,    DEL,    P_QQ,   P_QQ,   DEL},  /* '*'  */
+            {A,       A,      DEL,    ASIS,   P_QQ,   DEL},  /* '+'  */
+            {DEL,     AQ,     AQ,     DEL,    AQ,     AQ},   /* '??' */
+            {DEL,     DEL,    DEL,    DEL,    DEL,    DEL},  /* '*?' */
+            {ASIS,    PQ_Q,   DEL,    AQ,     AQ,     DEL}   /* '+?' */
+    };
+
+    private final static String PopularQStr[] = new String[] {
+            "?", "*", "+", "??", "*?", "+?"
+    };
+
+    private final static String ReduceQStr[]= new String[] {
+            "", "", "*", "*?", "??", "+ and ??", "+? and ?"
+    };
+
 
     public QuantifierNode(int lower, int upper, boolean byNumber) {
         this.lower = lower;
@@ -92,7 +118,6 @@ public final class QuantifierNode extends StateNode {
         value.append("\n  headExact: " + pad(headExact, level + 1));
         value.append("\n  nextHeadExact: " + pad(nextHeadExact, level + 1));
         value.append("\n  isRefered: " + isRefered);
-        value.append("\n  combExpCheckNum: " + combExpCheckNum);
 
         return value.toString();
     }
@@ -134,7 +159,6 @@ public final class QuantifierNode extends StateNode {
         headExact = other.headExact;
         nextHeadExact = other.nextHeadExact;
         isRefered = other.isRefered;
-        combExpCheckNum = other.combExpCheckNum;
     }
 
     public void reduceNestedQuantifier(QuantifierNode other) {
@@ -143,7 +167,7 @@ public final class QuantifierNode extends StateNode {
 
         if (pnum < 0 || cnum < 0) return;
 
-        switch(Reduce.REDUCE_TABLE[cnum][pnum]) {
+        switch(REDUCE_TABLE[cnum][pnum]) {
         case DEL:
             // no need to set the parent here...
             // swap ?
@@ -226,7 +250,7 @@ public final class QuantifierNode extends StateNode {
 
             if (Config.USE_WARNING_REDUNDANT_NESTED_REPEAT_OPERATOR) {
                 if (!isByNumber() && !qnt.isByNumber() && env.syntax.warnReduntantNestedRepeat()) {
-                    switch(Reduce.REDUCE_TABLE[targetQNum][nestQNum]) {
+                    switch(REDUCE_TABLE[targetQNum][nestQNum]) {
                     case ASIS:
                         break;
 
@@ -237,9 +261,9 @@ public final class QuantifierNode extends StateNode {
 
                     default:
                         env.reg.getWarnings().warn(new String(chars, p, end) +
-                                " nested repeat operator " + Reduce.PopularQStr[targetQNum] +
-                                " and " + Reduce.PopularQStr[nestQNum] + " was replaced with '" +
-                                Reduce.ReduceQStr[Reduce.REDUCE_TABLE[targetQNum][nestQNum].ordinal()] + "'");
+                                " nested repeat operator " + PopularQStr[targetQNum] +
+                                " and " + PopularQStr[nestQNum] + " was replaced with '" +
+                                ReduceQStr[REDUCE_TABLE[targetQNum][nestQNum].ordinal()] + "'");
                     }
                 }
             } // USE_WARNING_REDUNDANT_NESTED_REPEAT_OPERATOR
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/StateNode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/StateNode.java
index 18101a4a..3f75f863 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/ast/StateNode.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/ast/StateNode.java
@@ -40,7 +40,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         if (isRecursion()) states.append("RECURSION ");
         if (isCalled()) states.append("CALLED ");
         if (isAddrFixed()) states.append("ADDR_FIXED ");
-        if (isNamedGroup()) states.append("NAMED_GROUP ");
         if (isNameRef()) states.append("NAME_REF ");
         if (isInRepeat()) states.append("IN_REPEAT ");
         if (isNestLevel()) states.append("NEST_LEVEL ");
@@ -57,10 +56,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_MIN_FIXED;
     }
 
-    public void clearMinFixed() {
-        state &= ~NST_MIN_FIXED;
-    }
-
     public boolean isMaxFixed() {
         return (state & NST_MAX_FIXED) != 0;
     }
@@ -69,10 +64,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_MAX_FIXED;
     }
 
-    public void clearMaxFixed() {
-        state &= ~NST_MAX_FIXED;
-    }
-
     public boolean isCLenFixed() {
         return (state & NST_CLEN_FIXED) != 0;
     }
@@ -81,10 +72,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_CLEN_FIXED;
     }
 
-    public void clearCLenFixed() {
-        state &= ~NST_CLEN_FIXED;
-    }
-
     public boolean isMark1() {
         return (state & NST_MARK1) != 0;
     }
@@ -93,10 +80,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_MARK1;
     }
 
-    public void clearMark1() {
-        state &= ~NST_MARK1;
-    }
-
     public boolean isMark2() {
         return (state & NST_MARK2) != 0;
     }
@@ -117,10 +100,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_MEM_BACKREFED;
     }
 
-    public void clearMemBackrefed() {
-        state &= ~NST_MEM_BACKREFED;
-    }
-
     public boolean isStopBtSimpleRepeat() {
         return (state & NST_STOP_BT_SIMPLE_REPEAT) != 0;
     }
@@ -129,10 +108,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_STOP_BT_SIMPLE_REPEAT;
     }
 
-    public void clearStopBtSimpleRepeat() {
-        state &= ~NST_STOP_BT_SIMPLE_REPEAT;
-    }
-
     public boolean isRecursion() {
         return (state & NST_RECURSION) != 0;
     }
@@ -141,10 +116,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_RECURSION;
     }
 
-    public void clearRecursion() {
-        state &= ~NST_RECURSION;
-    }
-
     public boolean isCalled() {
         return (state & NST_CALLED) != 0;
     }
@@ -153,10 +124,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_CALLED;
     }
 
-    public void clearCAlled() {
-        state &= ~NST_CALLED;
-    }
-
     public boolean isAddrFixed() {
         return (state & NST_ADDR_FIXED) != 0;
     }
@@ -165,22 +132,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_ADDR_FIXED;
     }
 
-    public void clearAddrFixed() {
-        state &= ~NST_ADDR_FIXED;
-    }
-
-    public boolean isNamedGroup() {
-        return (state & NST_NAMED_GROUP) != 0;
-    }
-
-    public void setNamedGroup() {
-        state |= NST_NAMED_GROUP;
-    }
-
-    public void clearNamedGroup() {
-        state &= ~NST_NAMED_GROUP;
-    }
-
     public boolean isNameRef() {
         return (state & NST_NAME_REF) != 0;
     }
@@ -189,10 +140,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_NAME_REF;
     }
 
-    public void clearNameRef() {
-        state &= ~NST_NAME_REF;
-    }
-
     public boolean isInRepeat() {
         return (state & NST_IN_REPEAT) != 0;
     }
@@ -201,10 +148,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_IN_REPEAT;
     }
 
-    public void clearInRepeat() {
-        state &= ~NST_IN_REPEAT;
-    }
-
     public boolean isNestLevel() {
         return (state & NST_NEST_LEVEL) != 0;
     }
@@ -213,10 +156,6 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_NEST_LEVEL;
     }
 
-    public void clearNestLevel() {
-        state &= ~NST_NEST_LEVEL;
-    }
-
     public boolean isByNumber() {
         return (state & NST_BY_NUMBER) != 0;
     }
@@ -225,8 +164,4 @@ public abstract class StateNode extends Node implements NodeStatus {
         state |= NST_BY_NUMBER;
     }
 
-    public void clearByNumber() {
-        state &= ~NST_BY_NUMBER;
-    }
-
 }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/AbstractBench.java b/src/jdk/nashorn/internal/runtime/regexp/joni/bench/AbstractBench.java
deleted file mode 100644
index 9751b51d..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/AbstractBench.java
+++ /dev/null
@@ -1,49 +0,0 @@
-package jdk.nashorn.internal.runtime.regexp.joni.bench;
-
-import jdk.nashorn.internal.runtime.regexp.joni.Option;
-import jdk.nashorn.internal.runtime.regexp.joni.Regex;
-import jdk.nashorn.internal.runtime.regexp.joni.Syntax;
-
-public abstract class AbstractBench {
-    protected void bench(String _reg, String _str, int warmup, int times) throws Exception {
-        char[] reg = _reg.toCharArray();
-        char[] str = _str.toCharArray();
-
-        Regex p = new Regex(reg,0,reg.length,Option.DEFAULT,Syntax.DEFAULT);
-
-        System.err.println("::: /" + _reg + "/ =~ \"" + _str + "\", " + warmup + " * " + times + " times");
-
-        for(int j=0;j<warmup;j++) {
-            long before = System.currentTimeMillis();
-            for(int i = 0; i < times; i++) {
-                p.matcher(str, 0, str.length).search(0, str.length, Option.NONE);
-            }
-            long time = System.currentTimeMillis() - before;
-            System.err.println(":  " + time + "ms");
-        }
-    }
-
-    protected void benchBestOf(String _reg, String _str, int warmup, int times) throws Exception {
-        char[] reg = _reg.toCharArray();
-        char[] str = _str.toCharArray();
-
-        Regex p = new Regex(reg,0,reg.length,Option.DEFAULT,Syntax.DEFAULT);
-
-        System.err.println("::: /" + _reg + "/ =~ \"" + _str + "\", " + warmup + " * " + times + " times");
-
-        long best = Long.MAX_VALUE;
-
-        for(int j=0;j<warmup;j++) {
-            long before = System.currentTimeMillis();
-            for(int i = 0; i < times; i++) {
-                p.matcher(str, 0, str.length).search(0, str.length, Option.NONE);
-            }
-            long time = System.currentTimeMillis() - before;
-            if(time < best) {
-                best = time;
-            }
-            System.err.print(".");
-        }
-        System.err.println(":  " + best + "ms");
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchGreedyBacktrack.java b/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchGreedyBacktrack.java
deleted file mode 100644
index 116352da..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchGreedyBacktrack.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package jdk.nashorn.internal.runtime.regexp.joni.bench;
-
-public class BenchGreedyBacktrack extends AbstractBench {
-    public static void main(String[] args) throws Exception {
-        new BenchGreedyBacktrack().bench(".*_p","_petstore_session_id=1b341ffe23b5298676d535fcabd3d0d7; path=/",10,1000000);
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchRailsRegs.java b/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchRailsRegs.java
deleted file mode 100644
index eb339af3..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchRailsRegs.java
+++ /dev/null
@@ -1,31 +0,0 @@
-package jdk.nashorn.internal.runtime.regexp.joni.bench;
-
-public class BenchRailsRegs extends AbstractBench {
-    public static void main(String[] args) throws Exception {
-        final String[][] regexps = {{"a.*?[b-z]{2,4}aaaaaa","afdgdsgderaabxxaaaaaaaaaaaaaaaaaaaaaaaa"},
-                                    {"://","/shop/viewCategory.shtml?category=DOGS"},
-                                    {"^\\w+\\://[^/]+(/.*|$)$","/shop/viewCategory.shtml?category=DOGS"},
-                                    {"\\A/?\\Z","/shop/viewCategory.shtml"},
-                                    {"\\A/shop/signonForm\\.shtml/?\\Z","/shop/viewCategory.shtml"},
-                                    {"\\A/shop/newAccountForm\\.shtml/?\\Z","/shop/viewCategory.shtml"},
-                                    {"\\A/shop/newAccount\\.shtml/?\\Z","/shop/viewCategory.shtml"},
-                                    {"\\A/shop/viewCart\\.shtml/?\\Z","/shop/viewCategory.shtml"},
-                                    {"\\A/shop/index\\.shtml/?\\Z","/shop/viewCategory.shtml"},
-                                    {"\\A/shop/viewCategory\\.shtml/?\\Z","/shop/viewCategory.shtml"},
-                                    {"\\A(?:::)?([A-Z]\\w*(?:::[A-Z]\\w*)*)\\z","CategoriesController"},
-                                    {"\\Ainsert","SELECT * FROM sessions WHERE (session_id = '1b341ffe23b5298676d535fcabd3d0d7')  LIMIT 1"},
-                                    {"\\A\\(?\\s*(select|show)","SELECT * FROM sessions WHERE (session_id = '1b341ffe23b5298676d535fcabd3d0d7')  LIMIT 1"},
-                                    {".*?\n","1b341ffe23b5298676d535fcabd3d0d7"},
-                                    {"^find_(all_by|by)_([_a-zA-Z]\\w*)$","find_by_string_id"},
-                                    {"\\.rjs$","categories/show.rhtml"},
-                                    {"^[-a-z]+://","petstore.css"},
-                                    {"^get$",""},
-                                    {"^post$",""},
-                                    {"^[^:]+","www.example.com"},
-                                    {"(=|\\?|_before_type_cast)$", "updated_on"},
-                                    {"^(.*?)=(.*?);","_petstore_session_id=1b341ffe23b5298676d535fcabd3d0d7; path=/"}};
-        for(String[] reg : regexps) {
-            new BenchRailsRegs().benchBestOf(reg[0],reg[1],10,1000000);
-        }
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchSeveralRegexps.java b/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchSeveralRegexps.java
deleted file mode 100644
index 3c118cfe..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/bench/BenchSeveralRegexps.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package jdk.nashorn.internal.runtime.regexp.joni.bench;
-
-public class BenchSeveralRegexps extends AbstractBench {
-    public static void main(String[] args) throws Exception {
-        int BASE = 1000000;
-
-        new BenchSeveralRegexps().benchBestOf("a"," a",10,4*BASE);
-
-        new BenchSeveralRegexps().benchBestOf(".*?=","_petstore_session_id=1b341ffe23b5298676d535fcabd3d0d7; path=/",10,BASE);
-
-        new BenchSeveralRegexps().benchBestOf("^(.*?)=(.*?);","_petstore_session_id=1b341ffe23b5298676d535fcabd3d0d7; path=/",10,BASE);
-
-        new BenchSeveralRegexps().benchBestOf(".*_p","_petstore_session_id=1b341ffe23b5298676d535fcabd3d0d7; path=/",10,4*BASE);
-
-        new BenchSeveralRegexps().benchBestOf(".*=","_petstore_session_id=1b341ffe23b5298676d535fcabd3d0d7; path=/",10,4*BASE);
-    }
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/constants/OPCode.java b/src/jdk/nashorn/internal/runtime/regexp/joni/constants/OPCode.java
index 7f2c534b..06c50117 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/constants/OPCode.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/constants/OPCode.java
@@ -19,8 +19,6 @@
  */
 package jdk.nashorn.internal.runtime.regexp.joni.constants;
 
