Mercurial > hg > graal-compiler
annotate graal/com.oracle.graal.phases.common/src/com/oracle/graal/phases/common/ConvertUnreachedToGuardPhase.java @ 7932:d4e6c82cd6a1
Remove deferred write logic.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Tue, 05 Mar 2013 17:16:41 +0100 |
parents | 0b646334c5f7 |
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rev | line source |
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Add leadGraphID to IfNOde so that we can convert them to deopts
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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)); |
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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 } |