Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/Assumptions.java @ 24155:88bd5f7522a1 jvmci-0.30

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update hgignore and undo change to hotspot/.project
author Doug Simon <doug.simon@oracle.com>
date Fri, 07 Jul 2017 15:08:58 +0200
parents bd8c5c264c42
children
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1 /*
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2 * Copyright (c) 2011, 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 jdk.vm.ci.meta;
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24
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25 import java.lang.invoke.CallSite;
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26 import java.lang.invoke.MethodHandle;
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27 import java.util.Arrays;
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28 import java.util.HashSet;
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29 import java.util.Iterator;
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30 import java.util.Set;
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31
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32 /**
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33 * Class for recording assumptions made during compilation.
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34 */
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35 public final class Assumptions implements Iterable<Assumptions.Assumption> {
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36
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37 /**
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38 * Abstract base class for assumptions. An assumption assumes a property of the runtime that may
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39 * be invalidated by subsequent execution (e.g., that a class has no subclasses implementing
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40 * {@link NoFinalizableSubclass Object.finalize()}).
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41 */
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42 public abstract static class Assumption {
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43 }
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44
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45 /**
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46 * A class for providing information that is only valid in association with a set of
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47 * {@link Assumption}s. It is permissible for AssumptionResults to have no assumptions at all.
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48 * For instance, if {@link ResolvedJavaType#isLeaf()} returns true for a type
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49 * {@link ResolvedJavaType#findLeafConcreteSubtype()} can return an AssumptionResult with no
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50 * assumptions since the leaf information is statically true.
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51 *
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52 * @param <T>
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53 */
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54 public static class AssumptionResult<T> {
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55 Assumption[] assumptions;
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56 final T result;
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57
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58 private static final Assumption[] EMPTY = new Assumption[0];
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59
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60 public AssumptionResult(T result, Assumption... assumptions) {
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61 this.result = result;
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62 this.assumptions = assumptions;
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63 }
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64
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65 public AssumptionResult(T result) {
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66 this(result, EMPTY);
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67 }
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68
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69 public T getResult() {
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70 return result;
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71 }
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72
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73 public boolean isAssumptionFree() {
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74 return assumptions.length == 0;
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75 }
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76
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77 public void add(AssumptionResult<T> other) {
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78 Assumption[] newAssumptions = Arrays.copyOf(this.assumptions, this.assumptions.length + other.assumptions.length);
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79 System.arraycopy(other.assumptions, 0, newAssumptions, this.assumptions.length, other.assumptions.length);
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80 this.assumptions = newAssumptions;
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81 }
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82
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83 public boolean canRecordTo(Assumptions target) {
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84 /*
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85 * We can use the result if it is either assumption free, or if we have a valid
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86 * Assumptions object where we can record assumptions.
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87 */
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88 return assumptions.length == 0 || target != null;
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89 }
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90
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91 public void recordTo(Assumptions target) {
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92 assert canRecordTo(target);
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93
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94 if (assumptions.length > 0) {
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95 for (Assumption assumption : assumptions) {
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96 target.record(assumption);
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97 }
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98 }
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99 }
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100 }
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101
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102 /**
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103 * An assumption that a given class has no subclasses implementing {@link Object#finalize()}).
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104 */
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105 public static final class NoFinalizableSubclass extends Assumption {
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106
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107 private ResolvedJavaType receiverType;
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108
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109 public NoFinalizableSubclass(ResolvedJavaType receiverType) {
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110 this.receiverType = receiverType;
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111 }
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112
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113 @Override
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114 public int hashCode() {
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115 return 31 + receiverType.hashCode();
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116 }
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117
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118 @Override
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119 public boolean equals(Object obj) {
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120 if (obj instanceof NoFinalizableSubclass) {
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121 NoFinalizableSubclass other = (NoFinalizableSubclass) obj;
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122 return other.receiverType.equals(receiverType);
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123 }
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124 return false;
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125 }
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126
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127 @Override
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128 public String toString() {
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129 return "NoFinalizableSubclass[receiverType=" + receiverType.toJavaName() + "]";
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130 }
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Bernhard Urban <bernhard.urban@jku.at>
parents: 8947
diff changeset
131
2979aaac95af assumptions: enable NoFinalizableSubclass assumption
Bernhard Urban <bernhard.urban@jku.at>
parents: 8947
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132 }
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133
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134 /**
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135 * An assumption that a given abstract or interface type has one direct concrete subtype. There
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136 * is no requirement that the subtype is a leaf type.
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137 */
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138 public static final class ConcreteSubtype extends Assumption {
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41034914e2ee add MethodContents assumption to fix debbugging issue
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139
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140 /**
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141 * Type the assumption is made about.
