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annotate graal/com.oracle.graal.phases/src/com/oracle/graal/phases/OptimisticOptimizations.java @ 9238:8f01fe16e473

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refactorings and cleanups for the removal of FixedNode.probability
author Christian Haeubl <haeubl@ssw.jku.at>
date Mon, 22 Apr 2013 17:49:13 +0200
parents b2f88686f68b
children ca34e36c53e8
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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;
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24
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25 import java.util.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.debug.*;
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30 public final class OptimisticOptimizations {
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31
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32 public static final OptimisticOptimizations ALL = new OptimisticOptimizations(EnumSet.allOf(Optimization.class));
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33 public static final OptimisticOptimizations NONE = new OptimisticOptimizations(EnumSet.noneOf(Optimization.class));
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34 private static final DebugMetric disabledOptimisticOptsMetric = Debug.metric("DisabledOptimisticOpts");
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35
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36 public static enum Optimization {
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37 RemoveNeverExecutedCode, UseTypeCheckedInlining, UseTypeCheckHints, UseExceptionProbabilityForOperations, UseExceptionProbability
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38 }
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39
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40 private final Set<Optimization> enabledOpts;
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41
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42 public OptimisticOptimizations(ResolvedJavaMethod method) {
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43 this.enabledOpts = EnumSet.noneOf(Optimization.class);
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44
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45 enabledOpts.add(Optimization.UseExceptionProbabilityForOperations);
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46 addOptimization(method, DeoptimizationReason.UnreachedCode, Optimization.RemoveNeverExecutedCode);
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47 addOptimization(method, DeoptimizationReason.TypeCheckedInliningViolated, Optimization.UseTypeCheckedInlining);
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48 addOptimization(method, DeoptimizationReason.OptimizedTypeCheckViolated, Optimization.UseTypeCheckHints);
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49 addOptimization(method, DeoptimizationReason.NotCompiledExceptionHandler, Optimization.UseExceptionProbability);
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50 }
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51
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52 private void addOptimization(ResolvedJavaMethod method, DeoptimizationReason deoptReason, Optimization optimization) {
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53 if (checkDeoptimizations(method.getProfilingInfo(), deoptReason)) {
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54 enabledOpts.add(optimization);
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55 } else {
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56 disabledOptimisticOptsMetric.increment();
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57 }
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58 }
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59
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60 public OptimisticOptimizations remove(Optimization... optimizations) {
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61 Set<Optimization> newOptimizations = EnumSet.copyOf(enabledOpts);
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62 for (Optimization o : optimizations) {
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63 newOptimizations.remove(o);
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64 }
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65 return new OptimisticOptimizations(newOptimizations);
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66 }
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67
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68 public OptimisticOptimizations add(Optimization... optimizations) {
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69 Set<Optimization> newOptimizations = EnumSet.copyOf(enabledOpts);
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70 for (Optimization o : optimizations) {
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71 newOptimizations.add(o);
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72 }
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73 return new OptimisticOptimizations(newOptimizations);
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74 }
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75
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76 private OptimisticOptimizations(Set<Optimization> enabledOpts) {
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77 this.enabledOpts = enabledOpts;
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78 }
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79
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80 public boolean removeNeverExecutedCode() {
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81 return GraalOptions.RemoveNeverExecutedCode && enabledOpts.contains(Optimization.RemoveNeverExecutedCode);
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82 }
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83
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84 public boolean useTypeCheckHints() {
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85 return GraalOptions.UseTypeCheckHints && enabledOpts.contains(Optimization.UseTypeCheckHints);
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86 }
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87
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88 public boolean inlineMonomorphicCalls() {
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89 return GraalOptions.InlineMonomorphicCalls && enabledOpts.contains(Optimization.UseTypeCheckedInlining);
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90 }
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91
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92 public boolean inlinePolymorphicCalls() {
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93 return GraalOptions.InlinePolymorphicCalls && enabledOpts.contains(Optimization.UseTypeCheckedInlining);
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94 }
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95
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96 public boolean inlineMegamorphicCalls() {
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97 return GraalOptions.InlineMegamorphicCalls && enabledOpts.contains(Optimization.UseTypeCheckedInlining);
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98 }
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99
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100 public boolean devirtualizeInvokes() {
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101 return GraalOptions.OptDevirtualizeInvokesOptimistically && enabledOpts.contains(Optimization.UseTypeCheckedInlining);
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102 }
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103
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104 public boolean useExceptionProbability() {
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105 return GraalOptions.UseExceptionProbability && enabledOpts.contains(Optimization.UseExceptionProbability);
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106 }
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107
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108 public boolean useExceptionProbabilityForOperations() {
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109 return GraalOptions.UseExceptionProbabilityForOperations && enabledOpts.contains(Optimization.UseExceptionProbabilityForOperations);
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110 }
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111
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112 public boolean lessOptimisticThan(OptimisticOptimizations other) {
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113 for (Optimization opt : Optimization.values()) {
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114 if (!enabledOpts.contains(opt) && other.enabledOpts.contains(opt)) {
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115 return true;
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116 }
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117 }
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118 return false;
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119 }
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120
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121 private static boolean checkDeoptimizations(ProfilingInfo profilingInfo, DeoptimizationReason reason) {
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122 return profilingInfo.getDeoptimizationCount(reason) < GraalOptions.DeoptsToDisableOptimisticOptimization;
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123 }
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124 }