Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/LoadIndexedNode.java @ 19526:8fc336a04d77
Create TYPE fields for LIRInstruction and CompositeValue. Renaming NodeClass#get to NodeClass#create.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 20 Feb 2015 22:22:55 +0100 |
parents | 880717e44675 |
children | 48c1ebd24120 |
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/* * Copyright (c) 2009, 2015, 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.compiler.common.type.*; 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.*; /** * The {@code LoadIndexedNode} represents a read from an element of an array. */ @NodeInfo public class LoadIndexedNode extends AccessIndexedNode implements Virtualizable, Canonicalizable { public static final NodeClass<LoadIndexedNode> TYPE = NodeClass.create(LoadIndexedNode.class); /** * Creates a new LoadIndexedNode. * * @param array the instruction producing the array * @param index the instruction producing the index * @param elementKind the element type */ public LoadIndexedNode(ValueNode array, ValueNode index, Kind elementKind) { this(TYPE, createStamp(array, elementKind), array, index, elementKind); } public static ValueNode create(ValueNode array, ValueNode index, Kind elementKind, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) { ValueNode constant = tryConstantFold(array, index, metaAccess, constantReflection); if (constant != null) { return constant; } return new LoadIndexedNode(array, index, elementKind); } protected LoadIndexedNode(NodeClass<? extends LoadIndexedNode> c, Stamp stamp, ValueNode array, ValueNode index, Kind elementKind) { super(c, stamp, array, index, elementKind); } private static Stamp createStamp(ValueNode array, Kind kind) { ResolvedJavaType type = StampTool.typeOrNull(array); if (kind == Kind.Object && type != null) { return StampFactory.declaredTrusted(type.getComponentType()); } else { return StampFactory.forKind(kind); } } @Override public boolean inferStamp() { return updateStamp(createStamp(array(), elementKind())); } @Override public void virtualize(VirtualizerTool tool) { State arrayState = tool.getObjectState(array()); if (arrayState != null && arrayState.getState() == EscapeState.Virtual) { ValueNode indexValue = tool.getReplacedValue(index()); int idx = indexValue.isConstant() ? indexValue.asJavaConstant().asInt() : -1; if (idx >= 0 && idx < arrayState.getVirtualObject().entryCount()) { tool.replaceWith(arrayState.getEntry(idx)); } } } public Node canonical(CanonicalizerTool tool) { ValueNode constant = tryConstantFold(array(), index(), tool.getMetaAccess(), tool.getConstantReflection()); if (constant != null) { return constant; } return this; } private static ValueNode tryConstantFold(ValueNode array, ValueNode index, MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) { if (array.isConstant() && !array.isNullConstant() && index.isConstant()) { JavaConstant arrayConstant = array.asJavaConstant(); if (arrayConstant != null) { JavaConstant constant = constantReflection.readConstantArrayElement(arrayConstant, index.asJavaConstant().asInt()); if (constant != null) { return ConstantNode.forConstant(constant, metaAccess); } } } return null; } }