Mercurial > hg > graal-compiler
view graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/LoadIndexedFinalNode.java @ 12052:0afe7370260c
refactored constantEquals(), lookupArrayLength() and readUnsafeConstant() out of MetaAccessProvider into ConstantReflectionProvider (GRAAL-511)
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 11 Oct 2013 12:19:09 +0200 |
parents | 3cd7b1a27645 |
children | db4254246f9a |
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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.truffle.nodes; import java.lang.reflect.*; import sun.misc.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * @see LoadIndexedNode */ public final class LoadIndexedFinalNode extends AccessIndexedNode implements Canonicalizable { /** * Creates a new {@link LoadIndexedFinalNode}. * * @param array the instruction producing the array * @param index the instruction producing the index * @param elementKind the element type */ public LoadIndexedFinalNode(ValueNode array, ValueNode index, Kind elementKind) { super(createStamp(array, elementKind), array, index, elementKind); } @Override public Node canonical(CanonicalizerTool tool) { if (array().isConstant() && !array().isNullConstant() && index().isConstant()) { Object array = array().asConstant().asObject(); long index = index().asConstant().asLong(); if (index >= 0 && index < Array.getLength(array)) { int arrayBaseOffset = Unsafe.getUnsafe().arrayBaseOffset(array.getClass()); int arrayIndexScale = Unsafe.getUnsafe().arrayIndexScale(array.getClass()); Constant constant = tool.getConstantReflection().readUnsafeConstant(elementKind(), array().asConstant(), arrayBaseOffset + index * arrayIndexScale, elementKind() == Kind.Object); return ConstantNode.forConstant(constant, tool.getMetaAccess(), graph()); } } return this; } private static Stamp createStamp(ValueNode array, Kind kind) { ResolvedJavaType type = ObjectStamp.typeOrNull(array); if (kind == Kind.Object && type != null) { return StampFactory.declared(type.getComponentType()); } else { return StampFactory.forKind(kind); } } @Override public boolean inferStamp() { return updateStamp(createStamp(array(), elementKind())); } @Override public void lower(LoweringTool tool) { LoadIndexedNode loadIndexedNode = graph().add(new LoadIndexedNode(array(), index(), elementKind())); graph().replaceFixedWithFixed(this, loadIndexedNode); loadIndexedNode.lower(tool); } }