-import jdk.nashorn.internal.runtime.regexp.joni.Config;
-
 public interface OPCode {
     final int FINISH                        = 0;            /* matching process terminator (no more alternative) */
     final int END                           = 1;            /* pattern code terminator (success end) */
@@ -151,237 +149,4 @@ public interface OPCode {
     final int EXACT1_IC_SB                  = 105;           /* single byte, N = 1, ignore case */
     final int EXACTN_IC_SB                  = 106;           /* single byte,        ignore case */
 
-
-    public final String OpCodeNames[] = Config.DEBUG_COMPILE ? new String[] {
-        "finish", /*OP_FINISH*/
-        "end", /*OP_END*/
-        "exact1", /*OP_EXACT1*/
-        "exact2", /*OP_EXACT2*/
-        "exact3", /*OP_EXACT3*/
-        "exact4", /*OP_EXACT4*/
-        "exact5", /*OP_EXACT5*/
-        "exactn", /*OP_EXACTN*/
-        "exactmb2-n1", /*OP_EXACTMB2N1*/
-        "exactmb2-n2", /*OP_EXACTMB2N2*/
-        "exactmb2-n3", /*OP_EXACTMB2N3*/
-        "exactmb2-n", /*OP_EXACTMB2N*/
-        "exactmb3n", /*OP_EXACTMB3N*/
-        "exactmbn", /*OP_EXACTMBN*/
-        "exact1-ic", /*OP_EXACT1_IC*/
-        "exactn-ic", /*OP_EXACTN_IC*/
-        "cclass", /*OP_CCLASS*/
-        "cclass-mb", /*OP_CCLASS_MB*/
-        "cclass-mix", /*OP_CCLASS_MIX*/
-        "cclass-not", /*OP_CCLASS_NOT*/
-        "cclass-mb-not", /*OP_CCLASS_MB_NOT*/
-        "cclass-mix-not", /*OP_CCLASS_MIX_NOT*/
-        "cclass-node", /*OP_CCLASS_NODE*/
-        "anychar", /*OP_ANYCHAR*/
-        "anychar-ml", /*OP_ANYCHAR_ML*/
-        "anychar*", /*OP_ANYCHAR_STAR*/
-        "anychar-ml*", /*OP_ANYCHAR_ML_STAR*/
-        "anychar*-peek-next", /*OP_ANYCHAR_STAR_PEEK_NEXT*/
-        "anychar-ml*-peek-next", /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
-        "word", /*OP_WORD*/
-        "not-word", /*OP_NOT_WORD*/
-        "word-bound", /*OP_WORD_BOUND*/
-        "not-word-bound", /*OP_NOT_WORD_BOUND*/
-        "word-begin", /*OP_WORD_BEGIN*/
-        "word-end", /*OP_WORD_END*/
-        "begin-buf", /*OP_BEGIN_BUF*/
-        "end-buf", /*OP_END_BUF*/
-        "begin-line", /*OP_BEGIN_LINE*/
-        "end-line", /*OP_END_LINE*/
-        "semi-end-buf", /*OP_SEMI_END_BUF*/
-        "begin-position", /*OP_BEGIN_POSITION*/
-        "backref1", /*OP_BACKREF1*/
-        "backref2", /*OP_BACKREF2*/
-        "backrefn", /*OP_BACKREFN*/
-        "backrefn-ic", /*OP_BACKREFN_IC*/
-        "backref_multi", /*OP_BACKREF_MULTI*/
-        "backref_multi-ic", /*OP_BACKREF_MULTI_IC*/
-        "backref_at_level", /*OP_BACKREF_AT_LEVEL*/
-        "mem-start", /*OP_MEMORY_START*/
-        "mem-start-push", /*OP_MEMORY_START_PUSH*/
-        "mem-end-push", /*OP_MEMORY_END_PUSH*/
-        "mem-end-push-rec", /*OP_MEMORY_END_PUSH_REC*/
-        "mem-end", /*OP_MEMORY_END*/
-        "mem-end-rec", /*OP_MEMORY_END_REC*/
-        "fail", /*OP_FAIL*/
-        "jump", /*OP_JUMP*/
-        "push", /*OP_PUSH*/
-        "pop", /*OP_POP*/
-        "push-or-jump-e1", /*OP_PUSH_OR_JUMP_EXACT1*/
-        "push-if-peek-next", /*OP_PUSH_IF_PEEK_NEXT*/
-        "repeat", /*OP_REPEAT*/
-        "repeat-ng", /*OP_REPEAT_NG*/
-        "repeat-inc", /*OP_REPEAT_INC*/
-        "repeat-inc-ng", /*OP_REPEAT_INC_NG*/
-        "repeat-inc-sg", /*OP_REPEAT_INC_SG*/
-        "repeat-inc-ng-sg", /*OP_REPEAT_INC_NG_SG*/
-        "null-check-start", /*OP_NULL_CHECK_START*/
-        "null-check-end", /*OP_NULL_CHECK_END*/
-        "null-check-end-memst", /*OP_NULL_CHECK_END_MEMST*/
-        "null-check-end-memst-push", /*OP_NULL_CHECK_END_MEMST_PUSH*/
-        "push-pos", /*OP_PUSH_POS*/
-        "pop-pos", /*OP_POP_POS*/
-        "push-pos-not", /*OP_PUSH_POS_NOT*/
-        "fail-pos", /*OP_FAIL_POS*/
-        "push-stop-bt", /*OP_PUSH_STOP_BT*/
-        "pop-stop-bt", /*OP_POP_STOP_BT*/
-        "look-behind", /*OP_LOOK_BEHIND*/
-        "push-look-behind-not", /*OP_PUSH_LOOK_BEHIND_NOT*/
-        "fail-look-behind-not", /*OP_FAIL_LOOK_BEHIND_NOT*/
-        "call", /*OP_CALL*/
-        "return", /*OP_RETURN*/
-        "state-check-push", /*OP_STATE_CHECK_PUSH*/
-        "state-check-push-or-jump", /*OP_STATE_CHECK_PUSH_OR_JUMP*/
-        "state-check", /*OP_STATE_CHECK*/
-        "state-check-anychar*", /*OP_STATE_CHECK_ANYCHAR_STAR*/
-        "state-check-anychar-ml*", /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
-        "set-option-push", /*OP_SET_OPTION_PUSH*/
-        "set-option", /*OP_SET_OPTION*/
-
-        // single byte versions
-        "anychar-sb", /*OP_ANYCHAR*/
-        "anychar-ml-sb", /*OP_ANYCHAR_ML*/
-        "anychar*-sb", /*OP_ANYCHAR_STAR*/
-        "anychar-ml*-sb", /*OP_ANYCHAR_ML_STAR*/
-        "anychar*-peek-next-sb", /*OP_ANYCHAR_STAR_PEEK_NEXT*/
-        "anychar-ml*-peek-next-sb", /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
-        "state-check-anychar*-sb", /*OP_STATE_CHECK_ANYCHAR_STAR*/
-        "state-check-anychar-ml*-sb", /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
-
-        "cclass-sb", /*OP_CCLASS*/
-        "cclass-not-sb", /*OP_CCLASS_NOT*/
-
-        "word-sb", /*OP_WORD*/
-        "not-word-sb", /*OP_NOT_WORD*/
-        "word-bound-sb", /*OP_WORD_BOUND*/
-        "not-word-bound-sb", /*OP_NOT_WORD_BOUND*/
-        "word-begin-sb", /*OP_WORD_BEGIN*/
-        "word-end-sb", /*OP_WORD_END*/
-
-        "look-behind-sb", /*OP_LOOK_BEHIND*/
-
-        "exact1-ic-sb", /*OP_EXACT1_IC*/
-        "exactn-ic-sb", /*OP_EXACTN_IC*/
-
-    } : null;
-
-    public final int OpCodeArgTypes[] = Config.DEBUG_COMPILE ? new int[] {
-        Arguments.NON, /*OP_FINISH*/
-        Arguments.NON, /*OP_END*/
-        Arguments.SPECIAL, /*OP_EXACT1*/
-        Arguments.SPECIAL, /*OP_EXACT2*/
-        Arguments.SPECIAL, /*OP_EXACT3*/
-        Arguments.SPECIAL, /*OP_EXACT4*/
-        Arguments.SPECIAL, /*OP_EXACT5*/
-        Arguments.SPECIAL, /*OP_EXACTN*/
-        Arguments.SPECIAL, /*OP_EXACTMB2N1*/
-        Arguments.SPECIAL, /*OP_EXACTMB2N2*/
-        Arguments.SPECIAL, /*OP_EXACTMB2N3*/
-        Arguments.SPECIAL, /*OP_EXACTMB2N*/
-        Arguments.SPECIAL, /*OP_EXACTMB3N*/
-        Arguments.SPECIAL, /*OP_EXACTMBN*/
-        Arguments.SPECIAL, /*OP_EXACT1_IC*/
-        Arguments.SPECIAL, /*OP_EXACTN_IC*/
-        Arguments.SPECIAL, /*OP_CCLASS*/
-        Arguments.SPECIAL, /*OP_CCLASS_MB*/
-        Arguments.SPECIAL, /*OP_CCLASS_MIX*/
-        Arguments.SPECIAL, /*OP_CCLASS_NOT*/
-        Arguments.SPECIAL, /*OP_CCLASS_MB_NOT*/
-        Arguments.SPECIAL, /*OP_CCLASS_MIX_NOT*/
-        Arguments.SPECIAL, /*OP_CCLASS_NODE*/
-        Arguments.NON, /*OP_ANYCHAR*/
-        Arguments.NON, /*OP_ANYCHAR_ML*/
-        Arguments.NON, /*OP_ANYCHAR_STAR*/
-        Arguments.NON, /*OP_ANYCHAR_ML_STAR*/
-        Arguments.SPECIAL, /*OP_ANYCHAR_STAR_PEEK_NEXT*/
-        Arguments.SPECIAL, /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
-        Arguments.NON, /*OP_WORD*/
-        Arguments.NON, /*OP_NOT_WORD*/
-        Arguments.NON, /*OP_WORD_BOUND*/
-        Arguments.NON, /*OP_NOT_WORD_BOUND*/
-        Arguments.NON, /*OP_WORD_BEGIN*/
-        Arguments.NON, /*OP_WORD_END*/
-        Arguments.NON, /*OP_BEGIN_BUF*/
-        Arguments.NON, /*OP_END_BUF*/
-        Arguments.NON, /*OP_BEGIN_LINE*/
-        Arguments.NON, /*OP_END_LINE*/
-        Arguments.NON, /*OP_SEMI_END_BUF*/
-        Arguments.NON, /*OP_BEGIN_POSITION*/
-        Arguments.NON, /*OP_BACKREF1*/
-        Arguments.NON, /*OP_BACKREF2*/
-        Arguments.MEMNUM, /*OP_BACKREFN*/
-        Arguments.SPECIAL, /*OP_BACKREFN_IC*/
-        Arguments.SPECIAL, /*OP_BACKREF_MULTI*/
-        Arguments.SPECIAL, /*OP_BACKREF_MULTI_IC*/
-        Arguments.SPECIAL, /*OP_BACKREF_AT_LEVEL*/
-        Arguments.MEMNUM, /*OP_MEMORY_START*/
-        Arguments.MEMNUM, /*OP_MEMORY_START_PUSH*/
-        Arguments.MEMNUM, /*OP_MEMORY_END_PUSH*/
-        Arguments.MEMNUM, /*OP_MEMORY_END_PUSH_REC*/
-        Arguments.MEMNUM, /*OP_MEMORY_END*/
-        Arguments.MEMNUM, /*OP_MEMORY_END_REC*/
-        Arguments.NON, /*OP_FAIL*/
-        Arguments.RELADDR, /*OP_JUMP*/
-        Arguments.RELADDR, /*OP_PUSH*/
-        Arguments.NON, /*OP_POP*/
-        Arguments.SPECIAL, /*OP_PUSH_OR_JUMP_EXACT1*/
-        Arguments.SPECIAL, /*OP_PUSH_IF_PEEK_NEXT*/
-        Arguments.SPECIAL, /*OP_REPEAT*/
-        Arguments.SPECIAL, /*OP_REPEAT_NG*/
-        Arguments.MEMNUM, /*OP_REPEAT_INC*/
-        Arguments.MEMNUM, /*OP_REPEAT_INC_NG*/
-        Arguments.MEMNUM, /*OP_REPEAT_INC_SG*/
-        Arguments.MEMNUM, /*OP_REPEAT_INC_NG_SG*/
-        Arguments.MEMNUM, /*OP_NULL_CHECK_START*/
-        Arguments.MEMNUM, /*OP_NULL_CHECK_END*/
-        Arguments.MEMNUM, /*OP_NULL_CHECK_END_MEMST*/
-        Arguments.MEMNUM, /*OP_NULL_CHECK_END_MEMST_PUSH*/
-        Arguments.NON, /*OP_PUSH_POS*/
-        Arguments.NON, /*OP_POP_POS*/
-        Arguments.RELADDR, /*OP_PUSH_POS_NOT*/
-        Arguments.NON, /*OP_FAIL_POS*/
-        Arguments.NON, /*OP_PUSH_STOP_BT*/
-        Arguments.NON, /*OP_POP_STOP_BT*/
-        Arguments.SPECIAL, /*OP_LOOK_BEHIND*/
-        Arguments.SPECIAL, /*OP_PUSH_LOOK_BEHIND_NOT*/
-        Arguments.NON, /*OP_FAIL_LOOK_BEHIND_NOT*/
-        Arguments.ABSADDR, /*OP_CALL*/
-        Arguments.NON, /*OP_RETURN*/
-        Arguments.SPECIAL, /*OP_STATE_CHECK_PUSH*/
-        Arguments.SPECIAL, /*OP_STATE_CHECK_PUSH_OR_JUMP*/
-        Arguments.STATE_CHECK, /*OP_STATE_CHECK*/
-        Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_STAR*/
-        Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
-        Arguments.OPTION, /*OP_SET_OPTION_PUSH*/
-        Arguments.OPTION, /*OP_SET_OPTION*/
-
-        // single byte versions
-        Arguments.NON, /*OP_ANYCHAR*/
-        Arguments.NON, /*OP_ANYCHAR_ML*/
-        Arguments.NON, /*OP_ANYCHAR_STAR*/
-        Arguments.NON, /*OP_ANYCHAR_ML_STAR*/
-        Arguments.SPECIAL, /*OP_ANYCHAR_STAR_PEEK_NEXT*/
-        Arguments.SPECIAL, /*OP_ANYCHAR_ML_STAR_PEEK_NEXT*/
-        Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_STAR*/
-        Arguments.STATE_CHECK, /*OP_STATE_CHECK_ANYCHAR_ML_STAR*/
-
-        Arguments.SPECIAL, /*OP_CCLASS*/
-        Arguments.SPECIAL, /*OP_CCLASS_NOT*/
-
-        Arguments.NON, /*OP_WORD*/
-        Arguments.NON, /*OP_NOT_WORD*/
-        Arguments.NON, /*OP_WORD_BOUND*/
-        Arguments.NON, /*OP_NOT_WORD_BOUND*/
-        Arguments.NON, /*OP_WORD_BEGIN*/
-        Arguments.NON, /*OP_WORD_END*/
-
-        Arguments.SPECIAL, /*OP_LOOK_BEHIND*/
-
-        Arguments.SPECIAL, /*OP_EXACT1_IC*/
-        Arguments.SPECIAL, /*OP_EXACTN_IC*/
-    } : null;
 }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/constants/Reduce.java b/src/jdk/nashorn/internal/runtime/regexp/joni/constants/Reduce.java
deleted file mode 100644
index a906e84d..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/constants/Reduce.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni.constants;
-
-import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.A;
-import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.AQ;
-import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.ASIS;
-import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.DEL;
-import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.PQ_Q;
-import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.P_QQ;
-import static jdk.nashorn.internal.runtime.regexp.joni.constants.Reduce.ReduceType.QQ;
-
-public interface Reduce {
-
-    enum ReduceType {
-        ASIS,       /* as is */
-        DEL,        /* delete parent */
-        A,          /* to '*'    */
