001/*
002 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.replacements;
024
025import jdk.internal.jvmci.hotspot.*;
026import jdk.internal.jvmci.meta.*;
027import static com.oracle.graal.compiler.common.GraalOptions.*;
028
029import com.oracle.graal.graph.*;
030import com.oracle.graal.nodeinfo.*;
031import com.oracle.graal.nodes.CallTargetNode.InvokeKind;
032import com.oracle.graal.nodes.*;
033import com.oracle.graal.replacements.nodes.*;
034
035@NodeInfo
036public final class IdentityHashCodeNode extends PureFunctionMacroNode {
037
038    public static final NodeClass<IdentityHashCodeNode> TYPE = NodeClass.create(IdentityHashCodeNode.class);
039
040    public IdentityHashCodeNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, JavaType returnType, ValueNode object) {
041        super(TYPE, invokeKind, targetMethod, bci, returnType, object);
042    }
043
044    @Override
045    protected JavaConstant evaluate(JavaConstant param, MetaAccessProvider metaAccess) {
046        if (ImmutableCode.getValue() || param.isNull()) {
047            return null;
048        }
049        HotSpotObjectConstant c = (HotSpotObjectConstant) param;
050        return JavaConstant.forInt(c.getIdentityHashCode());
051    }
052}