Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/LoadFieldNode.java @ 7660:0b646334c5f7
keep track of leafGraphIds only at the StructuredGraph level (see GRAAL-60)
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 01 Feb 2013 17:32:59 +0100 |
parents | 5e3d1a68664e |
children | 432b8405e056 |
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/* * Copyright (c) 2009, 2011, 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.nodes.java; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.nodes.virtual.*; /** * The {@code LoadFieldNode} represents a read of a static or instance field. */ @NodeInfo(nameTemplate = "LoadField#{p#field/s}") public final class LoadFieldNode extends AccessFieldNode implements Canonicalizable, Node.IterableNodeType, Virtualizable { /** * Creates a new LoadFieldNode instance. * * @param object the receiver object * @param field the compiler interface field */ public LoadFieldNode(ValueNode object, ResolvedJavaField field) { super(createStamp(field), object, field); } private static Stamp createStamp(ResolvedJavaField field) { Kind kind = field.getKind(); if (kind == Kind.Object && field.getType() instanceof ResolvedJavaType) { return StampFactory.declared((ResolvedJavaType) field.getType()); } else { return StampFactory.forKind(kind); } } @Override public ValueNode canonical(CanonicalizerTool tool) { MetaAccessProvider runtime = tool.runtime(); if (runtime != null) { Constant constant = null; if (isStatic()) { constant = field().readConstantValue(null); } else if (object().isConstant() && !object().isNullConstant()) { constant = field().readConstantValue(object().asConstant()); } if (constant != null) { return ConstantNode.forConstant(constant, runtime, graph()); } } return this; } @Override public void virtualize(VirtualizerTool tool) { State state = tool.getObjectState(object()); if (state != null && state.getState() == EscapeState.Virtual) { int fieldIndex = ((VirtualInstanceNode) state.getVirtualObject()).fieldIndex(field()); if (fieldIndex != -1) { tool.replaceWith(state.getEntry(fieldIndex)); } } } }