| /* |
| * Copyright (c) 2011, 2015, 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.nodes.extended; |
| |
| import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; |
| |
| import org.graalvm.compiler.core.common.type.ObjectStamp; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| import org.graalvm.compiler.core.common.type.TypeReference; |
| 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.ValueNode; |
| import org.graalvm.compiler.nodes.calc.FloatingNode; |
| import org.graalvm.compiler.nodes.spi.Lowerable; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.nodes.spi.StampProvider; |
| import org.graalvm.compiler.nodes.spi.Virtualizable; |
| import org.graalvm.compiler.nodes.spi.VirtualizerTool; |
| import org.graalvm.compiler.nodes.type.StampTool; |
| |
| import jdk.vm.ci.meta.ConstantReflectionProvider; |
| import jdk.vm.ci.meta.MetaAccessProvider; |
| |
| /** |
| * Loads an object's hub. The object is not null-checked by this operation. |
| */ |
| @NodeInfo(cycles = CYCLES_2, size = SIZE_1) |
| public final class LoadHubNode extends FloatingNode implements Lowerable, Canonicalizable, Virtualizable { |
| |
| public static final NodeClass<LoadHubNode> TYPE = NodeClass.create(LoadHubNode.class); |
| @Input ValueNode value; |
| |
| public ValueNode getValue() { |
| return value; |
| } |
| |
| private static Stamp hubStamp(StampProvider stampProvider, ValueNode value) { |
| assert value.stamp() instanceof ObjectStamp; |
| return stampProvider.createHubStamp(((ObjectStamp) value.stamp())); |
| } |
| |
| public static ValueNode create(ValueNode value, StampProvider stampProvider, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) { |
| Stamp stamp = hubStamp(stampProvider, value); |
| ValueNode synonym = findSynonym(value, stamp, metaAccess, constantReflection); |
| if (synonym != null) { |
| return synonym; |
| } |
| return new LoadHubNode(stamp, value); |
| } |
| |
| public LoadHubNode(@InjectedNodeParameter StampProvider stampProvider, ValueNode value) { |
| this(hubStamp(stampProvider, value), value); |
| } |
| |
| public LoadHubNode(Stamp stamp, ValueNode value) { |
| super(TYPE, stamp); |
| this.value = value; |
| } |
| |
| @Override |
| public void lower(LoweringTool tool) { |
| tool.getLowerer().lower(this, tool); |
| } |
| |
| @Override |
| public ValueNode canonical(CanonicalizerTool tool) { |
| if (!GeneratePIC.getValue()) { |
| MetaAccessProvider metaAccess = tool.getMetaAccess(); |
| ValueNode curValue = getValue(); |
| ValueNode newNode = findSynonym(curValue, stamp(), metaAccess, tool.getConstantReflection()); |
| if (newNode != null) { |
| return newNode; |
| } |
| } |
| return this; |
| } |
| |
| public static ValueNode findSynonym(ValueNode curValue, Stamp stamp, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) { |
| if (!GeneratePIC.getValue()) { |
| TypeReference type = StampTool.typeReferenceOrNull(curValue); |
| if (type != null && type.isExact()) { |
| return ConstantNode.forConstant(stamp, constantReflection.asObjectHub(type.getType()), metaAccess); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public void virtualize(VirtualizerTool tool) { |
| if (!GeneratePIC.getValue()) { |
| ValueNode alias = tool.getAlias(getValue()); |
| TypeReference type = StampTool.typeReferenceOrNull(alias); |
| if (type != null && type.isExact()) { |
| tool.replaceWithValue(ConstantNode.forConstant(stamp(), tool.getConstantReflectionProvider().asObjectHub(type.getType()), tool.getMetaAccessProvider(), graph())); |
| } |
| } |
| } |
| } |