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142 */
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143 public final ResolvedJavaType context;
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144
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145 /**
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146 * Assumed concrete sub-type of the context type.
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147 */
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148 public final ResolvedJavaType subtype;
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149
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150 public ConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) {
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151 this.context = context;
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152 this.subtype = subtype;
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153 assert context.isAbstract();
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154 assert subtype.isConcrete() || context.isInterface() : subtype.toString() + " : " + context.toString();
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155 assert !subtype.isArray() || subtype.getElementalType().isFinalFlagSet() : subtype.toString() + " : " + context.toString();
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156 }
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157
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158 @Override
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159 public int hashCode() {
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160 final int prime = 31;
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161 int result = 1;
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162 result = prime * result + context.hashCode();
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163 result = prime * result + subtype.hashCode();
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164 return result;
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165 }
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166
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167 @Override
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168 public boolean equals(Object obj) {
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169 if (obj instanceof ConcreteSubtype) {
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170 ConcreteSubtype other = (ConcreteSubtype) obj;
14158
fd7fcd2d2072 replaced == with .equals() for comparisons between JavaMethod/JavaField/JavaType values
Doug Simon <doug.simon@oracle.com>
parents: 14157
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171 return other.context.equals(context) && other.subtype.equals(subtype);
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172 }
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173 return false;
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174 }
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175
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176 @Override
902f60aa20cc added toString() implementation to Assumption classes
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diff changeset
177 public String toString() {
16479
558cf39c646b moved toJavaName(JavaType type) from MetaUtil to be a default method in JavaType
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parents: 16476
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178 return "ConcreteSubtype[context=" + context.toJavaName() + ", subtype=" + subtype.toJavaName() + "]";
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179 }
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180 }
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181
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182 /**
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183 * An assumption that a given type has no subtypes.
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184 */
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185 public static final class LeafType extends Assumption {
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186
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187 /**
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188 * Type the assumption is made about.
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189 */
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190 public final ResolvedJavaType context;
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191
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192 public LeafType(ResolvedJavaType context) {
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22c3bdf28fff Don't generate LeafType assumptions for isLeaf == true types
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193 assert !context.isLeaf() : "assumption isn't required for leaf types";
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194 this.context = context;
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195 }
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196
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197 @Override
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198 public int hashCode() {
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199 final int prime = 31;
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200 int result = 1;
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201 result = prime * result + context.hashCode();
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202 return result;
deab43a789ad Split LeafType off from ConcreteSubtype
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parents: 19800
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203 }
deab43a789ad Split LeafType off from ConcreteSubtype
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204
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205 @Override
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206 public boolean equals(Object obj) {
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diff changeset
207 if (obj instanceof LeafType) {
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208 LeafType other = (LeafType) obj;
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209 return other.context.equals(context);
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210 }
deab43a789ad Split LeafType off from ConcreteSubtype
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211 return false;
deab43a789ad Split LeafType off from ConcreteSubtype
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parents: 19800
diff changeset
212 }
deab43a789ad Split LeafType off from ConcreteSubtype
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diff changeset
213
deab43a789ad Split LeafType off from ConcreteSubtype
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214 @Override
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diff changeset
215 public String toString() {
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216 return "LeafSubtype[context=" + context.toJavaName() + "]";
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diff changeset
217 }
deab43a789ad Split LeafType off from ConcreteSubtype
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parents: 19800
diff changeset
218 }
deab43a789ad Split LeafType off from ConcreteSubtype
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219
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diff changeset
220 /**
19306
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diff changeset
221 * An assumption that a given virtual method has a given unique implementation.
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diff changeset
222 */
19306
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diff changeset
223 public static final class ConcreteMethod extends Assumption {
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224
4142
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diff changeset
225 /**
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 7223
diff changeset
226 * A virtual (or interface) method whose unique implementation for the receiver type in
5e3d1a68664e applied mx eclipseformat to all Java files
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parents: 7223
diff changeset
227 * {@link #context} is {@link #impl}.
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228 */
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b4c406861c33 More renamings to drop Ri* prefix completely. Deleted graph.BitMap class and replaced with java.util.BitSet.
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diff changeset
229 public final ResolvedJavaMethod method;
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230
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231 /**
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232 * A receiver type.
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233 */
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diff changeset
234 public final ResolvedJavaType context;
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235
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236 /**
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237 * The unique implementation of {@link #method} for {@link #context}.
