Mercurial > hg > truffle
view graal/com.oracle.graal.replacements/src/com/oracle/graal/replacements/nodes/BasicObjectCloneNode.java @ 20879:550e422e5483
fixed npe in BasicObjectCloneNode
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Thu, 09 Apr 2015 22:03:39 +0200 |
parents | 8470e81631f8 |
children | 93c50cefb9e8 |
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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.replacements.nodes; import java.util.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.api.meta.Assumptions.AssumptionResult; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.CallTargetNode.InvokeKind; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.util.*; import com.oracle.graal.nodes.virtual.*; @NodeInfo public abstract class BasicObjectCloneNode extends MacroStateSplitNode implements VirtualizableAllocation, ArrayLengthProvider { public static final NodeClass<BasicObjectCloneNode> TYPE = NodeClass.create(BasicObjectCloneNode.class); public BasicObjectCloneNode(NodeClass<? extends MacroNode> c, InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, JavaType returnType, ValueNode... arguments) { super(c, invokeKind, targetMethod, bci, returnType, arguments); } @Override public boolean inferStamp() { Stamp objectStamp = getObject().stamp(); if (objectStamp instanceof ObjectStamp) { objectStamp = objectStamp.join(StampFactory.objectNonNull()); } return updateStamp(objectStamp); } public ValueNode getObject() { return arguments.get(0); } protected 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. */ protected 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 if (assumptions != null) { AssumptionResult<ResolvedJavaType> leafConcreteSubtype = objectStamp.type().findLeafConcreteSubtype(); if (leafConcreteSubtype != null && isCloneableType(leafConcreteSubtype.getResult(), metaAccess)) { assumptions.record(leafConcreteSubtype); return leafConcreteSubtype.getResult(); } } 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(), graph().getAssumptions(), tool.getMetaAccessProvider()); if (type != null && !type.isArray()) { VirtualInstanceNode newVirtual = createVirtualInstanceNode(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); } } } protected VirtualInstanceNode createVirtualInstanceNode(ResolvedJavaType type, boolean hasIdentity) { return new VirtualInstanceNode(type, hasIdentity); } @Override public ValueNode length() { return GraphUtil.arrayLength(getObject()); } }