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annotate graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/ConvertUnreachedToGuardPhase.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents b1ebd583be14
children 0b646334c5f7
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.phases.common;
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24
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25 import com.oracle.graal.api.code.*;
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26 import com.oracle.graal.api.meta.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.nodes.*;
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29 import com.oracle.graal.nodes.extended.*;
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30 import com.oracle.graal.nodes.util.*;
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31 import com.oracle.graal.phases.*;
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32
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33 public class ConvertUnreachedToGuardPhase extends Phase {
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34
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35 private OptimisticOptimizations opt;
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36
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37 public ConvertUnreachedToGuardPhase(OptimisticOptimizations opt) {
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38 this.opt = opt;
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39 }
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40
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41 @Override
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42 protected void run(StructuredGraph graph) {
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43 if (!opt.removeNeverExecutedCode()) {
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44 return;
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45 }
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46 for (Node node : graph.getNodes()) {
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47 if (node instanceof IfNode) {
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48 IfNode ifNode = (IfNode) node;
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49 BeginNode insertGuard = null;
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50 BeginNode delete = null;
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51 boolean inverted = false;
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52 if (ifNode.probability(ifNode.trueSuccessor()) == 0) {
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53 insertGuard = ifNode.falseSuccessor();
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54 delete = ifNode.trueSuccessor();
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55 inverted = true;
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56 } else if (ifNode.probability(ifNode.falseSuccessor()) == 0) {
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57 insertGuard = ifNode.trueSuccessor();
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58 delete = ifNode.falseSuccessor();
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59 }
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60 if (insertGuard != null) {
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61 GuardNode guard = graph.unique(new GuardNode(ifNode.condition(), BeginNode.prevBegin(ifNode), DeoptimizationReason.UnreachedCode, DeoptimizationAction.InvalidateReprofile,
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62 inverted, ifNode.leafGraphId()));
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63 graph.addBeforeFixed(ifNode, graph.add(new ValueAnchorNode(guard)));
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64 GraphUtil.killCFG(delete);
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65 graph.removeSplit(ifNode, inverted ? ifNode.falseSuccessor() : ifNode.trueSuccessor());
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66 }
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67 }
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68 }
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69
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70 }
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71
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72 }