Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/ObjectGetClassNode.java @ 17450:45b45f902bed
removed Node generation (GRAAL-857)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 15 Oct 2014 15:35:33 +0200 |
parents | 0fe4732e5181 |
children | 9619ba4daf4c |
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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.replacements; import static com.oracle.graal.compiler.common.GraalOptions.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.api.meta.ResolvedJavaType.Representation; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.replacements.nodes.*; /** * This macro node will replace itself with the correct Java {@link Class} as soon as the object's * type is known (exact). */ @NodeInfo public class ObjectGetClassNode extends MacroNode implements Virtualizable, Canonicalizable { public static ObjectGetClassNode create(Invoke invoke) { return new ObjectGetClassNode(invoke); } protected ObjectGetClassNode(Invoke invoke) { super(invoke); } private ValueNode getObject() { return arguments.get(0); } @Override public void virtualize(VirtualizerTool tool) { if (ImmutableCode.getValue()) { return; } State state = tool.getObjectState(getObject()); if (state != null) { Constant clazz = state.getVirtualObject().type().getEncoding(Representation.JavaClass); tool.replaceWithValue(ConstantNode.forConstant(clazz, tool.getMetaAccessProvider(), graph())); } } @Override public Node canonical(CanonicalizerTool tool) { if (ImmutableCode.getValue()) { return this; } if (usages().isEmpty()) { return null; } else { ResolvedJavaType type = StampTool.typeOrNull(getObject()); if (StampTool.isExactType(getObject())) { Constant clazz = type.getEncoding(Representation.JavaClass); return ConstantNode.forConstant(clazz, tool.getMetaAccess()); } if (type != null && tool.assumptions().useOptimisticAssumptions()) { ResolvedJavaType exactType = type.findUniqueConcreteSubtype(); if (exactType != null) { tool.assumptions().recordConcreteSubtype(type, exactType); Constant clazz = exactType.getEncoding(Representation.JavaClass); return ConstantNode.forConstant(clazz, tool.getMetaAccess()); } } return this; } } }