-        AQ,         /* to '*?'   */
-        QQ,         /* to '??'   */
-        P_QQ,       /* to '+)??' */
-        PQ_Q,       /* to '+?)?' */
-    }
-
-    final ReduceType[][]REDUCE_TABLE = {
-      {DEL,     A,      A,      QQ,     AQ,     ASIS}, /* '?'  */
-      {DEL,     DEL,    DEL,    P_QQ,   P_QQ,   DEL},  /* '*'  */
-      {A,       A,      DEL,    ASIS,   P_QQ,   DEL},  /* '+'  */
-      {DEL,     AQ,     AQ,     DEL,    AQ,     AQ},   /* '??' */
-      {DEL,     DEL,    DEL,    DEL,    DEL,    DEL},  /* '*?' */
-      {ASIS,    PQ_Q,   DEL,    AQ,     AQ,     DEL}   /* '+?' */
-    };
-
-
-    final String PopularQStr[] = new String[] {
-        "?", "*", "+", "??", "*?", "+?"
-    };
-
-    String ReduceQStr[]= new String[] {
-        "", "", "*", "*?", "??", "+ and ??", "+? and ?"
-    };
-
-}
-
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/AsciiTables.java b/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/AsciiTables.java
deleted file mode 100644
index 3dec4ba2..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/AsciiTables.java
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni.encoding;
-
-public class AsciiTables {
-
-    public static final short AsciiCtypeTable[] = {
-            0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
-            0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
-            0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
-            0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
-            0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
-            0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
-            0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
-            0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
-            0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
-            0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
-            0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
-            0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
-            0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
-            0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
-            0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
-            0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
-            0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000
-    };
-
-    public static final byte ToLowerCaseTable[] = {
-            (byte)'\000', (byte)'\001', (byte)'\002', (byte)'\003', (byte)'\004', (byte)'\005', (byte)'\006', (byte)'\007',
-            (byte)'\010', (byte)'\011', (byte)'\012', (byte)'\013', (byte)'\014', (byte)'\015', (byte)'\016', (byte)'\017',
-            (byte)'\020', (byte)'\021', (byte)'\022', (byte)'\023', (byte)'\024', (byte)'\025', (byte)'\026', (byte)'\027',
-            (byte)'\030', (byte)'\031', (byte)'\032', (byte)'\033', (byte)'\034', (byte)'\035', (byte)'\036', (byte)'\037',
-            (byte)'\040', (byte)'\041', (byte)'\042', (byte)'\043', (byte)'\044', (byte)'\045', (byte)'\046', (byte)'\047',
-            (byte)'\050', (byte)'\051', (byte)'\052', (byte)'\053', (byte)'\054', (byte)'\055', (byte)'\056', (byte)'\057',
-            (byte)'\060', (byte)'\061', (byte)'\062', (byte)'\063', (byte)'\064', (byte)'\065', (byte)'\066', (byte)'\067',
-            (byte)'\070', (byte)'\071', (byte)'\072', (byte)'\073', (byte)'\074', (byte)'\075', (byte)'\076', (byte)'\077',
-            (byte)'\100', (byte)'\141', (byte)'\142', (byte)'\143', (byte)'\144', (byte)'\145', (byte)'\146', (byte)'\147',
-            (byte)'\150', (byte)'\151', (byte)'\152', (byte)'\153', (byte)'\154', (byte)'\155', (byte)'\156', (byte)'\157',
-            (byte)'\160', (byte)'\161', (byte)'\162', (byte)'\163', (byte)'\164', (byte)'\165', (byte)'\166', (byte)'\167',
-            (byte)'\170', (byte)'\171', (byte)'\172', (byte)'\133', (byte)'\134', (byte)'\135', (byte)'\136', (byte)'\137',
-            (byte)'\140', (byte)'\141', (byte)'\142', (byte)'\143', (byte)'\144', (byte)'\145', (byte)'\146', (byte)'\147',
-            (byte)'\150', (byte)'\151', (byte)'\152', (byte)'\153', (byte)'\154', (byte)'\155', (byte)'\156', (byte)'\157',
-            (byte)'\160', (byte)'\161', (byte)'\162', (byte)'\163', (byte)'\164', (byte)'\165', (byte)'\166', (byte)'\167',
-            (byte)'\170', (byte)'\171', (byte)'\172', (byte)'\173', (byte)'\174', (byte)'\175', (byte)'\176', (byte)'\177',
-            (byte)'\200', (byte)'\201', (byte)'\202', (byte)'\203', (byte)'\204', (byte)'\205', (byte)'\206', (byte)'\207',
-            (byte)'\210', (byte)'\211', (byte)'\212', (byte)'\213', (byte)'\214', (byte)'\215', (byte)'\216', (byte)'\217',
-            (byte)'\220', (byte)'\221', (byte)'\222', (byte)'\223', (byte)'\224', (byte)'\225', (byte)'\226', (byte)'\227',
-            (byte)'\230', (byte)'\231', (byte)'\232', (byte)'\233', (byte)'\234', (byte)'\235', (byte)'\236', (byte)'\237',
-            (byte)'\240', (byte)'\241', (byte)'\242', (byte)'\243', (byte)'\244', (byte)'\245', (byte)'\246', (byte)'\247',
-            (byte)'\250', (byte)'\251', (byte)'\252', (byte)'\253', (byte)'\254', (byte)'\255', (byte)'\256', (byte)'\257',
-            (byte)'\260', (byte)'\261', (byte)'\262', (byte)'\263', (byte)'\264', (byte)'\265', (byte)'\266', (byte)'\267',
-            (byte)'\270', (byte)'\271', (byte)'\272', (byte)'\273', (byte)'\274', (byte)'\275', (byte)'\276', (byte)'\277',
-            (byte)'\300', (byte)'\301', (byte)'\302', (byte)'\303', (byte)'\304', (byte)'\305', (byte)'\306', (byte)'\307',
-            (byte)'\310', (byte)'\311', (byte)'\312', (byte)'\313', (byte)'\314', (byte)'\315', (byte)'\316', (byte)'\317',
-            (byte)'\320', (byte)'\321', (byte)'\322', (byte)'\323', (byte)'\324', (byte)'\325', (byte)'\326', (byte)'\327',
-            (byte)'\330', (byte)'\331', (byte)'\332', (byte)'\333', (byte)'\334', (byte)'\335', (byte)'\336', (byte)'\337',
-            (byte)'\340', (byte)'\341', (byte)'\342', (byte)'\343', (byte)'\344', (byte)'\345', (byte)'\346', (byte)'\347',
-            (byte)'\350', (byte)'\351', (byte)'\352', (byte)'\353', (byte)'\354', (byte)'\355', (byte)'\356', (byte)'\357',
-            (byte)'\360', (byte)'\361', (byte)'\362', (byte)'\363', (byte)'\364', (byte)'\365', (byte)'\366', (byte)'\367',
-            (byte)'\370', (byte)'\371', (byte)'\372', (byte)'\373', (byte)'\374', (byte)'\375', (byte)'\376', (byte)'\377',
-    };
-
-    public static final byte ToUpperCaseTable[] = {
-            (byte)'\000', (byte)'\001', (byte)'\002', (byte)'\003', (byte)'\004', (byte)'\005', (byte)'\006', (byte)'\007',
-            (byte)'\010', (byte)'\011', (byte)'\012', (byte)'\013', (byte)'\014', (byte)'\015', (byte)'\016', (byte)'\017',
-            (byte)'\020', (byte)'\021', (byte)'\022', (byte)'\023', (byte)'\024', (byte)'\025', (byte)'\026', (byte)'\027',
-            (byte)'\030', (byte)'\031', (byte)'\032', (byte)'\033', (byte)'\034', (byte)'\035', (byte)'\036', (byte)'\037',
-            (byte)'\040', (byte)'\041', (byte)'\042', (byte)'\043', (byte)'\044', (byte)'\045', (byte)'\046', (byte)'\047',
-            (byte)'\050', (byte)'\051', (byte)'\052', (byte)'\053', (byte)'\054', (byte)'\055', (byte)'\056', (byte)'\057',
-            (byte)'\060', (byte)'\061', (byte)'\062', (byte)'\063', (byte)'\064', (byte)'\065', (byte)'\066', (byte)'\067',
-            (byte)'\070', (byte)'\071', (byte)'\072', (byte)'\073', (byte)'\074', (byte)'\075', (byte)'\076', (byte)'\077',
-            (byte)'\100', (byte)'\101', (byte)'\102', (byte)'\103', (byte)'\104', (byte)'\105', (byte)'\106', (byte)'\107',
-            (byte)'\110', (byte)'\111', (byte)'\112', (byte)'\113', (byte)'\114', (byte)'\115', (byte)'\116', (byte)'\117',
-            (byte)'\120', (byte)'\121', (byte)'\122', (byte)'\123', (byte)'\124', (byte)'\125', (byte)'\126', (byte)'\127',
-            (byte)'\130', (byte)'\131', (byte)'\132', (byte)'\133', (byte)'\134', (byte)'\135', (byte)'\136', (byte)'\137',
-            (byte)'\140', (byte)'\101', (byte)'\102', (byte)'\103', (byte)'\104', (byte)'\105', (byte)'\106', (byte)'\107',
-            (byte)'\110', (byte)'\111', (byte)'\112', (byte)'\113', (byte)'\114', (byte)'\115', (byte)'\116', (byte)'\117',
-            (byte)'\120', (byte)'\121', (byte)'\122', (byte)'\123', (byte)'\124', (byte)'\125', (byte)'\126', (byte)'\127',
-            (byte)'\130', (byte)'\131', (byte)'\132', (byte)'\173', (byte)'\174', (byte)'\175', (byte)'\176', (byte)'\177',
-            (byte)'\200', (byte)'\201', (byte)'\202', (byte)'\203', (byte)'\204', (byte)'\205', (byte)'\206', (byte)'\207',
-            (byte)'\210', (byte)'\211', (byte)'\212', (byte)'\213', (byte)'\214', (byte)'\215', (byte)'\216', (byte)'\217',
-            (byte)'\220', (byte)'\221', (byte)'\222', (byte)'\223', (byte)'\224', (byte)'\225', (byte)'\226', (byte)'\227',
-            (byte)'\230', (byte)'\231', (byte)'\232', (byte)'\233', (byte)'\234', (byte)'\235', (byte)'\236', (byte)'\237',
-            (byte)'\240', (byte)'\241', (byte)'\242', (byte)'\243', (byte)'\244', (byte)'\245', (byte)'\246', (byte)'\247',
-            (byte)'\250', (byte)'\251', (byte)'\252', (byte)'\253', (byte)'\254', (byte)'\255', (byte)'\256', (byte)'\257',
-            (byte)'\260', (byte)'\261', (byte)'\262', (byte)'\263', (byte)'\264', (byte)'\265', (byte)'\266', (byte)'\267',
-            (byte)'\270', (byte)'\271', (byte)'\272', (byte)'\273', (byte)'\274', (byte)'\275', (byte)'\276', (byte)'\277',
-            (byte)'\300', (byte)'\301', (byte)'\302', (byte)'\303', (byte)'\304', (byte)'\305', (byte)'\306', (byte)'\307',
-            (byte)'\310', (byte)'\311', (byte)'\312', (byte)'\313', (byte)'\314', (byte)'\315', (byte)'\316', (byte)'\317',
-            (byte)'\320', (byte)'\321', (byte)'\322', (byte)'\323', (byte)'\324', (byte)'\325', (byte)'\326', (byte)'\327',
-            (byte)'\330', (byte)'\331', (byte)'\332', (byte)'\333', (byte)'\334', (byte)'\335', (byte)'\336', (byte)'\337',
-            (byte)'\340', (byte)'\341', (byte)'\342', (byte)'\343', (byte)'\344', (byte)'\345', (byte)'\346', (byte)'\347',
-            (byte)'\350', (byte)'\351', (byte)'\352', (byte)'\353', (byte)'\354', (byte)'\355', (byte)'\356', (byte)'\357',
-            (byte)'\360', (byte)'\361', (byte)'\362', (byte)'\363', (byte)'\364', (byte)'\365', (byte)'\366', (byte)'\367',
-            (byte)'\370', (byte)'\371', (byte)'\372', (byte)'\373', (byte)'\374', (byte)'\375', (byte)'\376', (byte)'\377',
-    };
-
-    public static final int LowerMap[][] = {
-            {0x41, 0x61},
-            {0x42, 0x62},
-            {0x43, 0x63},
-            {0x44, 0x64},
-            {0x45, 0x65},
-            {0x46, 0x66},
-            {0x47, 0x67},
-            {0x48, 0x68},
-            {0x49, 0x69},
-            {0x4a, 0x6a},
-            {0x4b, 0x6b},
-            {0x4c, 0x6c},
-            {0x4d, 0x6d},
-            {0x4e, 0x6e},
-            {0x4f, 0x6f},
-            {0x50, 0x70},
-            {0x51, 0x71},
-            {0x52, 0x72},
-            {0x53, 0x73},
-            {0x54, 0x74},
-            {0x55, 0x75},
-            {0x56, 0x76},
-            {0x57, 0x77},
-            {0x58, 0x78},
-            {0x59, 0x79},
-            {0x5a, 0x7a}
-    };
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/ObjPtr.java b/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/ObjPtr.java
index 5238a03b..5c024577 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/ObjPtr.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/ObjPtr.java
@@ -30,6 +30,5 @@ public final class ObjPtr<T> {
 
