Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/GuardNode.java @ 5082:f29e75070bb6
experimental type storage/query infrastructure, part 2: type feedback
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 14 Mar 2012 17:46:39 +0100 |
parents | e808627bd16f |
children | e5427faad192 51111665eda6 |
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/* * Copyright (c) 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; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.spi.types.*; import com.oracle.graal.nodes.type.*; public final class GuardNode extends FloatingNode implements Canonicalizable, LIRLowerable, TypeFeedbackProvider, Node.IterableNodeType { @Input private BooleanNode condition; @Input(notDataflow = true) private FixedNode anchor; public FixedNode anchor() { return anchor; } public void setAnchor(FixedNode x) { updateUsages(anchor, x); anchor = x; } /** * The instruction that produces the tested boolean value. */ public BooleanNode condition() { return condition; } public void setCondition(BooleanNode x) { updateUsages(condition, x); condition = x; } public GuardNode(BooleanNode condition, FixedNode anchor) { super(StampFactory.illegal()); this.condition = condition; this.anchor = anchor; } @Override public void generate(LIRGeneratorTool gen) { gen.emitGuardCheck(condition()); } @Override public ValueNode canonical(CanonicalizerTool tool) { if (condition() instanceof ConstantNode) { ConstantNode c = (ConstantNode) condition(); if (c.asConstant().asBoolean()) { if (!dependencies().isEmpty()) { for (Node usage : usages()) { if (usage instanceof ValueNode) { ((ValueNode) usage).dependencies().addAll(dependencies()); } } } this.replaceAtUsages(null); return null; } } return this; } @Override public void typeFeedback(TypeFeedbackTool tool) { if (condition instanceof ConditionalTypeFeedbackProvider) { ((ConditionalTypeFeedbackProvider) condition).typeFeedback(tool); } } }