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Diffstat (limited to 'src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java')
-rw-r--r--src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java100
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diff --git a/src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java b/src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java
deleted file mode 100644
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--- a/src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java
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@@ -1,100 +0,0 @@
-/*
- * 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.ArrayList;
-import java.util.List;
-
-import static jdk.nashorn.internal.codegen.CompilerConstants.SCOPE;
-
-import jdk.internal.org.objectweb.asm.MethodVisitor;
-import jdk.nashorn.internal.codegen.types.Type;
-import jdk.nashorn.internal.ir.LexicalContext;
-import jdk.nashorn.internal.ir.SplitNode;
-import jdk.nashorn.internal.runtime.Scope;
-
-/**
- * Emitter used for splitting methods. Needs to keep track of if there are jump targets
- * outside the current split node. All external jump targets encountered at method
- * emission are logged, and {@code CodeGenerator#leaveSplitNode(SplitNode)} creates
- * an appropriate jump table when the SplitNode has been iterated through
- */
-public class SplitMethodEmitter extends MethodEmitter {
-
- private final SplitNode splitNode;
-
- private final List<Label> externalTargets = new ArrayList<>();
-
- SplitMethodEmitter(final ClassEmitter classEmitter, final MethodVisitor mv, SplitNode splitNode) {
- super(classEmitter, mv);
- this.splitNode = splitNode;
- }
-
- @Override
- void splitAwareGoto(final LexicalContext lc, final Label label) {
- assert splitNode != null;
- final int index = findExternalTarget(lc, label);
- if (index >= 0) {
- loadCompilerConstant(SCOPE);
- checkcast(Scope.class);
- load(index + 1);
- invoke(Scope.SET_SPLIT_STATE);
- loadUndefined(Type.OBJECT);
- _return(functionNode.getReturnType());
- return;
- }
- super.splitAwareGoto(lc, label);
- }
-
- private int findExternalTarget(final LexicalContext lc, final Label label) {
- final int index = externalTargets.indexOf(label);
-
- if (index >= 0) {
- return index;
- }
-
- if (lc.isExternalTarget(splitNode, label)) {
- externalTargets.add(label);
- return externalTargets.size() - 1;
- }
- return -1;
- }
-
- @Override
- MethodEmitter registerReturn() {
- setHasReturn();
- loadCompilerConstant(SCOPE);
- checkcast(Scope.class);
- load(0);
- invoke(Scope.SET_SPLIT_STATE);
- return this;
- }
-
- @Override
- final List<Label> getExternalTargets() {
- return externalTargets;
- }
-}