     public T p;
 
-    static final ObjPtr<Void> NULL = new ObjPtr<Void>();
 }
 
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/PosixBracket.java b/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/PosixBracket.java
deleted file mode 100644
index 48978bf4..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/PosixBracket.java
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS".toCharArray(), WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni.encoding;
-
-import jdk.nashorn.internal.runtime.regexp.joni.exception.ErrorMessages;
-import jdk.nashorn.internal.runtime.regexp.joni.exception.JOniException;
-
-import java.util.HashMap;
-
-public class PosixBracket {
-
-    public static final char[][] PBSNamesLower = {
-            "alnum".toCharArray(),
-            "alpha".toCharArray(),
-            "blank".toCharArray(),
-            "cntrl".toCharArray(),
-            "digit".toCharArray(),
-            "graph".toCharArray(),
-            "lower".toCharArray(),
-            "print".toCharArray(),
-            "punct".toCharArray(),
-            "space".toCharArray(),
-            "upper".toCharArray(),
-            "xdigit".toCharArray(),
-            "ascii".toCharArray(),
-            "word".toCharArray()
-    };
-
-    public static final int PBSValues[] = {
-            CharacterType.ALNUM,
-            CharacterType.ALPHA,
-            CharacterType.BLANK,
-            CharacterType.CNTRL,
-            CharacterType.DIGIT,
-            CharacterType.GRAPH,
-            CharacterType.LOWER,
-            CharacterType.PRINT,
-            CharacterType.PUNCT,
-            CharacterType.SPACE,
-            CharacterType.UPPER,
-            CharacterType.XDIGIT,
-            CharacterType.ASCII,
-            CharacterType.WORD,
-    };
-
-    public static int propertyNameToCType(String name) {
-        name = name.toLowerCase();
-        if (!PBSTableUpper.containsKey(name)) {
-            throw new JOniException(ErrorMessages.ERR_INVALID_CHAR_PROPERTY_NAME.replaceAll("%n", name));
-        }
-        return PBSTableUpper.get(name);
-    }
-
-    private static final HashMap<String,Integer> PBSTableUpper = new HashMap<String,Integer>();
-
-    static {
-        for (int i=0; i<PBSValues.length; i++) PBSTableUpper.put(new String(PBSNamesLower[i]), PBSValues[i]);
-    }
-
-}
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/Ptr.java b/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/Ptr.java
deleted file mode 100644
index 57a28b9c..00000000
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/encoding/Ptr.java
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni.encoding;
-
-public final class Ptr {
-    public Ptr() {
-        this(0);
-    }
-
-    public Ptr(int p) {
-        this.p = p;
-    }
-
-    public int p;
-
-    public static final Ptr NULL = new Ptr(0);
-}
-
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ErrorMessages.java b/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ErrorMessages.java
index 87e2a49a..917af7f6 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ErrorMessages.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ErrorMessages.java
@@ -22,28 +22,16 @@ package jdk.nashorn.internal.runtime.regexp.joni.exception;
 import jdk.nashorn.internal.runtime.regexp.joni.Config;
 
 public interface ErrorMessages {
-    final String MISMATCH = "mismatch";
-    final String NO_SUPPORT_CONFIG = "no support in this configuration";
 
     /* from jcodings */
-    final String ERR_INVALID_CHAR_PROPERTY_NAME = "invalid character property name <%n>";
     final String ERR_INVALID_CODE_POINT_VALUE = "invalid code point value";
     final String ERR_TOO_BIG_WIDE_CHAR_VALUE = "too big wide-char value";
     final String ERR_TOO_LONG_WIDE_CHAR_VALUE = "too long wide-char value";
 
     /* internal error */
-    final String ERR_MEMORY = "fail to memory allocation";
-    final String ERR_MATCH_STACK_LIMIT_OVER = "match-stack limit over";
-    final String ERR_TYPE_BUG = "undefined type (bug)";
     final String ERR_PARSER_BUG = "internal parser error (bug)";
-    final String ERR_STACK_BUG = "stack error (bug)";
     final String ERR_UNDEFINED_BYTECODE = "undefined bytecode (bug)";
     final String ERR_UNEXPECTED_BYTECODE = "unexpected bytecode (bug)";
-    final String ERR_DEFAULT_ENCODING_IS_NOT_SETTED = "default multibyte-encoding is not setted";
-    final String ERR_SPECIFIED_ENCODING_CANT_CONVERT_TO_WIDE_CHAR = "can't convert to wide-char on specified multibyte-encoding";
-
-    /* general error */
-    final String ERR_INVALID_ARGUMENT = "invalid argument";
 
     /* syntax error */
     final String ERR_END_PATTERN_AT_LEFT_BRACE = "end pattern at left brace";
@@ -56,11 +44,9 @@ public interface ErrorMessages {
     final String ERR_META_CODE_SYNTAX = "invalid meta-code syntax";
     final String ERR_CONTROL_CODE_SYNTAX = "invalid control-code syntax";
     final String ERR_CHAR_CLASS_VALUE_AT_END_OF_RANGE = "char-class value at end of range";
-    final String ERR_CHAR_CLASS_VALUE_AT_START_OF_RANGE = "char-class value at start of range";
     final String ERR_UNMATCHED_RANGE_SPECIFIER_IN_CHAR_CLASS = "unmatched range specifier in char-class";
     final String ERR_TARGET_OF_REPEAT_OPERATOR_NOT_SPECIFIED = "target of repeat operator is not specified";
     final String ERR_TARGET_OF_REPEAT_OPERATOR_INVALID = "target of repeat operator is invalid";
-    final String ERR_NESTED_REPEAT_OPERATOR = "nested repeat operator";
     final String ERR_UNMATCHED_CLOSE_PARENTHESIS = "unmatched close parenthesis";
     final String ERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS = "end pattern with unmatched parenthesis";
     final String ERR_END_PATTERN_IN_GROUP = "end pattern in group";
@@ -74,25 +60,14 @@ public interface ErrorMessages {
     final String ERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE = "too big number for repeat range";
     final String ERR_UPPER_SMALLER_THAN_LOWER_IN_REPEAT_RANGE = "upper is smaller than lower in repeat range";
     final String ERR_EMPTY_RANGE_IN_CHAR_CLASS = "empty range in char class";
-    final String ERR_MISMATCH_CODE_LENGTH_IN_CLASS_RANGE = "mismatch multibyte code length in char-class range";
     final String ERR_TOO_MANY_MULTI_BYTE_RANGES = "too many multibyte code ranges are specified";
     final String ERR_TOO_SHORT_MULTI_BYTE_STRING = "too short multibyte code string";
-    final String ERR_TOO_BIG_BACKREF_NUMBER = "too big backref number";
-    final String ERR_INVALID_BACKREF = Config.USE_NAMED_GROUP ? "invalid backref number/name" : "invalid backref number";
+    final String ERR_INVALID_BACKREF = "invalid backref number";
     final String ERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED = "numbered backref/call is not allowed. (use name)";
-    final String ERR_INVALID_WIDE_CHAR_VALUE = "invalid wide-char value";
     final String ERR_EMPTY_GROUP_NAME = "group name is empty";
     final String ERR_INVALID_GROUP_NAME = "invalid group name <%n>";
-    final String ERR_INVALID_CHAR_IN_GROUP_NAME = Config.USE_NAMED_GROUP ? "invalid char in group name <%n>" : "invalid char in group number <%n>";
-    final String ERR_UNDEFINED_NAME_REFERENCE = "undefined name <%n> reference";
-    final String ERR_UNDEFINED_GROUP_REFERENCE = "undefined group <%n> reference";
-    final String ERR_MULTIPLEX_DEFINED_NAME = "multiplex defined name <%n>";
-    final String ERR_MULTIPLEX_DEFINITION_NAME_CALL = "multiplex definition name <%n> call";
-    final String ERR_NEVER_ENDING_RECURSION = "never ending recursion";
+    final String ERR_INVALID_CHAR_IN_GROUP_NAME = "invalid char in group number <%n>";
     final String ERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY = "group number is too big for capture history";
-    final String ERR_NOT_SUPPORTED_ENCODING_COMBINATION = "not supported encoding combination";
     final String ERR_INVALID_COMBINATION_OF_OPTIONS = "invalid combination of options";
-    final String ERR_OVER_THREAD_PASS_LIMIT_COUNT = "over thread pass limit count";
-    final String ERR_TOO_BIG_SB_CHAR_VALUE = "too big singlebyte char value";
 
 }
diff --git a/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ValueException.java b/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ValueException.java
index d56a35a4..597fe221 100644
--- a/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ValueException.java
+++ b/src/jdk/nashorn/internal/runtime/regexp/joni/exception/ValueException.java
@@ -30,8 +30,4 @@ public class ValueException extends SyntaxException{
         super(message.replaceAll("%n", str));
     }
 
-    public ValueException(String message, byte[]bytes, int p, int end) {
-        this(message, new String(bytes, p, end - p));
-    }
-
 }
diff --git a/src/jdk/nashorn/internal/runtime/resources/Messages.properties b/src/jdk/nashorn/internal/runtime/resources/Messages.properties
index 9f327521..b8d9e5e3 100644
--- a/src/jdk/nashorn/internal/runtime/resources/Messages.properties
+++ b/src/jdk/nashorn/internal/runtime/resources/Messages.properties
@@ -125,6 +125,7 @@ type.error.no.constructor.matches.args=Can not construct {0} with the passed arg
 type.error.no.method.matches.args=Can not invoke method {0} with the passed arguments; they do not match any of its method signatures.
 type.error.method.not.constructor=Java method {0} can't be used as a constructor.
 type.error.env.not.object=$ENV must be an Object.
+type.error.unsupported.java.to.type=Unsupported Java.to target type {0}.
 range.error.inappropriate.array.length=inappropriate array length: {0}
 range.error.invalid.fraction.digits=fractionDigits argument to {0} must be in [0, 20]
 range.error.invalid.precision=precision argument toPrecision() must be in [1, 21]
diff --git a/src/jdk/nashorn/internal/runtime/resources/Options.properties b/src/jdk/nashorn/internal/runtime/resources/Options.properties
index 47173197..4dd6df6f 100644
--- a/src/jdk/nashorn/internal/runtime/resources/Options.properties
+++ b/src/jdk/nashorn/internal/runtime/resources/Options.properties
@@ -277,6 +277,12 @@ nashorn.option.print.symbols = {   \
     desc="Print the symbol table." \
 }
 
