| /* |
| * Copyright (c) 2016, 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. |
| */ |
| |
| |
| package org.graalvm.compiler.hotspot.replacements; |
| |
| import static org.graalvm.compiler.core.common.GraalOptions.ImmutableCode; |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0; |
| |
| import org.graalvm.compiler.core.common.type.AbstractObjectStamp; |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.graph.spi.Canonicalizable; |
| import org.graalvm.compiler.graph.spi.CanonicalizerTool; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.FixedWithNextNode; |
| import org.graalvm.compiler.nodes.NodeView; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.memory.MemoryCheckpoint; |
| import org.graalvm.compiler.nodes.spi.Lowerable; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import jdk.internal.vm.compiler.word.LocationIdentity; |
| |
| import jdk.vm.ci.hotspot.HotSpotObjectConstant; |
| import jdk.vm.ci.meta.JavaConstant; |
| |
| @NodeInfo(cycles = CYCLES_0, size = SIZE_0) |
| public class IdentityHashCodeNode extends FixedWithNextNode implements Canonicalizable, Lowerable, MemoryCheckpoint.Single { |
| |
| public static final NodeClass<IdentityHashCodeNode> TYPE = NodeClass.create(IdentityHashCodeNode.class); |
| |
| @Input ValueNode object; |
| |
| public IdentityHashCodeNode(ValueNode object) { |
| super(TYPE, StampFactory.forInteger(32)); |
| this.object = object; |
| |
| } |
| |
| @Override |
| public LocationIdentity getLocationIdentity() { |
| return HotSpotReplacementsUtil.MARK_WORD_LOCATION; |
| } |
| |
| @Override |
| public Node canonical(CanonicalizerTool tool) { |
| if (object.isConstant()) { |
| assert object.stamp(NodeView.DEFAULT) instanceof AbstractObjectStamp; |
| JavaConstant c = (JavaConstant) object.asConstant(); |
| if (ImmutableCode.getValue(tool.getOptions())) { |
| return this; |
| } |
| JavaConstant identityHashCode = null; |
| if (c.isNull()) { |
| identityHashCode = JavaConstant.forInt(0); |
| } else { |
| identityHashCode = JavaConstant.forInt(((HotSpotObjectConstant) c).getIdentityHashCode()); |
| } |
| |
| return new ConstantNode(identityHashCode, StampFactory.forConstant(identityHashCode)); |
| } |
| return this; |
| } |
| |
| @Override |
| public void lower(LoweringTool tool) { |
| tool.getLowerer().lower(this, tool); |
| } |
| |
| @NodeIntrinsic |
| public static native int identityHashCode(Object object); |
| |
| } |