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annotate graal/com.oracle.graal.virtual/src/com/oracle/graal/virtual/phases/ea/PartialEscapeAnalysisPhase.java @ 9876:975cc822632a

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PEA phase only needs PhaseContext
author Lukas Stadler <lukas.stadler@jku.at>
date Wed, 05 Jun 2013 11:46:19 +0200
parents 063a712fe8d8
children 97cabe2c4642
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 import java.util.concurrent.*;
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29
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30 import com.oracle.graal.debug.*;
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31 import com.oracle.graal.graph.*;
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32 import com.oracle.graal.nodes.*;
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33 import com.oracle.graal.nodes.java.*;
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34 import com.oracle.graal.nodes.spi.*;
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35 import com.oracle.graal.nodes.util.*;
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36 import com.oracle.graal.nodes.virtual.*;
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37 import com.oracle.graal.phases.*;
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38 import com.oracle.graal.phases.common.*;
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39 import com.oracle.graal.phases.common.CanonicalizerPhase.CustomCanonicalizer;
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40 import com.oracle.graal.phases.graph.*;
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41 import com.oracle.graal.phases.schedule.*;
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42 import com.oracle.graal.phases.tiers.*;
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43
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44 public class PartialEscapeAnalysisPhase extends BasePhase<PhaseContext> {
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45
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46 public abstract static class Closure<T> extends ReentrantBlockIterator.BlockIteratorClosure<T> {
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47
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48 public abstract boolean hasChanged();
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49
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50 public abstract void applyEffects();
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51 }
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52
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53 private final CustomCanonicalizer customCanonicalizer;
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54 private final boolean iterative;
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55 private final boolean readElimination;
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56
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57 public PartialEscapeAnalysisPhase(boolean iterative, boolean readElimination) {
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58 this(null, iterative, readElimination);
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59 }
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60
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61 public PartialEscapeAnalysisPhase(CustomCanonicalizer customCanonicalizer, boolean iterative, boolean readElimination) {
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62 this.customCanonicalizer = customCanonicalizer;
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63 this.iterative = iterative;
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64 this.readElimination = readElimination;
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65 }
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66
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67 @Override
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68 protected void run(StructuredGraph graph, PhaseContext context) {
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69 runAnalysis(graph, context);
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70 }
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71
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72 public boolean runAnalysis(final StructuredGraph graph, final PhaseContext context) {
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73 if (!VirtualUtil.matches(graph, EscapeAnalyzeOnly.getValue())) {
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74 return false;
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75 }
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76
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77 if (!readElimination) {
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78 boolean analyzableNodes = false;
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79 for (Node node : graph.getNodes()) {
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80 if (node instanceof VirtualizableAllocation) {
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81 analyzableNodes = true;
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82 break;
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83 }
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84 }
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85 if (!analyzableNodes) {
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86 return false;
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87 }
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88 }
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89
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90 boolean continueIteration = true;
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91 boolean changed = false;
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92 for (int iteration = 0; iteration < EscapeAnalysisIterations.getValue() && continueIteration; iteration++) {
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93 boolean currentChanged = Debug.scope("iteration " + iteration, new Callable<Boolean>() {
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94
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95 @Override
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96 public Boolean call() {
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97
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98 SchedulePhase schedule = new SchedulePhase();
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99 schedule.apply(graph, false);
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100 Closure<?> closure = createAnalysisClosure(context, schedule);
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101 ReentrantBlockIterator.apply(closure, schedule.getCFG().getStartBlock());
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102
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103 if (!closure.hasChanged()) {
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104 return false;
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105 }
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106
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107 // apply the effects collected during the escape analysis iteration
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108 closure.applyEffects();
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109
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110 Debug.dump(graph, "after PartialEscapeAnalysis iteration");
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111
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112 new DeadCodeEliminationPhase().apply(graph);
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113
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114 if (OptCanonicalizer.getValue()) {
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115 new CanonicalizerPhase.Instance(context.getRuntime(), context.getAssumptions(), null, customCanonicalizer).apply(graph);
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116 }
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117
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118 return true;
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119 }
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120 });
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121 continueIteration = currentChanged && iterative;
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122 changed |= currentChanged;
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123 }
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124
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125 return changed;
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126 }
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127
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128 protected Closure<?> createAnalysisClosure(PhaseContext context, SchedulePhase schedule) {
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129 return new PartialEscapeClosure<>(schedule, context.getRuntime(), context.getAssumptions());
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130 }
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131
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132 public static Map<Invoke, Double> getHints(StructuredGraph graph) {
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133 NodesToDoubles probabilities = new ComputeProbabilityClosure(graph).apply();
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134 Map<Invoke, Double> hints = null;
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135 for (CommitAllocationNode commit : graph.getNodes(CommitAllocationNode.class)) {
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136 double sum = 0;
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137 double invokeSum = 0;
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138 for (Node commitUsage : commit.usages()) {
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139 for (Node usage : commitUsage.usages()) {
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140 if (usage instanceof FixedNode) {
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141 sum += probabilities.get((FixedNode) usage);
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142 } else {
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143 if (usage instanceof MethodCallTargetNode) {
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144 invokeSum += probabilities.get(((MethodCallTargetNode) usage).invoke().asNode());
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145 }
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146 for (Node secondLevelUage : usage.usages()) {
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147 if (secondLevelUage instanceof FixedNode) {
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148 sum += probabilities.get(((FixedNode) secondLevelUage));
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149 }
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150 }
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151 }
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152 }
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153 }
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154 // TODO(lstadler) get rid of this magic number
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155 if (sum > 100 && invokeSum > 0) {
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156 for (Node commitUsage : commit.usages()) {
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157 for (Node usage : commitUsage.usages()) {
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158 if (usage instanceof MethodCallTargetNode) {
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159 if (hints == null) {
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160 hints = new HashMap<>();
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161 }
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162 Invoke invoke = ((MethodCallTargetNode) usage).invoke();
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163 hints.put(invoke, sum / invokeSum);
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164 }
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165 }
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166 }
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167 }
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168 }
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169 return hints;
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170 }
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Lukas Stadler <lukas.stadler@jku.at>
parents:
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171 }