+nashorn.option.range.analysis = { \
+    name="--range-analysis",      \
+    is_undocumented=true,         \
+    desc="Do range analysis using known compile time types, and try to narrow number types" \
+}    
+
 nashorn.option.D = {                                                          \
     name="-D",                                                                \
     desc="-Dname=value. Set a system property. This option can be repeated.", \
@@ -326,6 +332,15 @@ nashorn.option.timezone = {                    \
     type=TimeZone                              \
 }
 
+nashorn.option.locale = {                    \
+    name="--locale",                         \
+    short_name="-l",                         \
+    is_undocumented=true,                    \
+    params="<locale>",                       \
+    desc="Set Locale for script execution.", \
+    type=Locale                              \
+}
+
 nashorn.option.trace.callsites = {                                              \
     name="--trace-callsites",                                                   \
     short_name="-tcs",                                                          \
diff --git a/test/script/basic/JDK-8008554.js b/test/script/basic/JDK-8008554.js
index 0cbe8b8e..f8ec9587 100644
--- a/test/script/basic/JDK-8008554.js
+++ b/test/script/basic/JDK-8008554.js
@@ -32,5 +32,5 @@
 var dir = __DIR__;
 var file = __FILE__.replace("JDK-8008554", "NASHORN-99");
 load(file);
-file = "file://" + __DIR__ + "NASHORN-99.js";
+file = "file:///" + __DIR__ + "NASHORN-99.js";
 load(file);
diff --git a/test/script/basic/JDK-8010804.js b/test/script/basic/JDK-8010804.js
new file mode 100644
index 00000000..04e216ad
--- /dev/null
+++ b/test/script/basic/JDK-8010804.js
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8010804: Review long and integer usage conventions
+ *
+ * @test
+ * @run
+ */
+
+var x = [];
+print(x.length);
+x[4294967294] = 1;
+print(x.length);
+x[4294967295] = 1;
+print(x.length);
+print(x.slice(4294967293).length);
+print(x.slice(4294967294).length);
+print(x.slice(4294967295).length);
+print(x.slice(4294967296).length);
+
+print(x.slice(-4294967293).length);
+print(x.slice(-4294967294).length);
+print(x.slice(-4294967295).length);
+print(x.slice(-4294967296).length);
+
+print(x.slice(0, 4294967293).length);
+print(x.slice(0, 4294967294).length);
+print(x.slice(0, 4294967295).length);
+print(x.slice(0, 4294967296).length);
+
+print(x.slice(0, -4294967293).length);
+print(x.slice(0, -4294967294).length);
+print(x.slice(0, -4294967295).length);
+print(x.slice(0, -4294967296).length);
+
+print(x.slice(9223371036854775807).length);
+print(x.slice(9223372036854775807).length);
+print(x.slice(9223373036854775807).length);
+print(x.slice(9223374036854775807).length);
+
+print(x.slice(-9223371036854775807).length);
+print(x.slice(-9223372036854775807).length);
+print(x.slice(-9223373036854775807).length);
+print(x.slice(-9223374036854775807).length);
+
+print(x.slice(-9223371036854775807, 1).length);
+print(x.slice(-9223372036854775807, 1).length);
+print(x.slice(-9223373036854775807, 1).length);
+print(x.slice(-9223374036854775807, 1).length);
+
+print(x.slice(-9223371036854775807, -1).length);
+print(x.slice(-9223372036854775807, -1).length);
+print(x.slice(-9223373036854775807, -1).length);
+print(x.slice(-9223374036854775807, -1).length);
+
+print(x.slice(Infinity).length);
+print(x.slice(Infinity, Infinity).length);
+print(x.slice(Infinity, -Infinity).length);
+print(x.slice(-Infinity).length);
+print(x.slice(-Infinity, Infinity).length);
+print(x.slice(-Infinity, -Infinity).length);
+
+var d = new Date();
+d.setYear(Infinity);
+print(d);
\ No newline at end of file
diff --git a/test/script/basic/JDK-8010804.js.EXPECTED b/test/script/basic/JDK-8010804.js.EXPECTED
new file mode 100644
index 00000000..1f73ec04
--- /dev/null
+++ b/test/script/basic/JDK-8010804.js.EXPECTED
@@ -0,0 +1,42 @@
+0
+4294967295
+4294967295
+2
+1
+0
+0
+4294967293
+4294967294
+4294967295
+4294967295
+4294967293
+4294967294
+4294967295
+4294967295
+2
+1
+0
+0
+0
+0
+0
+0
+4294967295
+4294967295
+4294967295
+4294967295
+1
+1
+1
+1
+4294967294
+4294967294
+4294967294
+4294967294
+0
+0
+0
+4294967295
+4294967295
+0
+Invalid Date
diff --git a/test/script/basic/JDK-8011023.js b/test/script/basic/JDK-8011023.js
new file mode 100644
index 00000000..fbc2ca96
--- /dev/null
+++ b/test/script/basic/JDK-8011023.js
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Round should be ecma compliant
+ *
+ * @test
+ * @run 
+ */
+
+print(1/Math.round(-0.5));
+print(Math.round(9007199254740991));
+print(Math.round(9223372036854775807*2));
+
diff --git a/test/script/basic/JDK-8011023.js.EXPECTED b/test/script/basic/JDK-8011023.js.EXPECTED
new file mode 100644
index 00000000..f7e1ef45
--- /dev/null
+++ b/test/script/basic/JDK-8011023.js.EXPECTED
@@ -0,0 +1,3 @@
+-Infinity
+9007199254740991
+18446744073709552000
diff --git a/test/script/basic/JDK-8011718.js b/test/script/basic/JDK-8011718.js
new file mode 100644
index 00000000..7cb24f24
--- /dev/null
+++ b/test/script/basic/JDK-8011718.js
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8011718: binding already bound function with extra arguments fails.
+ *
+ * @test
+ * @run
+ */
+
+var obj = { 
+    hello:"From obj", 
+}; 
+var obj2 = { 
+    hello:"From obj2", 
+}; 
+
+function doit(cb){ 
+    cb(); 
+    var cb2 = cb.bind(obj2, "This one is not acccepted"); 
+    cb2(); 
+} 
+
+doit(function(){ 
+        print(this.hello); 
+    }.bind(obj));
diff --git a/test/script/basic/JDK-8011718.js.EXPECTED b/test/script/basic/JDK-8011718.js.EXPECTED
new file mode 100644
index 00000000..58a7d556
--- /dev/null
+++ b/test/script/basic/JDK-8011718.js.EXPECTED
@@ -0,0 +1,2 @@
+From obj
+From obj
diff --git a/test/script/basic/JDK-8012083.js b/test/script/basic/JDK-8012083.js
new file mode 100644
index 00000000..e782ff53
--- /dev/null
+++ b/test/script/basic/JDK-8012083.js
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8012093 - array literals can only be subject to constant evaluation under very special
+ * circumstances.
+ *
+ * @test
+ * @run
+ */
+
+
+var w00t = 17;
+print(+[w00t]);
+
+var empty = [];
+print(empty == false);
+
+print([] == false);
+print([] === false);
+print(!![]);
+
+print(~[]);
+print(![]);
+print(![17]);
+print(![17,1,2]);
+
+var one = 1;
+var two = 2;
+var a1 = [one];
+var a2 = [two];
+print(+a1 + +a2); //3
+
+var x = 1;
+print(+["apa"]);
+print(+[]);  //0
+print(+[1]); //1
+print(+[x]); //1
+print(+[1,2,3]); //NaN
+var a = [];
+var b = [1];
+print(a/b);
+print(++[[]][+[]]+[+[]]); //10
+print(+[] == 0);
+
+var first = [![]+[]][+[]][+[]]+[![]+[]][+[]][+!+[]]+[!+[]+[]][+![]][+![]]+[![]+[]][+[]][+!+[]]+[![]+[]][+[]][+!+[]+!+[]];
+var second =(![]+[])[+[]]+(![]+[])[+!+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]];
+
+print(first + " " + second);
+
diff --git a/test/script/basic/JDK-8012083.js.EXPECTED b/test/script/basic/JDK-8012083.js.EXPECTED
new file mode 100644
index 00000000..72d1e673
--- /dev/null
+++ b/test/script/basic/JDK-8012083.js.EXPECTED
@@ -0,0 +1,19 @@
+17
+true
+true
+false
+true
+-1
+false
+false
+false
+3
+NaN
+0
+1
+1
+NaN
+0
+10
+true
+fatal fail
diff --git a/test/script/basic/JDK-8012305.js b/test/script/basic/JDK-8012305.js
new file mode 100644
index 00000000..d08502de
--- /dev/null
+++ b/test/script/basic/JDK-8012305.js
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8012305: Function.bind can't be called on prototype function inside constructor 
+ *
+ * @test
+ * @run
+ */
+
+function MyObject() {
+    // If the call to bind is removed, then the function is properly printed.
+    print("function " + this._process);
+    this._process = this._process.bind(this);
+}
+
+MyObject.prototype._process = function() { print("Message "); }
+
+var s = new MyObject(); 
diff --git a/test/script/basic/JDK-8012305.js.EXPECTED b/test/script/basic/JDK-8012305.js.EXPECTED
new file mode 100644
index 00000000..b509e0c1
--- /dev/null
+++ b/test/script/basic/JDK-8012305.js.EXPECTED
@@ -0,0 +1 @@
+function function() { print("Message "); }
diff --git a/test/script/basic/JDK-8013919.js b/test/script/basic/JDK-8013919.js
new file mode 100644
index 00000000..bd25dc12
--- /dev/null
+++ b/test/script/basic/JDK-8013919.js
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8013913: finally cloning of function node declarations caused
+ * method collissions
+ *
+ * @test
+ * @run
+ */
+
+try {
+    print("a");
+} finally {
+    var b = function() {
+	print("b");
+    }
+    b();
+}
diff --git a/test/script/basic/JDK-8013919.js.EXPECTED b/test/script/basic/JDK-8013919.js.EXPECTED
new file mode 100644
index 00000000..422c2b7a
--- /dev/null
+++ b/test/script/basic/JDK-8013919.js.EXPECTED
@@ -0,0 +1,2 @@
+a
+b
diff --git a/test/script/basic/JDK-8014426.js b/test/script/basic/JDK-8014426.js
new file mode 100644
index 00000000..220aa7f3
--- /dev/null
+++ b/test/script/basic/JDK-8014426.js
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * Ensure catchall exceptions from finally inlining are rethrown as is
+ *
+ * @test
+ * @run
+ */
+
+function runScriptEngine() {
+    var fac    = new Packages.jdk.nashorn.api.scripting.NashornScriptEngineFactory();
+    var engine = fac.getScriptEngine();
+    engine.eval(
+"try {\n\
+  doIt();\n\
+} finally { \n\
+  var x = 17;\n\
+}\n\
+function doIt() {\n\
+  throw new TypeError('en stor graa noshoerning!');\n\
+}\n");
+}
+
+try {
+    runScriptEngine();
+} catch(e) {
+    print(e);
+}
diff --git a/test/script/basic/JDK-8014426.js.EXPECTED b/test/script/basic/JDK-8014426.js.EXPECTED
new file mode 100644
index 00000000..8a8b2a06
--- /dev/null
+++ b/test/script/basic/JDK-8014426.js.EXPECTED
@@ -0,0 +1 @@
+javax.script.ScriptException: TypeError: en stor graa noshoerning! in <eval> at line number 7 at column number 2
diff --git a/test/script/basic/JDK-8014647.js b/test/script/basic/JDK-8014647.js
new file mode 100644
index 00000000..8ecc2110
--- /dev/null
+++ b/test/script/basic/JDK-8014647.js
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8014647: Allow class-based overrides to be initialized with a ScriptFunction
+ *
+ * @test
+ * @run
+ */
+
+var RunnableImpl1 = Java.extend(java.lang.Runnable, function() { print("I'm runnable 1!") })
+var RunnableImpl2 = Java.extend(java.lang.Runnable, function() { print("I'm runnable 2!") })
+var r1 = new RunnableImpl1()
+var r2 = new RunnableImpl2()
+var r3 = new RunnableImpl2(function() { print("I'm runnable 3!") })
+r1.run()
+r2.run()
+r3.run()
+print("r1.class === r2.class: " + (r1.class === r2.class))
+print("r2.class === r3.class: " + (r2.class === r3.class))
diff --git a/test/script/basic/JDK-8014647.js.EXPECTED b/test/script/basic/JDK-8014647.js.EXPECTED
new file mode 100644
index 00000000..641a13b1
--- /dev/null
+++ b/test/script/basic/JDK-8014647.js.EXPECTED
@@ -0,0 +1,5 @@
+I'm runnable 1!
+I'm runnable 2!
+I'm runnable 3!
+r1.class === r2.class: false
+r2.class === r3.class: true
diff --git a/test/script/basic/JDK-8014735.js b/test/script/basic/JDK-8014735.js
