Mercurial > hg > graal-compiler
view graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/typesystem/CustomizedUnsafeLoadFinalNode.java @ 16919:0fe4732e5181
made use of generated Node classes predicated on value of graal.useGeneratedNodes system property (default is false)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 25 Aug 2014 13:45:12 +0200 |
parents | f90dcdbbb75e |
children | 77981382473e |
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/* * Copyright (c) 2014, 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.typesystem; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.calc.*; 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.calc.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.truffle.nodes.*; import com.oracle.truffle.api.*; /** * Load of a final value from a location specified as an offset relative to an object. * * Substitution for method {@link CompilerDirectives#unsafeGetFinalObject} and friends. */ @NodeInfo public class CustomizedUnsafeLoadFinalNode extends FixedWithNextNode implements Canonicalizable, Virtualizable, Lowerable { @Input ValueNode object; @Input ValueNode offset; @Input ValueNode condition; @Input ValueNode location; private final Kind accessKind; public static CustomizedUnsafeLoadFinalNode create(ValueNode object, ValueNode offset, ValueNode condition, ValueNode location, Kind accessKind) { return USE_GENERATED_NODES ? new CustomizedUnsafeLoadFinalNodeGen(object, offset, condition, location, accessKind) : new CustomizedUnsafeLoadFinalNode(object, offset, condition, location, accessKind); } protected CustomizedUnsafeLoadFinalNode(ValueNode object, ValueNode offset, ValueNode condition, ValueNode location, Kind accessKind) { super(StampFactory.forKind(accessKind.getStackKind())); this.object = object; this.offset = offset; this.condition = condition; this.location = location; this.accessKind = accessKind; } @Override public Node canonical(CanonicalizerTool tool) { if (object.isConstant() && !object.isNullConstant() && offset.isConstant() && condition.isConstant() && condition.asConstant().asInt() == 1) { Constant constant = tool.getConstantReflection().readUnsafeConstant(accessKind, object.asConstant(), offset.asConstant().asLong()); return ConstantNode.forConstant(constant, tool.getMetaAccess()); } return this; } /** * @see UnsafeLoadNode#virtualize(VirtualizerTool) */ @Override public void virtualize(VirtualizerTool tool) { State state = tool.getObjectState(object); if (state != null && state.getState() == EscapeState.Virtual) { ValueNode offsetValue = tool.getReplacedValue(offset); if (offsetValue.isConstant()) { long constantOffset = offsetValue.asConstant().asLong(); int entryIndex = state.getVirtualObject().entryIndexForOffset(constantOffset); if (entryIndex != -1) { ValueNode entry = state.getEntry(entryIndex); if (entry.getKind() == getKind() || state.getVirtualObject().entryKind(entryIndex) == accessKind) { tool.replaceWith(entry); } } } } } @Override public void lower(LoweringTool tool) { CompareNode compare = CompareNode.createCompareNode(graph(), Condition.EQ, condition, ConstantNode.forBoolean(true, graph())); LocationIdentity locationIdentity; if (!location.isConstant() || location.asConstant().isNull()) { locationIdentity = LocationIdentity.ANY_LOCATION; } else { locationIdentity = ObjectLocationIdentity.create(location.asConstant()); } UnsafeLoadNode result = graph().add(UnsafeLoadNode.create(object, offset, accessKind, locationIdentity, compare)); graph().replaceFixedWithFixed(this, result); result.lower(tool); } @SuppressWarnings("unused") @NodeIntrinsic public static <T> T load(Object object, long offset, boolean condition, Object locationIdentity, @ConstantNodeParameter Kind kind) { return UnsafeLoadNode.load(object, offset, kind, null); } }