Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/ObjectCloneNode.java @ 15260:61363577a184
Move static helpers from ObjectStamp to StampTool.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Tue, 22 Apr 2014 14:15:24 +0200 |
parents | 2c0cfbf454b5 |
children | 77783d8a45ef |
line wrap: on
line source
/* * 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.replacements; import static com.oracle.graal.compiler.GraalCompiler.*; import java.lang.reflect.*; import java.util.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.debug.*; import com.oracle.graal.debug.Debug.Scope; 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.replacements.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); } @Override protected StructuredGraph getLoweredSnippetGraph(LoweringTool tool) { if (!shouldIntrinsify(getTargetMethod())) { return null; } ResolvedJavaType type = StampTool.typeOrNull(getObject()); if (type != null) { if (type.isArray()) { Method method = ObjectCloneSnippets.arrayCloneMethods.get(type.getComponentType().getKind()); if (method != null) { final ResolvedJavaMethod snippetMethod = tool.getMetaAccess().lookupJavaMethod(method); final Replacements replacements = tool.getReplacements(); StructuredGraph snippetGraph = null; try (Scope s = Debug.scope("ArrayCopySnippet", snippetMethod)) { snippetGraph = replacements.getSnippet(snippetMethod); } catch (Throwable e) { throw Debug.handle(e); } assert snippetGraph != null : "ObjectCloneSnippets should be installed"; return lowerReplacement(snippetGraph.copy(), tool); } } else { type = getConcreteType(getObject().stamp(), tool.assumptions(), tool.getMetaAccess()); if (type != null) { StructuredGraph newGraph = new StructuredGraph(); ParameterNode param = newGraph.unique(new ParameterNode(0, getObject().stamp())); NewInstanceNode newInstance = newGraph.add(new NewInstanceNode(type, true)); newGraph.addAfterFixed(newGraph.start(), newInstance); ReturnNode returnNode = newGraph.add(new ReturnNode(newInstance)); newGraph.addAfterFixed(newInstance, returnNode); for (ResolvedJavaField field : type.getInstanceFields(true)) { LoadFieldNode load = newGraph.add(new LoadFieldNode(param, field)); newGraph.addBeforeFixed(returnNode, load); newGraph.addBeforeFixed(returnNode, newGraph.add(new StoreFieldNode(newInstance, field, load))); } return lowerReplacement(newGraph, tool); } } } return null; } private static boolean isCloneableType(ResolvedJavaType type, MetaAccessProvider metaAccess) { return metaAccess.lookupJavaType(Cloneable.class).isAssignableFrom(type); } /* * Looks at the given stamp and determines if it is an exact type (or can be assumed to be an * exact type) and if it is a cloneable type. * * If yes, then the exact type is returned, otherwise it returns null. */ private static ResolvedJavaType getConcreteType(Stamp stamp, Assumptions assumptions, MetaAccessProvider metaAccess) { if (!(stamp instanceof ObjectStamp)) { return null; } ObjectStamp objectStamp = (ObjectStamp) stamp; if (objectStamp.type() == null) { return null; } else if (objectStamp.isExactType()) { return isCloneableType(objectStamp.type(), metaAccess) ? objectStamp.type() : null; } else { ResolvedJavaType type = objectStamp.type().findUniqueConcreteSubtype(); if (type != null && isCloneableType(type, metaAccess)) { assumptions.recordConcreteSubtype(objectStamp.type(), type); return type; } else { return null; } } } @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, Collections.<MonitorIdNode> emptyList()); tool.replaceWithVirtual(newVirtual); } } else { ValueNode obj; if (originalState != null) { obj = originalState.getMaterializedValue(); } else { obj = tool.getReplacedValue(getObject()); } ResolvedJavaType type = getConcreteType(obj.stamp(), tool.getAssumptions(), tool.getMetaAccessProvider()); if (type != null && !type.isArray()) { VirtualInstanceNode newVirtual = new VirtualInstanceNode(type, true); ResolvedJavaField[] fields = newVirtual.getFields(); 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] = new LoadFieldNode(obj, fields[i]); tool.addNode(loads[i]); } tool.createVirtualObject(newVirtual, state, Collections.<MonitorIdNode> emptyList()); tool.replaceWithVirtual(newVirtual); } } } @Override public ValueNode length() { if (getObject() instanceof ArrayLengthProvider) { return ((ArrayLengthProvider) getObject()).length(); } else { return null; } } }