new file mode 100644
index 00000000..0fc367c0
--- /dev/null
+++ b/test/script/basic/JDK-8014735.js
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8014735: Typed Array, BYTES_PER_ELEMENT should be a class property
+ *
+ * @test
+ * @run
+ */
+
+function bytesPerElement(func) {
+    print(func.name + ".BYTES_PER_ELEMENT = " + func.BYTES_PER_ELEMENT);
+}
+
+bytesPerElement(Int8Array);
+bytesPerElement(Int16Array);
+bytesPerElement(Int32Array);
+bytesPerElement(Uint8Array);
+bytesPerElement(Uint8ClampedArray);
+bytesPerElement(Uint16Array);
+bytesPerElement(Uint32Array);
+bytesPerElement(Float32Array);
+bytesPerElement(Float64Array);
diff --git a/test/script/basic/JDK-8014735.js.EXPECTED b/test/script/basic/JDK-8014735.js.EXPECTED
new file mode 100644
index 00000000..bae22d61
--- /dev/null
+++ b/test/script/basic/JDK-8014735.js.EXPECTED
@@ -0,0 +1,9 @@
+Int8Array.BYTES_PER_ELEMENT = 1
+Int16Array.BYTES_PER_ELEMENT = 2
+Int32Array.BYTES_PER_ELEMENT = 4
+Uint8Array.BYTES_PER_ELEMENT = 1
+Uint8ClampedArray.BYTES_PER_ELEMENT = 1
+Uint16Array.BYTES_PER_ELEMENT = 2
+Uint32Array.BYTES_PER_ELEMENT = 4
+Float32Array.BYTES_PER_ELEMENT = 4
+Float64Array.BYTES_PER_ELEMENT = 8
diff --git a/test/script/basic/JDK-8014953.js b/test/script/basic/JDK-8014953.js
new file mode 100644
index 00000000..ba7cef0f
--- /dev/null
+++ b/test/script/basic/JDK-8014953.js
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8014953: Have NativeJavaPackage throw a ClassNotFoundException when invoked with "new"
+ *
+ * @test
+ * @run
+ */
+ 
+try {
+    new java.util.ArrrayList(16)
+} catch(e) {
+   print("Invoked as constructor");
+   print("e.class=" + e.class)
+   print("e.message=" + e.message);
+}
+
+try {
+    java.util.ArrrayList(16)
+} catch(e) {
+   print("Invoked as method");
+   print("e.class=" + e.class)
+   print("e.message=" + e.message);
+}
diff --git a/test/script/basic/JDK-8014953.js.EXPECTED b/test/script/basic/JDK-8014953.js.EXPECTED
new file mode 100644
index 00000000..d3711121
--- /dev/null
+++ b/test/script/basic/JDK-8014953.js.EXPECTED
@@ -0,0 +1,6 @@
+Invoked as constructor
+e.class=class java.lang.ClassNotFoundException
+e.message=java.util.ArrrayList
+Invoked as method
+e.class=class java.lang.ClassNotFoundException
+e.message=java.util.ArrrayList
diff --git a/test/script/basic/JDK-8015267.js b/test/script/basic/JDK-8015267.js
new file mode 100644
index 00000000..b7c1f9bf
--- /dev/null
+++ b/test/script/basic/JDK-8015267.js
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8015267: have a List/Deque adapter for JS array-like objects
+ *
+ * @test
+ * @run
+ */
+ 
+var a = ['a', 'b', 'c', 'd']
+
+var l = Java.to(a, java.util.List)
+print(l instanceof java.util.List)
+print(l instanceof java.util.Deque)
+
+print(l[0])
+print(l[1])
+print(l[2])
+print(l[3])
+
+print(l.size())
+
+l.push('x')
+print(a)
+
+l.addLast('y')
+print(a)
+
+print(l.pop())
+print(l.removeLast())
+print(a)
+
+l.add('e')
+l.add(5, 'f')
+print(a)
+
+l.add(0, 'z')
+print(a)
+
+l.add(2, 'x')
+print(a)
+
+l[7] = 'g'
+print(a)
+
+try { l.add(15, '') } catch(e) { print(e.class) } 
+try { l.remove(15) } catch(e) { print(e.class) } 
+try { l.add(-1, '') } catch(e) { print(e.class) } 
+try { l.remove(-1) } catch(e) { print(e.class) } 
+
+l.remove(7)
+l.remove(2)
+l.remove(0)
+print(a)
+
+print(l.peek())
+print(l.peekFirst())
+print(l.peekLast())
+
+print(l.element())
+print(l.getFirst())
+print(l.getLast())
+
+l.offer('1')
+l.offerFirst('2')
+l.offerLast('3')
+print(a)
+
+a = ['1', '2', 'x', '3', '4', 'x', '5', '6', 'x', '7', '8']
+print(a)
+var l = Java.to(a, java.util.List)
+l.removeFirstOccurrence('x')
+print(a)
+l.removeLastOccurrence('x')
+print(a)
+
+var empty = Java.to([], java.util.List)
+try { empty.pop() } catch(e) { print(e.class) }
+try { empty.removeFirst() } catch(e) { print(e.class) }
+try { empty.removeLast() } catch(e) { print(e.class) }
+
+try { empty.element() } catch(e) { print(e.class) }
+try { empty.getFirst() } catch(e) { print(e.class) }
+try { empty.getLast() } catch(e) { print(e.class) }
+
+print(empty.peek())
+print(empty.peekFirst())
+print(empty.peekLast())
diff --git a/test/script/basic/JDK-8015267.js.EXPECTED b/test/script/basic/JDK-8015267.js.EXPECTED
new file mode 100644
index 00000000..9f49603b
--- /dev/null
+++ b/test/script/basic/JDK-8015267.js.EXPECTED
@@ -0,0 +1,40 @@
+true
+true
+a
+b
+c
+d
+4
+x,a,b,c,d
+x,a,b,c,d,y
+x
+y
+a,b,c,d
+a,b,c,d,e,f
+z,a,b,c,d,e,f
+z,a,x,b,c,d,e,f
+z,a,x,b,c,d,e,g
+class java.lang.IndexOutOfBoundsException
+class java.lang.IndexOutOfBoundsException
+class java.lang.IndexOutOfBoundsException
+class java.lang.IndexOutOfBoundsException
+a,b,c,d,e
+a
+a
+e
+a
+a
+e
+2,a,b,c,d,e,1,3
+1,2,x,3,4,x,5,6,x,7,8
+1,2,3,4,x,5,6,x,7,8
+1,2,3,4,x,5,6,7,8
+class java.util.NoSuchElementException
+class java.util.NoSuchElementException
+class java.util.NoSuchElementException
+class java.util.NoSuchElementException
+class java.util.NoSuchElementException
+class java.util.NoSuchElementException
+null
+null
+null
diff --git a/test/script/basic/JDK-8015348.js b/test/script/basic/JDK-8015348.js
new file mode 100644
index 00000000..77ff6031
--- /dev/null
+++ b/test/script/basic/JDK-8015348.js
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8015348: RegExp("[") results in StackOverflowError
+ *
+ * @test
+ * @run
+ */
+
+try {
+    new RegExp('[');
+} catch (error) {
+    print(error.name);
+}
diff --git a/test/script/basic/JDK-8015348.js.EXPECTED b/test/script/basic/JDK-8015348.js.EXPECTED
new file mode 100644
index 00000000..8729fc43
--- /dev/null
+++ b/test/script/basic/JDK-8015348.js.EXPECTED
@@ -0,0 +1 @@
+SyntaxError
diff --git a/test/script/basic/JDK-8015349.js b/test/script/basic/JDK-8015349.js
new file mode 100644
index 00000000..7588a651
--- /dev/null
+++ b/test/script/basic/JDK-8015349.js
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8015349: "abc".lastIndexOf("a",-1) should evaluate to 0 and not -1
+ *
+ * @test
+ * @run
+ */
+
+function printEval(code) {
+    print(code + " = " + eval(code));
+}
+
+printEval("'abc'.lastIndexOf('a', 4)"); 
+printEval("'abc'.lastIndexOf('b', Infinity)");
+printEval("'abc'.lastIndexOf('a', -1)");
+printEval("'abc'.lastIndexOf('a', -Infinity)");
+printEval("'oracle'.lastIndexOf('u')");
+printEval("'hello'.lastIndexOf('l')");
+printEval("'hello'.lastIndexOf('l', 2)");
+printEval("'hello'.lastIndexOf('l', 3)");
+printEval("'hello'.lastIndexOf('l', 1)");
diff --git a/test/script/basic/JDK-8015349.js.EXPECTED b/test/script/basic/JDK-8015349.js.EXPECTED
new file mode 100644
index 00000000..f743dc4c
--- /dev/null
+++ b/test/script/basic/JDK-8015349.js.EXPECTED
@@ -0,0 +1,9 @@
+'abc'.lastIndexOf('a', 4) = 0
+'abc'.lastIndexOf('b', Infinity) = 1
+'abc'.lastIndexOf('a', -1) = 0
+'abc'.lastIndexOf('a', -Infinity) = 0
+'oracle'.lastIndexOf('u') = -1
+'hello'.lastIndexOf('l') = 3
+'hello'.lastIndexOf('l', 2) = 2
+'hello'.lastIndexOf('l', 3) = 3
+'hello'.lastIndexOf('l', 1) = -1
diff --git a/test/script/basic/JDK-8015352.js b/test/script/basic/JDK-8015352.js
new file mode 100644
index 00000000..b40e6461
--- /dev/null
+++ b/test/script/basic/JDK-8015352.js
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8015352: "i".toUpperCase() => currently returns "İ", but should be "I" (with Turkish locale)
+ *
+ * @test
+ * @option --locale=tr-TR
+ * @run
+ */
+
+if ("i".toUpperCase() != "I") {
+    fail("'i'.toUpperCase() is not 'I'");
+}
+
+if ("i".toUpperCase() == "i".toLocaleUpperCase()) {
+    fail("'i'.toUpperCase() == 'i'.toLocaleUpperCase()");
+}
+
+if ("I".toLowerCase() != "i") {
+    fail("'I'.toLowerCase() is not 'i'");
+}
+
+if ("I".toLowerCase() == "I".toLocaleLowerCase()) {
+    fail("'i'.toLowerCase() == 'i'.toLocaleLowerCase()");
+}
diff --git a/test/script/basic/JDK-8015354.js b/test/script/basic/JDK-8015354.js
new file mode 100644
index 00000000..3cbe676e
--- /dev/null
+++ b/test/script/basic/JDK-8015354.js
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * JDK-8015354: JSON.parse should not use [[Put]] but use [[DefineOwnProperty]] instead 
+ *
+ * @test
+ * @run
+ */
+
+Object.defineProperty(Object.prototype,
+    "", {
+    set: function(v) {
+        throw "set called";
+    }
+});
+
+JSON.parse('{}',function(){});
+
+Object.defineProperty(Object.prototype,
+    "foo",{
+    set: function(v) {
+        throw "set called";
+    }
+});
+JSON.parse('{"foo": 1}');
diff --git a/test/script/basic/NASHORN-377.js b/test/script/basic/NASHORN-377.js
index e77be2bf..31d4df49 100644
--- a/test/script/basic/NASHORN-377.js
+++ b/test/script/basic/NASHORN-377.js
@@ -43,7 +43,7 @@ function tohex(d, w) {
 function arrstr(a, n, w) {
   var s = "";
   if (typeof n == "undefined") n = a.length;
-  if (typeof w == "undefined") w = a.BYTES_PER_ELEMENT * 2;
+  if (typeof w == "undefined") w = a.constructor.BYTES_PER_ELEMENT * 2;
   for (var i = 0; i < n; i++) {
     s += tohex(a[i], w);
   }
@@ -96,7 +96,7 @@ function fillArray(a, start) {
   var b = new ArrayBuffer(8);
   for (var i in types) {
     var x = new types[i](b);
-    print(x.byteOffset, x.byteLength, x.length, x.BYTES_PER_ELEMENT);
+    print(x.byteOffset, x.byteLength, x.length, x.constructor.BYTES_PER_ELEMENT);
     assertTrue(function(){ return x.constructor === types[i] });
   }
 })();
diff --git a/test/script/basic/NASHORN-556.js b/test/script/basic/NASHORN-556.js
index 5cb164a0..1332d02b 100644
--- a/test/script/basic/NASHORN-556.js
+++ b/test/script/basic/NASHORN-556.js
@@ -47,7 +47,7 @@ function f1() {
   // (NoTypeArrayData)
   var empty = {};
   empty.length = 10;
-  Java.toJavaArray(empty);
+  Java.to(empty);
   delete empty[0];
   Array.prototype.slice.call(empty, 0, 1);
   Array.prototype.pop.call(empty);
@@ -63,7 +63,7 @@ function f1() {
 function f2() {
   // DeletedArrayFilter
   var deleted = [,1,,2,,3,,4,,];
-  assertEq(2, Java.toJavaArray(deleted)[3]);
+  assertEq(2, Java.to(deleted)[3]);
   assertEq(undefined, deleted.pop());
   assertEq(4, deleted.pop());
   deleted.unshift(5);
@@ -78,7 +78,7 @@ function f2() {
 function f3() {
   // DeletedRangeArrayFilter
   var delrange = [1,2,3,,,,,,,,,,];
-  Java.toJavaArray(delrange);
+  Java.to(delrange);
   delrange.unshift(4);
   p.apply(null, delrange);
   print(delrange.slice(1,3), delrange.slice(2,6));
@@ -88,7 +88,7 @@ function f3() {
 function f4() {
   // NumberArrayData
   var num = [1.1,2.2,3.3,4.4,5.5];
-  Java.toJavaArray(num);
+  Java.to(num);
   assertEq(2, num[3] >>> 1);
   assertEq(5, num[4] | 0);
   assertEq(5.5, num.pop());
@@ -104,7 +104,7 @@ function f4() {
 function f5() {
   // ObjectArrayData
   var obj = [2,"two",3.14,"pi",14,"fourteen"];
-  Java.toJavaArray(obj);
+  Java.to(obj);
   assertEq(-12.86, obj[2] - 16);
   assertEq(7, obj[4] >>> 1);
   obj.unshift("one");
@@ -131,14 +131,14 @@ function f6() {
   sparse.length = 1024*1024;
   sparse.push(sparse.length);
   delete sparse[sparse.length-1];
-  //print(Java.toJavaArray(sparse).length);
+  //print(Java.to(sparse).length);
   (function(){}).apply(null, sparse);
 }
 