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238 */
5541
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diff changeset
239 public final ResolvedJavaMethod impl;
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diff changeset
240
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diff changeset
241 public ConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) {
3733
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242 this.method = method;
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243 this.context = context;
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diff changeset
244 this.impl = impl;
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245 }
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246
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247 @Override
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248 public int hashCode() {
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249 final int prime = 31;
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250 int result = 1;
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251 result = prime * result + method.hashCode();
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252 result = prime * result + context.hashCode();
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diff changeset
253 result = prime * result + impl.hashCode();
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254 return result;
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255 }
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256
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diff changeset
257 @Override
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258 public boolean equals(Object obj) {
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diff changeset
259 if (obj instanceof ConcreteMethod) {
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260 ConcreteMethod other = (ConcreteMethod) obj;
14158
fd7fcd2d2072 replaced == with .equals() for comparisons between JavaMethod/JavaField/JavaType values
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parents: 14157
diff changeset
261 return other.method.equals(method) && other.context.equals(context) && other.impl.equals(impl);
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diff changeset
262 }
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diff changeset
263 return false;
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parents:
diff changeset
264 }
7086
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diff changeset
265
902f60aa20cc added toString() implementation to Assumption classes
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parents: 7064
diff changeset
266 @Override
902f60aa20cc added toString() implementation to Assumption classes
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parents: 7064
diff changeset
267 public String toString() {
19250
8ab925a6f724 made Assumptions be part of a StructuredGraph
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parents: 19249
diff changeset
268 return "ConcreteMethod[method=" + method.format("%H.%n(%p)%r") + ", context=" + context.toJavaName() + ", impl=" + impl.format("%H.%n(%p)%r") + "]";
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diff changeset
269 }
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diff changeset
270 }
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271
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272 /**
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273 * An assumption that a given call site's method handle did not change.
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41034914e2ee add MethodContents assumption to fix debbugging issue
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274 */
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275 public static final class CallSiteTargetValue extends Assumption {
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276
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277 public final CallSite callSite;
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278 public final MethodHandle methodHandle;
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279
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280 public CallSiteTargetValue(CallSite callSite, MethodHandle methodHandle) {
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281 this.callSite = callSite;
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282 this.methodHandle = methodHandle;
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283 }
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284
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285 @Override
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286 public int hashCode() {
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287 final int prime = 31;
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288 int result = 1;
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289 result = prime * result + callSite.hashCode();
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290 result = prime * result + methodHandle.hashCode();
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291 return result;
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292 }
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293
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294 @Override
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295 public boolean equals(Object obj) {
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296 if (obj instanceof CallSiteTargetValue) {
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297 CallSiteTargetValue other = (CallSiteTargetValue) obj;
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298 return callSite.equals(other.callSite) && methodHandle.equals(other.methodHandle);
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299 }
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300 return false;
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301 }
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302
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303 @Override
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304 public String toString() {
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305 return "CallSiteTargetValue[callSite=" + callSite + ", methodHandle=" + methodHandle + "]";
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306 }
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307 }
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308
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309 private final Set<Assumption> assumptions = new HashSet<>();
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310
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311 /**
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312 * Returns whether any assumptions have been registered.
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313 *
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314 * @return {@code true} if at least one assumption has been registered, {@code false} otherwise.
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315 */
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316 public boolean isEmpty() {
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317 return assumptions.isEmpty();
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318 }
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319
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320 @Override
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321 public int hashCode() {
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322 throw new UnsupportedOperationException("hashCode");
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323 }
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324
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325 @Override
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326 public boolean equals(Object obj) {
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327 if (this == obj) {
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328 return true;
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329 }
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330 if (obj instanceof Assumptions) {
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331 Assumptions that = (Assumptions) obj;
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332 if (!this.assumptions.equals(that.assumptions)) {
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333 return false;
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334 }
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335 return true;
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336 }
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337 return false;
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338 }
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339
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340 @Override
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341 public Iterator<Assumption> iterator() {
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342 return assumptions.iterator();
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343 }
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344
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345 /**
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346 * Records an assumption that the specified type has no finalizable subclasses.
15729
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diff changeset
347 *
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348 * @param receiverType the type that is assumed to have no finalizable subclasses
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349 */
9012
2979aaac95af assumptions: enable NoFinalizableSubclass assumption
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diff changeset
350 public void recordNoFinalizableSubclassAssumption(ResolvedJavaType receiverType) {
2979aaac95af assumptions: enable NoFinalizableSubclass assumption
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351 record(new NoFinalizableSubclass(receiverType));
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352 }
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353
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diff changeset
354 /**
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5e3d1a68664e applied mx eclipseformat to all Java files
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355 * Records that {@code subtype} is the only concrete subtype in the class hierarchy below
5e3d1a68664e applied mx eclipseformat to all Java files
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diff changeset
356 * {@code context}.
