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annotate graal/com.oracle.graal.virtual/src/com/oracle/graal/virtual/phases/ea/PartialEscapePhase.java @ 11437:58b72cc17109

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incremental canonicalization for PartialEscapePhase / EffectsPhase
author Lukas Stadler <lukas.stadler@jku.at>
date Tue, 27 Aug 2013 10:14:06 +0200
parents 8a46f9081ea3
children 5bbc028f4507
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1 /*
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2 * Copyright (c) 2011, 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.virtual.phases.ea;
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24
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25 import static com.oracle.graal.phases.GraalOptions.*;
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26
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27 import java.util.*;
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28
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29 import com.oracle.graal.graph.*;
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30 import com.oracle.graal.nodes.*;
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31 import com.oracle.graal.nodes.java.*;
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32 import com.oracle.graal.nodes.spi.*;
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33 import com.oracle.graal.nodes.util.*;
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34 import com.oracle.graal.nodes.virtual.*;
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35 import com.oracle.graal.options.*;
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36 import com.oracle.graal.phases.graph.*;
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37 import com.oracle.graal.phases.schedule.*;
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38 import com.oracle.graal.phases.tiers.*;
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39
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40 public class PartialEscapePhase extends EffectsPhase<PhaseContext> {
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41
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42 //@formatter:off
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43 @Option(help = "")
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44 public static final OptionValue<Boolean> OptEarlyReadElimination = new OptionValue<>(true);
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45 //@formatter:on
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46
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47 private final boolean readElimination;
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48
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49 public PartialEscapePhase(boolean iterative) {
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50 this(iterative, OptEarlyReadElimination.getValue());
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51 }
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52
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53 public PartialEscapePhase(boolean iterative, boolean readElimination) {
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54 super(iterative ? EscapeAnalysisIterations.getValue() : 1);
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55 this.readElimination = readElimination;
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56 }
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57
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58 @Override
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59 protected void run(StructuredGraph graph, PhaseContext context) {
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60 if (VirtualUtil.matches(graph, EscapeAnalyzeOnly.getValue())) {
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61 if (readElimination || graph.getNodes().filterInterface(VirtualizableAllocation.class).isNotEmpty()) {
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62 runAnalysis(graph, context);
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63 }
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64 }
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65 }
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66
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67 @Override
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68 protected Closure<?> createEffectsClosure(PhaseContext context, SchedulePhase schedule) {
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69 if (readElimination) {
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70 return new PEReadEliminationClosure(schedule, context.getRuntime(), context.getAssumptions());
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71 } else {
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72 return new PartialEscapeClosure.Final(schedule, context.getRuntime(), context.getAssumptions());
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73 }
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74 }
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75
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76 public static Map<Invoke, Double> getHints(StructuredGraph graph) {
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77 NodesToDoubles probabilities = new ComputeProbabilityClosure(graph).apply();
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78 Map<Invoke, Double> hints = null;
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79 for (CommitAllocationNode commit : graph.getNodes(CommitAllocationNode.class)) {
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80 double sum = 0;
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81 double invokeSum = 0;
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82 for (Node commitUsage : commit.usages()) {
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83 for (Node usage : commitUsage.usages()) {
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84 if (usage instanceof FixedNode) {
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85 sum += probabilities.get((FixedNode) usage);
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86 } else {
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87 if (usage instanceof MethodCallTargetNode) {
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88 invokeSum += probabilities.get(((MethodCallTargetNode) usage).invoke().asNode());
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89 }
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90 for (Node secondLevelUage : usage.usages()) {
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91 if (secondLevelUage instanceof FixedNode) {
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92 sum += probabilities.get(((FixedNode) secondLevelUage));
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93 }
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94 }
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95 }
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96 }
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97 }
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98 // TODO(lstadler) get rid of this magic number
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99 if (sum > 100 && invokeSum > 0) {
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100 for (Node commitUsage : commit.usages()) {
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101 for (Node usage : commitUsage.usages()) {
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102 if (usage instanceof MethodCallTargetNode) {
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103 if (hints == null) {
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104 hints = new HashMap<>();
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105 }
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106 Invoke invoke = ((MethodCallTargetNode) usage).invoke();
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107 hints.put(invoke, sum / invokeSum);
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108 }
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109 }
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110 }
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111 }
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112 }
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113 return hints;
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114 }
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115 }