 function f7() {
   // UndefinedArrayFilter
   var undef = [1,2,3,4,5,undefined,7,8,9,19];
-  Java.toJavaArray(undef);
+  Java.to(undef);
   assertEq(4, undef[8] >>> 1);
   var tmp = undef[9] >>> 1;
   undef[8] = tmp;
@@ -154,8 +154,8 @@ function f7() {
 
 function f8() {
   // LongArrayData
-  var j = Java.toJavaScriptArray(Java.toJavaArray([23,37,42,86,47], "long"));
-  Java.toJavaArray(j);
+  var j = Java.from(Java.to([23,37,42,86,47], "long[]"));
+  Java.to(j);
   p.apply(null, j);
   assertEq(43, j[3] >>> 1);
   assertEq(36, j[4] - 11);
@@ -164,12 +164,12 @@ function f8() {
   assertEq(7, j.shift());
   assertEq(47, j.pop());
   j.push("asdf");
-  j = Java.toJavaScriptArray(Java.toJavaArray([23,37,42,86,47], "long"));
+  j = Java.from(Java.to([23,37,42,86,47], "long[]"));
   j.length = 3;
   j[0] = 13;
-  j = Java.toJavaScriptArray(Java.toJavaArray([23,37,42,86,47], "long"));
+  j = Java.from(Java.to([23,37,42,86,47], "long[]"));
   delete j[0];
-  j = Java.toJavaScriptArray(Java.toJavaArray([23,37,42,86,47], "long"));
+  j = Java.from(Java.to([23,37,42,86,47], "long[]"));
   j.length = 20;
   j[0] = 13.37;
 }
diff --git a/test/script/basic/allgettersetters.js b/test/script/basic/allgettersetters.js
index 0f6753c2..1cb95623 100644
--- a/test/script/basic/allgettersetters.js
+++ b/test/script/basic/allgettersetters.js
@@ -34,6 +34,9 @@ function checkGetterSetter(obj, expectError) {
         for (var i in properties) {
             var prop = properties[i];
             try {
+                if (!/\d.*/.test(prop)) {
+                    eval("obj." + prop + " = " + "obj." + prop + ";");
+                }
                 obj[prop] = obj[prop];
             } catch (e) {
                 if (!expectError || !(e instanceof TypeError)) {
diff --git a/test/script/basic/compile-octane.js.EXPECTED b/test/script/basic/compile-octane.js.EXPECTED
index 39f866c2..153524c7 100644
--- a/test/script/basic/compile-octane.js.EXPECTED
+++ b/test/script/basic/compile-octane.js.EXPECTED
@@ -1,39 +1,13 @@
-Compiling... box2d.js
-Compiled OK: box2d.js
-
-Compiling... code-load.js
-Compiled OK: code-load.js
-
-Compiling... crypto.js
-Compiled OK: crypto.js
-
-Compiling... deltablue.js
-Compiled OK: deltablue.js
-
-Compiling... earley-boyer.js
-Compiled OK: earley-boyer.js
-
-Compiling... gbemu.js
-Compiled OK: gbemu.js
-
-Compiling... mandreel.js
-Compiled OK: mandreel.js
-
-Compiling... navier-stokes.js
-Compiled OK: navier-stokes.js
-
-Compiling... pdfjs.js
-Compiled OK: pdfjs.js
-
-Compiling... raytrace.js
-Compiled OK: raytrace.js
-
-Compiling... regexp.js
-Compiled OK: regexp.js
-
-Compiling... richards.js
-Compiled OK: richards.js
-
-Compiling... splay.js
-Compiled OK: splay.js
-
+Compiled OK: box2d
+Compiled OK: code-load
+Compiled OK: crypto
+Compiled OK: deltablue
+Compiled OK: earley-boyer
+Compiled OK: gbemu
+Compiled OK: mandreel
+Compiled OK: navier-stokes
+Compiled OK: pdfjs
+Compiled OK: raytrace
+Compiled OK: regexp
+Compiled OK: richards
+Compiled OK: splay
diff --git a/test/script/basic/javaarrayconversion.js b/test/script/basic/javaarrayconversion.js
index 34e2f95f..96ebe904 100644
--- a/test/script/basic/javaarrayconversion.js
+++ b/test/script/basic/javaarrayconversion.js
@@ -34,7 +34,7 @@ var x; // used for undefined
 var testCount = 0;
 
 function testF(inputValue, type, testFn) {
-  var x = Java.toJavaArray([inputValue], type)[0];
+  var x = Java.to([inputValue], type + "[]")[0];
   if(!testFn(x)) {
     throw ("unexpected value: " + x)
   }
@@ -130,7 +130,7 @@ test({ valueOf: function() { return "42"; },  toString: function() { return "43"
 
 function assertCantConvert(sourceType, targetType) {
   try {
-    Java.toJavaArray([new Java.type(sourceType)()], targetType)
+    Java.to([new Java.type(sourceType)()], targetType + "[]")
     throw "no TypeError encountered"
   } catch(e) {
       if(!(e instanceof TypeError)) {
@@ -164,7 +164,7 @@ var intArray = new (Java.type("int[]"))(3)
 intArray[0] = 1234;
 intArray[1] = 42;
 intArray[2] = 5;
-var jsIntArray = Java.toJavaScriptArray(intArray)
+var jsIntArray = Java.from(intArray)
 assert(jsIntArray instanceof Array);
 assert(jsIntArray[0] === 1234);
 assert(jsIntArray[1] === 42);
@@ -179,7 +179,7 @@ assert(intArray[2] === 6);
 var byteArray = new (Java.type("byte[]"))(2)
 byteArray[0] = -128;
 byteArray[1] = 127;
-var jsByteArray = Java.toJavaScriptArray(byteArray)
+var jsByteArray = Java.from(byteArray)
 assert(jsByteArray instanceof Array);
 assert(jsByteArray[0] === -128);
 assert(jsByteArray[1] === 127);
@@ -187,7 +187,7 @@ assert(jsByteArray[1] === 127);
 var shortArray = new (Java.type("short[]"))(2)
 shortArray[0] = -32768;
 shortArray[1] = 32767;
-var jsShortArray = Java.toJavaScriptArray(shortArray)
+var jsShortArray = Java.from(shortArray)
 assert(jsShortArray instanceof Array);
 assert(jsShortArray[0] === -32768);
 assert(jsShortArray[1] === 32767);
@@ -195,7 +195,7 @@ assert(jsShortArray[1] === 32767);
 var floatArray = new (Java.type("float[]"))(2)
 floatArray[0] = java.lang.Float.MIN_VALUE;
 floatArray[1] = java.lang.Float.MAX_VALUE;
-var jsFloatArray = Java.toJavaScriptArray(floatArray)
+var jsFloatArray = Java.from(floatArray)
 assert(jsFloatArray instanceof Array);
 assert(jsFloatArray[0] == java.lang.Float.MIN_VALUE);
 assert(jsFloatArray[1] == java.lang.Float.MAX_VALUE);
@@ -204,7 +204,7 @@ var charArray = new (Java.type("char[]"))(3)
 charArray[0] = "a";
 charArray[1] = "b";
 charArray[2] = "1";
-var jsCharArray = Java.toJavaScriptArray(charArray)
+var jsCharArray = Java.from(charArray)
 assert(jsCharArray instanceof Array);
 assert(jsCharArray[0] === 97);
 assert(jsCharArray[1] === 98);
@@ -213,7 +213,7 @@ assert(jsCharArray[2] === 49);
 var booleanArray = new (Java.type("boolean[]"))(2)
 booleanArray[0] = true;
 booleanArray[1] = false;
-var jsBooleanArray = Java.toJavaScriptArray(booleanArray)
+var jsBooleanArray = Java.from(booleanArray)
 assert(jsBooleanArray instanceof Array);
 assert(jsBooleanArray[0] === true);
 assert(jsBooleanArray[1] === false);
diff --git a/test/script/basic/ranges_disabled.js b/test/script/basic/ranges_disabled.js
new file mode 100644
index 00000000..5bc8846e
--- /dev/null
+++ b/test/script/basic/ranges_disabled.js
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * range analysis test. check that computation return values are correct
+ * both with and without range analysis
+ *
+ * @test 
+ * @run 
+ */
+
+load(__DIR__ + "ranges_payload.js");
diff --git a/test/script/basic/ranges_disabled.js.EXPECTED b/test/script/basic/ranges_disabled.js.EXPECTED
new file mode 100644
index 00000000..1a99c91b
--- /dev/null
+++ b/test/script/basic/ranges_disabled.js.EXPECTED
@@ -0,0 +1,4 @@
+289
+11094405
+4294967293
+-4722
diff --git a/test/script/basic/ranges_enabled.js b/test/script/basic/ranges_enabled.js
new file mode 100644
index 00000000..45d9efb0
--- /dev/null
+++ b/test/script/basic/ranges_enabled.js
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * range analysis test. check that computation return values are correct
+ * both with and without range analysis
+ *
+ * @test
+ * @option --range-analysis
+ * @run 
+ */
+
+load(__DIR__ + "ranges_payload.js");
diff --git a/test/script/basic/ranges_enabled.js.EXPECTED b/test/script/basic/ranges_enabled.js.EXPECTED
new file mode 100644
index 00000000..1a99c91b
--- /dev/null
+++ b/test/script/basic/ranges_enabled.js.EXPECTED
@@ -0,0 +1,4 @@
+289
+11094405
+4294967293
+-4722
diff --git a/test/script/basic/ranges_payload.js b/test/script/basic/ranges_payload.js
new file mode 100644
index 00000000..f10a4a28
--- /dev/null
+++ b/test/script/basic/ranges_payload.js
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ * 
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ * 
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ * 
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ * 
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * range analysis test. check that computation return values are correct
+ * both with and without range analysis
+ *
+ * @subtest
+ */
+
+function f(c) {
+    var v = c & 0xffff;
+    var w = v & 0xfff;
+    var x = v * w;
+    return x;
+}
+
+function g() {
+    var sum = 0;
+    for (var x = 0; x < 4711; x++) {
+	sum += x;
+    }
+    return sum;
+}
+
+function g2() {
+    var sum = 0;
+    //make sure we overflow
+    var displacement = 0x7ffffffe;
+    for (var x = displacement; x < (displacement + 2); x++) {
+	sum += x;
+    }
+    return sum;
+}
+
+//mostly provide code coverage for all the range operations    
+function h() {
+    var sum = 0;
+    sum += 4711;
+    sum &= 0xffff;
+    sum /= 2;
+    sum *= 2;
+    sum -= 4;
+    sum |= 2;
+    sum ^= 17;
+    sum = sum % 10000;
+    sum = -sum;
+    return sum
+}
+
+print(f(17));
+print(g());
+print(g2());
+print(h());
diff --git a/test/script/basic/run-octane.js b/test/script/basic/run-octane.js
index 315451cb..b730040e 100644
--- a/test/script/basic/run-octane.js
+++ b/test/script/basic/run-octane.js
@@ -26,36 +26,20 @@
  */
 
 var tests = [
-    "box2d.js",
-    "code-load.js",
-    "crypto.js", 
-    "deltablue.js", 
-    "earley-boyer.js", 
-    "gbemu.js",
-    "mandreel.js",
-    "navier-stokes.js", 
-    "pdfjs.js",
-    "raytrace.js",
-    "regexp.js", 
-    "richards.js", 
-    "splay.js" 
+    {file:"box2d",suite:"Box2DBenchmark"},
+    {file:"code-load",suite:"CodeLoad"},
+    {file:"crypto",suite:"Crypto"},
+    {file:"deltablue",suite:"DeltaBlue"},
+    {file:"earley-boyer", suite:"EarleyBoyer"},
+    {file:"gbemu", suite:"GameboyBenchmark"},
+    {file:"mandreel", suite:"MandreelBenchmark"},
+    {file:"navier-stokes", suite:"NavierStokes"},
+    {file:"pdfjs", suite:"PdfJS"},
+    {file:"raytrace", suite:"RayTrace"},
+    {file:"regexp", suite:"RegExpSuite"},
+    {file:"richards", suite:"Richards"},
+    {file:"splay", suite:"Splay"}
 ];
-
-// hack, teardown breaks things defined in the global space, making it impossible
-// to do multiple consecutive benchmark runs with the same harness. I think it's a bug
-// that the setup and teardown aren't each others constructor and destructor but rather
-// that the benchmarks rely on partial global state. For shame, Octane! 
-var ignoreTeardown = [
-    { name: "box2d.js" },
-    { name: "gbemu.js" },
-];
-
-
-//TODO mandreel can be compiled as a test, but not run multiple times unless modified to not have global state
-var compileOnly = {
-    "mandreel.js" : true
-};
-
 var dir = (typeof(__DIR__) == 'undefined') ? "test/script/basic/" : __DIR__;
 
