Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/ObjectCloneNode.java @ 7765:f20c2b1f5289
fix for Object.clone virtualization
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 11 Feb 2013 10:44:40 +0100 |
parents | cff55cdeea48 |
children | ace410a10aca |
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/* * Copyright (c) 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. * * 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 com.oracle.graal.hotspot.snippets; import java.lang.reflect.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.debug.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.nodes.virtual.*; import com.oracle.graal.phases.*; import com.oracle.graal.phases.common.*; import com.oracle.graal.snippets.nodes.*; public class ObjectCloneNode extends MacroNode implements VirtualizableAllocation, ArrayLengthProvider { public ObjectCloneNode(Invoke invoke) { super(invoke); } @Override public boolean inferStamp() { return updateStamp(getObject().stamp()); } private ValueNode getObject() { return arguments.get(0); } private Method selectSnippetMethod(LoweringTool tool) { ResolvedJavaType type = getObject().objectStamp().type(); if (type.isArray()) { return ObjectCloneSnippets.arrayCloneMethod; } else if (type.isAssignableFrom(tool.getRuntime().lookupJavaType(Object[].class))) { // arrays are assignable to Object, Cloneable and Serializable return ObjectCloneSnippets.genericCloneMethod; } else { return ObjectCloneSnippets.instanceCloneMethod; } } @Override public void lower(LoweringTool tool) { if (!GraalOptions.IntrinsifyObjectClone) { super.lower(tool); return; } ResolvedJavaMethod snippetMethod = tool.getRuntime().lookupJavaMethod(selectSnippetMethod(tool)); if (Debug.isLogEnabled()) { Debug.log("%s > Intrinsify (%s)", Debug.currentScope(), snippetMethod.getSignature().getParameterType(0, snippetMethod.getDeclaringClass()).getComponentType()); } StructuredGraph snippetGraph = (StructuredGraph) snippetMethod.getCompilerStorage().get(Graph.class); assert snippetGraph != null : "ObjectCloneSnippets should be installed"; InvokeNode invoke = replaceWithInvoke(); InliningUtil.inline(invoke, snippetGraph, false); } private static boolean isCloneableType(ResolvedJavaType type, MetaAccessProvider metaAccess) { return metaAccess.lookupJavaType(Cloneable.class).isAssignableFrom(type); } private static ResolvedJavaType getConcreteType(ObjectStamp stamp, Assumptions assumptions) { if (stamp.isExactType()) { return stamp.type(); } else { ResolvedJavaType type = stamp.type().findUniqueConcreteSubtype(); if (type != null) { assumptions.recordConcreteSubtype(stamp.type(), type); } return type; } } @Override public void virtualize(VirtualizerTool tool) { State originalState = tool.getObjectState(getObject()); if (originalState != null && originalState.getState() == EscapeState.Virtual) { VirtualObjectNode originalVirtual = originalState.getVirtualObject(); if (isCloneableType(originalVirtual.type(), tool.getMetaAccessProvider())) { ValueNode[] newEntryState = new ValueNode[originalVirtual.entryCount()]; for (int i = 0; i < newEntryState.length; i++) { newEntryState[i] = originalState.getEntry(i); } VirtualObjectNode newVirtual = originalVirtual.duplicate(); tool.createVirtualObject(newVirtual, newEntryState, 0); tool.replaceWithVirtual(newVirtual); } } else { ValueNode obj; if (originalState != null) { obj = originalState.getMaterializedValue(); } else { obj = tool.getReplacedValue(getObject()); } ResolvedJavaType type = getConcreteType(obj.objectStamp(), tool.getAssumptions()); if (isCloneableType(type, tool.getMetaAccessProvider())) { if (!type.isArray()) { ResolvedJavaField[] fields = type.getInstanceFields(true); ValueNode[] state = new ValueNode[fields.length]; final LoadFieldNode[] loads = new LoadFieldNode[fields.length]; for (int i = 0; i < fields.length; i++) { state[i] = loads[i] = graph().add(new LoadFieldNode(obj, fields[i])); } VirtualObjectNode newVirtual = new VirtualInstanceNode(type, fields); final StructuredGraph structuredGraph = (StructuredGraph) graph(); tool.customAction(new Runnable() { public void run() { for (LoadFieldNode load : loads) { structuredGraph.addBeforeFixed(ObjectCloneNode.this, load); } } }); tool.createVirtualObject(newVirtual, state, 0); tool.replaceWithVirtual(newVirtual); } } } } @Override public ValueNode length() { if (getObject() instanceof ArrayLengthProvider) { return ((ArrayLengthProvider) getObject()).length(); } else { return null; } } }