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Diffstat (limited to 'src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java')
-rw-r--r-- | src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java b/src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java deleted file mode 100644 index e689820f..00000000 --- a/src/jdk/nashorn/internal/codegen/SplitMethodEmitter.java +++ /dev/null @@ -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; - } -} |