 // TODO: why is this path hard coded when it's defined in project properties?
@@ -71,110 +55,106 @@ function endsWith(str, suffix) {
 }
 
 function should_compile_only(name) {
-    return (typeof compile_only !== 'undefined') || compileOnly[name] === true;
+    return (typeof compile_only !== 'undefined')
 }
 
 function run_one_benchmark(arg, iters) {
-
     var file_name;
-    var file = arg.split('/');
-    if (file.length == 1) {
-        file = arg.split('\\');
-    }    
-
-    //trim off trailing path separators
-    while (file[file.length - 1].indexOf(".js") == -1) {
-	file.pop();
-    }
-    file_name = file[file.length - 1];
-
+    var file = (arg.file + ".js").split('/');
+    
+    file_name = path + file[file.length - 1];
+    
     var compile_and_return = should_compile_only(file_name);
     if (compile_and_return) {
 	if (typeof compile_only === 'undefined') { //for a run, skip compile onlies, don't even compile them
 	    return;
 	}
-	print("Compiling... " + file_name);
     }
-
-    load(path + 'base.js');
-    load(arg);
+    
+    print_verbose("Loading... " + file_name);
+    load(file_name);
     
     if (compile_and_return) {
-	print("Compiled OK: " + file_name);
-	print("");
+	print_always("Compiled OK: " + arg.file);
 	return;
     }
     
     var success = true;
-    var hiscore = 0;
-    var loscore = 10e8;
     var current_name;
     
-    function PrintResult(name, result) {
-	current_name = name;
-    }
-        
-    function PrintError(name, error) {
-	current_name = name;
-	PrintResult(name, error);
-	success = false;
-    }
-        
-    function PrintScore(score) {
-	if (success) {
-	    if (+score >= hiscore) {
-		hiscore = +score;
-	    }
-	    if (+score <= loscore) {
-		loscore = +score;
-	    }
-	}
-
-	if (verbose) {
-	    print("Score: " + score);
-	}
-    }
-    
     if (iters == undefined) {
 	iters = numberOfIterations;
     } else {
 	numberOfIterations = iters;
     }
+    
+    var benchmarks = eval(arg.suite + ".benchmarks");
+    var min_score  = 1e9;
+    var max_score  = 0;
+    var mean_score = 0;
+
+    try {
+	for (var x = 0; x < benchmarks.length ; x++) { 
+	    benchmarks[x].Setup();
+	}
+	print_verbose("Running '" + arg.file + "' for " + iters + " iterations of no less than " + min_time + " seconds (" + runtime + ")");
+	
+	var scores = [];
+	
+	var min_time_ms = min_time * 1000;
+	var len = benchmarks.length;    
+	
+	for (var it = 0; it < iters + 1; it++) {
+	    //every iteration must take a minimum of 10 secs
+	    var ops = 0;
+	    var elapsed = 0;
+	    var start = new Date;
+	    do {
+		for (var i = 0; i < len; i++) {
+		    benchmarks[i].run();
+		}	    
+		ops += len;
+		elapsed = new Date - start;
+	    } while (elapsed < min_time * 1000);
+	    
+	    var score = ops / elapsed * 1000 * 60;
+	    scores.push(score);
+	    var name = it == 0 ? "warmup" : "iteration " + it;   
+	    print_verbose("[" + arg.file + "] " + name + " finished " + score.toFixed(0) + " ops/minute");
+	}
 
-    print(runtime + ": running " + file_name + "...");
+	for (var x = 0; x < benchmarks.length ; x++) { 
+	    benchmarks[x].TearDown();
+	}
 
-    for (var i = 0; i < numberOfIterations; i++) {
-	var callbacks =
-	    { NotifyResult: PrintResult,
-	      NotifyError: PrintError,
-	      NotifyScore: PrintScore };	
+	for (var x = 1; x < iters + 1 ; x++) {
+	    mean_score += scores[x];
+	    min_score = Math.min(min_score, scores[x]);
+	    max_score = Math.max(max_score, scores[x]);
+	}
+	mean_score /= iters;    
 
-	for (j in ignoreTeardown) {
-	    var ignore = ignoreTeardown[j];
-	    if (endsWith(arg, ignore.name)) {
-		var teardownOverride = ignore.teardown;
-		if (!teardownOverride) {
-		    teardownOverride = function() {};
-		}
+    } catch (e) {
+	print_always("*** Aborted and setting score to zero. Reason: " + e);
+	mean_score = min_score = max_score = 0;
+	scores = [0];
+    }
 
-		for (k in BenchmarkSuite.suites) {
-		    var benchmarks = BenchmarkSuite.suites[k].benchmarks;
-		    for (l in benchmarks) {
-			benchmarks[l].TearDown = teardownOverride;
-		    }
-                }
-		break;
-	    }
-	}
-	
-	BenchmarkSuite.RunSuites(callbacks);
+    var res = "[" + arg.file + "] " + mean_score.toFixed(0);
+    if (verbose) {
+	res += " ops/minute (" + min_score.toFixed(0) + "-" + max_score.toFixed(0) + "), warmup=" + scores[0].toFixed(0);
+    }
+    print_always(res);
+}
+
+function print_always(x) {
+    print(x);
+}
+
+function print_verbose(x) {
+    if (verbose) {
+	print(x);
     }
-    
-    var start = "Score: ";
-    if (runtime != "") {
-	start = runtime + ": ";
-    } 
-    print(start + current_name + ' (version ' + BenchmarkSuite.version + '): ' + loscore + '-' + hiscore);
 }
 
 function run_suite(tests, iters) {
@@ -186,6 +166,7 @@ function run_suite(tests, iters) {
 runtime = "command line";
 
 var args = [];
+
 if (typeof $ARGS !== 'undefined') {
     args = $ARGS;
 } else if (typeof arguments !== 'undefined' && arguments.length != 0) {
@@ -211,6 +192,7 @@ if (new_args.length != 0) {
 
 var tests_found = [];
 var iters = undefined;
+var min_time = 5;
 
 for (var i = 0; i < args.length; i++) { 
     arg = args[i];
@@ -220,21 +202,41 @@ for (var i = 0; i < args.length; i++) {
 	runtime = args[++i];
     } else if (arg == "--verbose") {
 	verbose = true;
+    } else if (arg == "--min-time") {
+	min_time = +args[++i];
     } else if (arg == "") {
 	continue; //skip
     } else {
-	tests_found.push(arg);
+	var found = false;
+	for (j in tests) {
+	    if (tests[j].file === arg) {
+		tests_found.push(tests[j]);
+		found = true;
+		break;
+	    }
+	}
+	if (!found) {
+	    var str = "unknown test name: '" + arg + "' -- valid names are: ";
+	    for (j in tests) {
+		if (j != 0) {
+		    str += ", ";
+		}
+		str += "'" + tests[j].file + "'";
+	    }
+	    throw str;
+	}
     }
 }
 
 if (tests_found.length == 0) {    
     for (i in tests) {
-	tests_found.push(path + tests[i]);
+	tests_found.push(tests[i]);
     }
 } 
 
 tests_found.sort();
 
+load(path + 'base.js');
 run_suite(tests_found, iters);
 
 
diff --git a/test/script/currently-failing/logcoverage.js b/test/script/currently-failing/logcoverage.js
index 18b16aa1..2d8d410a 100644
--- a/test/script/currently-failing/logcoverage.js
+++ b/test/script/currently-failing/logcoverage.js
@@ -53,8 +53,7 @@ function runScriptEngine(opts, name) {
             // set new standard err
             System.setErr(newErr);
             System.setOut(newOut);
-            var strType = Java.type("java.lang.String");
-            var engine = fac.getScriptEngine(Java.toJavaArray(opts, strType));
+            var engine = fac.getScriptEngine(Java.to(opts, "java.lang.String[]"));
 	    var reader = new java.io.FileReader(name);
             engine.eval(reader);
             newErr.flush();
diff --git a/test/script/trusted/NASHORN-638.js b/test/script/trusted/NASHORN-638.js
index 9cb6d694..1ff789a9 100644
--- a/test/script/trusted/NASHORN-638.js
+++ b/test/script/trusted/NASHORN-638.js
@@ -47,8 +47,7 @@ function runScriptEngine(opts, code) {
         try {
             // set new standard err
             System.setErr(newErr);
-            var strType = Java.type("java.lang.String");
-            var engine = fac.getScriptEngine(Java.toJavaArray(opts, strType));
+            var engine = fac.getScriptEngine(Java.to(opts, "java.lang.String[]"));
             engine.eval(code);
             newErr.flush();
             return new java.lang.String(baos.toByteArray());
diff --git a/test/script/trusted/NASHORN-653.js b/test/script/trusted/NASHORN-653.js
index 2084bf70..14a2cbc4 100644
--- a/test/script/trusted/NASHORN-653.js
+++ b/test/script/trusted/NASHORN-653.js
@@ -85,8 +85,7 @@ function runScriptEngine(opts, code) {
         try {
             // set new standard err
             System.setErr(newErr);
-            var strType = Java.type("java.lang.String");
-            var engine = fac.getScriptEngine(Java.toJavaArray(opts, strType));
+            var engine = fac.getScriptEngine(Java.to(opts, "java.lang.String[]"));
             engine.eval(code);
             newErr.flush();
             return new java.lang.String(baos.toByteArray());
diff --git a/test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java b/test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java
index d12c9057..a6c015a1 100644
--- a/test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java
+++ b/test/src/jdk/nashorn/api/scripting/ScriptEngineTest.java
@@ -47,7 +47,6 @@ import javax.script.ScriptEngineFactory;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import javax.script.SimpleScriptContext;
-import netscape.javascript.JSObject;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 
diff --git a/test/src/jdk/nashorn/internal/runtime/regexp/JdkRegExpTest.java b/test/src/jdk/nashorn/internal/runtime/regexp/JdkRegExpTest.java
new file mode 100644
index 00000000..c22838fb
--- /dev/null
+++ b/test/src/jdk/nashorn/internal/runtime/regexp/JdkRegExpTest.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.nashorn.internal.runtime.regexp;
+
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertNotNull;
+import static org.testng.Assert.assertTrue;
+
+import jdk.nashorn.internal.runtime.ParserException;
+import org.testng.annotations.Test;
+
+/**
+ * Basic tests for the JDK based RegExp implementation.
+ *
+ * @test
+ * @run testng jdk.nashorn.internal.runtime.regexp.JdkRegExpTest
+ */
+public class JdkRegExpTest {
+
+    /**
+     * Compile a regular expression using the JDK implementation
+     */
+    @Test
+    public void testMatcher() {
+        RegExp regexp = new RegExpFactory().compile("f(o)o", "");
+        RegExpMatcher matcher = regexp.match("foo");
+        assertNotNull(matcher);
+        assertTrue(matcher.search(0));
+        assertEquals(matcher.getInput(), "foo");
+        assertEquals(matcher.groupCount(), 1);
+        assertEquals(matcher.group(), "foo");
+        assertEquals(matcher.start(), 0);
+        assertEquals(matcher.end(), 3);
+        assertEquals(matcher.group(1), "o");
+        assertEquals(matcher.start(1), 1);
+        assertEquals(matcher.end(1), 2);
+    }
+}
diff --git a/src/jdk/nashorn/internal/runtime/options/ValueOption.java b/test/src/jdk/nashorn/internal/runtime/regexp/joni/JoniTest.java
index 2f4461f4..a6981c8d 100644
--- a/src/jdk/nashorn/internal/runtime/options/ValueOption.java
+++ b/test/src/jdk/nashorn/internal/runtime/regexp/joni/JoniTest.java
@@ -23,37 +23,30 @@
  * questions.
  */
 
-package jdk.nashorn.internal.runtime.options;
+package jdk.nashorn.internal.runtime.regexp.joni;
 
-import java.util.Collection;
-import java.util.Collections;
-import java.util.LinkedHashSet;
-import java.util.StringTokenizer;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertTrue;
+
+import org.testng.annotations.Test;
 
 /**
- * This option represents a collection of comma separated values
+ * Joni coverage tests
+ *
+ * @test
+ * @run testng jdk.nashorn.internal.runtime.regexp.joni.JoniTest
  */
-public class ValueOption extends Option<String> {
-
-    private Collection<String> values;
+public class JoniTest {
 
-    ValueOption(final String value) {
-        super(value);
-        if (value != null) {
-            values = new LinkedHashSet<>();
-            final StringTokenizer st = new StringTokenizer(getValue(), ",");
-            while (st.hasMoreElements()) {
-                values.add(st.nextToken());
-            }
-        }
+    @Test
+    public void testDump() {
+        new Regex("^a{3,}(.*)[z]++\\s\\1x$").dumpTree();
+        new Regex("^a{3,}(.*)[z]++\\s\\1x$").dumpByteCode();
+        new Regex("(abc){4,}{2,5}").dumpTree();
+        new Regex("(abc){4,}{2,5}").dumpByteCode();
+        new Regex("aaa|aa|bbbb|ccc").dumpTree();
+        new Regex("aaa|aa|bbbb|ccc").dumpByteCode();
+        new Regex("(?:ZFVR.(\\d+\\.\\d+))|(?:(?:Sversbk|TenaCnenqvfb|Vprjrnfry).(\\d+\\.\\d+))|(?:Bcren.(\\d+\\.\\d+))|(?:NccyrJroXvg.(\\d+(?:\\.\\d+)?))").dumpTree();
+        new Regex("(?:ZFVR.(\\d+\\.\\d+))|(?:(?:Sversbk|TenaCnenqvfb|Vprjrnfry).(\\d+\\.\\d+))|(?:Bcren.(\\d+\\.\\d+))|(?:NccyrJroXvg.(\\d+(?:\\.\\d+)?))").dumpByteCode();
     }
-
-    /**
-     * Get the values in the option
-     * @return collection of strings
-     */
-    public Collection<String> getValues() {
-        return Collections.unmodifiableCollection(values);
-    }
-
 }