15729
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diff changeset
357 *
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358 * @param context the root of the subtree of the class hierarchy that this assumptions is about
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359 * @param subtype the one concrete subtype
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diff changeset
360 */
5541
b4c406861c33 More renamings to drop Ri* prefix completely. Deleted graph.BitMap class and replaced with java.util.BitSet.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
361 public void recordConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) {
3733
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362 record(new ConcreteSubtype(context, subtype));
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363 }
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parents:
diff changeset
364
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
365 /**
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366 * Records that {@code impl} is the only possible concrete target for a virtual call to
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parents:
diff changeset
367 * {@code method} with a receiver of type {@code context}.
15729
59a85df7a418 Add some assertions and tests to TestResolvedJavaType.findUniqueConcreteSubtypeTest
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parents: 14158
diff changeset
368 *
3733
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369 * @param method a method that is the target of a virtual call
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diff changeset
370 * @param context the receiver type of a call to {@code method}
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parents:
diff changeset
371 * @param impl the concrete method that is the only possible target for the virtual call
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
372 */
5541
b4c406861c33 More renamings to drop Ri* prefix completely. Deleted graph.BitMap class and replaced with java.util.BitSet.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 5510
diff changeset
373 public void recordConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) {
3733
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diff changeset
374 record(new ConcreteMethod(method, context, impl));
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parents:
diff changeset
375 }
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
376
7223
e2ea829fafd9 use CHA more frequently for inlining
Christian Haeubl <haeubl@ssw.jku.at>
parents: 7220
diff changeset
377 public void record(Assumption assumption) {
19252
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
Doug Simon <doug.simon@oracle.com>
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diff changeset
378 assumptions.add(assumption);
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diff changeset
379 }
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diff changeset
380
19250
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Doug Simon <doug.simon@oracle.com>
parents: 19249
diff changeset
381 /**
19251
063e8873bd14 changed type of assumptions field in CompilationResult from Assumptions to Assumption[]
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parents: 19250
diff changeset
382 * Gets a copy of the assumptions recorded in this object as an array.
19250
8ab925a6f724 made Assumptions be part of a StructuredGraph
Doug Simon <doug.simon@oracle.com>
parents: 19249
diff changeset
383 */
19255
131fb3dd493b removed unnecessary use of an Assumptions object
Doug Simon <doug.simon@oracle.com>
parents: 19252
diff changeset
384 public Assumption[] toArray() {
19252
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
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parents: 19251
diff changeset
385 return assumptions.toArray(new Assumption[assumptions.size()]);
19250
8ab925a6f724 made Assumptions be part of a StructuredGraph
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parents: 19249
diff changeset
386 }
8ab925a6f724 made Assumptions be part of a StructuredGraph
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parents: 19249
diff changeset
387
8ab925a6f724 made Assumptions be part of a StructuredGraph
Doug Simon <doug.simon@oracle.com>
parents: 19249
diff changeset
388 /**
8ab925a6f724 made Assumptions be part of a StructuredGraph
Doug Simon <doug.simon@oracle.com>
parents: 19249
diff changeset
389 * Copies assumptions recorded by another {@link Assumptions} object into this object.
8ab925a6f724 made Assumptions be part of a StructuredGraph
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parents: 19249
diff changeset
390 */
19252
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diff changeset
391 public void record(Assumptions other) {
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
Doug Simon <doug.simon@oracle.com>
parents: 19251
diff changeset
392 assert other != this;
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
Doug Simon <doug.simon@oracle.com>
parents: 19251
diff changeset
393 assumptions.addAll(other.assumptions);
9699
9529ab567367 Drafted version of an inlining policy that uses the callee graph size as its metric.
Christian Haeubl <haeubl@ssw.jku.at>
parents: 9125
diff changeset
394 }
10611
1546866ebb8d First draft of Truffle graph caching.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9841
diff changeset
395
19250
8ab925a6f724 made Assumptions be part of a StructuredGraph
Doug Simon <doug.simon@oracle.com>
parents: 19249
diff changeset
396 @Override
8ab925a6f724 made Assumptions be part of a StructuredGraph
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parents: 19249
diff changeset
397 public String toString() {
19306
a0a760b0fb5f pulled method evolution dependencies out of Assumptions and directly into StructuredGraph
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parents: 19255
diff changeset
398 return "Assumptions[" + assumptions + "]";
10611
1546866ebb8d First draft of Truffle graph caching.
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parents: 9841
diff changeset
399 }
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400 }