VirtualizableInvokeMacroNode.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.replacements.nodes;
24
25import org.graalvm.compiler.core.common.type.StampPair;
26import org.graalvm.compiler.graph.NodeClass;
27import org.graalvm.compiler.nodeinfo.NodeInfo;
28import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind;
29import org.graalvm.compiler.nodes.ValueNode;
30import org.graalvm.compiler.nodes.spi.Virtualizable;
31import org.graalvm.compiler.nodes.spi.VirtualizerTool;
32import org.graalvm.compiler.nodes.virtual.VirtualObjectNode;
33
34import jdk.vm.ci.meta.ResolvedJavaMethod;
35
36/**
37 * A helper class to allow elimination of byte code instrumentation that could interfere with escape
38 * analysis.
39 */
40@NodeInfo
41public class VirtualizableInvokeMacroNode extends MacroStateSplitNode implements Virtualizable {
42
43    public static final NodeClass<VirtualizableInvokeMacroNode> TYPE = NodeClass.create(VirtualizableInvokeMacroNode.class);
44
45    public VirtualizableInvokeMacroNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, StampPair returnStamp, ValueNode... arguments) {
46        super(TYPE, invokeKind, targetMethod, bci, returnStamp, arguments);
47    }
48
49    @Override
50    public void virtualize(VirtualizerTool tool) {
51        for (ValueNode arg : arguments) {
52            ValueNode alias = tool.getAlias(arg);
53            if (alias instanceof VirtualObjectNode) {
54                tool.delete();
55            }
56        }
57    }
58}
59