Mercurial > hg > graal-compiler
view graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/ConvertUnreachedToGuardPhase.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 |
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/* * Copyright (c) 2012, 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.phases.common; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.util.*; import com.oracle.graal.phases.*; public class ConvertUnreachedToGuardPhase extends Phase { private OptimisticOptimizations opt; public ConvertUnreachedToGuardPhase(OptimisticOptimizations opt) { this.opt = opt; } @Override protected void run(StructuredGraph graph) { if (!opt.removeNeverExecutedCode()) { return; } for (Node node : graph.getNodes()) { if (node instanceof IfNode) { IfNode ifNode = (IfNode) node; BeginNode insertGuard = null; BeginNode delete = null; boolean inverted = false; if (ifNode.probability(ifNode.trueSuccessor()) == 0) { insertGuard = ifNode.falseSuccessor(); delete = ifNode.trueSuccessor(); inverted = true; } else if (ifNode.probability(ifNode.falseSuccessor()) == 0) { insertGuard = ifNode.trueSuccessor(); delete = ifNode.falseSuccessor(); } if (insertGuard != null) { GuardNode guard = graph.unique(new GuardNode(ifNode.condition(), BeginNode.prevBegin(ifNode), DeoptimizationReason.UnreachedCode, DeoptimizationAction.InvalidateReprofile, inverted)); graph.addBeforeFixed(ifNode, graph.add(new ValueAnchorNode(guard))); GraphUtil.killCFG(delete); graph.removeSplit(ifNode, inverted ? ifNode.falseSuccessor() : ifNode.trueSuccessor()); } } } } }