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annotate graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/Assumptions.java @ 19255:131fb3dd493b

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removed unnecessary use of an Assumptions object
author Doug Simon <doug.simon@oracle.com>
date Wed, 11 Feb 2015 13:49:08 +0100
parents f91bf352023a
children a0a760b0fb5f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 com.oracle.graal.api.code;
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24
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25 import java.io.*;
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26 import java.lang.invoke.*;
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27 import java.util.*;
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28
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29 import com.oracle.graal.api.meta.*;
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31 /**
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32 * Class for recording assumptions made during compilation. {@link OptimisticAssumption}s can only
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33 * be recorded in an {@link Assumptions} object if it {@linkplain #useOptimisticAssumptions()
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34 * allows} them.
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35 */
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36 public final class Assumptions implements Serializable, Iterable<Assumptions.Assumption> {
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37
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38 private static final long serialVersionUID = 5152062717588239131L;
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39
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40 /**
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41 * Abstract base class for assumptions.
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42 */
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43 public abstract static class Assumption implements Serializable {
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44
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45 private static final long serialVersionUID = -1936652569665112915L;
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46 }
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47
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48 /**
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49 * Abstract base class for optimistic assumptions. An optimistic assumption assumes a property
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50 * of the runtime that may be invalidated by subsequent execution (e.g., that a class has no
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51 * subclasses implementing {@link NoFinalizableSubclass Object.finalize()}). A non-optimistic
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52 * assumption assumes a property that will most likely only be invalidated by an external
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53 * interface to the runtime (e.g., a {@linkplain MethodContents breakpoint is set or a class is
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54 * redefined}).
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55 */
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56 public abstract static class OptimisticAssumption extends Assumption {
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57
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58 private static final long serialVersionUID = -1936652569665112932L;
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59 }
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60
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61 /**
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62 * An optimistic assumption that a given class has no subclasses implementing
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63 * {@link Object#finalize()}).
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64 */
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65 public static final class NoFinalizableSubclass extends OptimisticAssumption {
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66
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67 private static final long serialVersionUID = 6451169735564055081L;
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68
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69 private ResolvedJavaType receiverType;
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70
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71 public NoFinalizableSubclass(ResolvedJavaType receiverType) {
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72 this.receiverType = receiverType;
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73 }
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74
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75 @Override
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76 public int hashCode() {
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77 return 31 + receiverType.hashCode();
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78 }
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79
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80 @Override
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81 public boolean equals(Object obj) {
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82 if (obj instanceof NoFinalizableSubclass) {
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83 NoFinalizableSubclass other = (NoFinalizableSubclass) obj;
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84 return other.receiverType.equals(receiverType);
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85 }
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86 return false;
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87 }
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88
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89 @Override
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90 public String toString() {
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91 return "NoFinalizableSubclass[receiverType=" + receiverType.toJavaName() + "]";
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92 }
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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 * An optimistic assumption that a given type has a given unique subtype.
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98 */
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99 public static final class ConcreteSubtype extends OptimisticAssumption {
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100
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101 private static final long serialVersionUID = -1457173265437676252L;
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102
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103 /**
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104 * Type the assumption is made about.
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105 */
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106 public final ResolvedJavaType context;
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107
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108 /**
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109 * Assumed unique concrete sub-type of the context type.
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110 */
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111 public final ResolvedJavaType subtype;
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112
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113 public ConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) {
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114 this.context = context;
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115 this.subtype = subtype;
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116 assert subtype.isConcrete() : subtype.toString() + " : " + context.toString();
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117 assert !subtype.isArray() || subtype.getElementalType().isFinal() : subtype.toString() + " : " + context.toString();
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118 }
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119
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120 @Override
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121 public int hashCode() {
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122 final int prime = 31;
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123 int result = 1;
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124 result = prime * result + context.hashCode();
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125 result = prime * result + subtype.hashCode();
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126 return result;
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127 }
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128
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129 @Override
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130 public boolean equals(Object obj) {
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131 if (obj instanceof ConcreteSubtype) {
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132 ConcreteSubtype other = (ConcreteSubtype) obj;
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133 return other.context.equals(context) && other.subtype.equals(subtype);
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134 }
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135 return false;
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136 }
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137
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138 @Override
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139 public String toString() {
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140 return "ConcreteSubtype[context=" + context.toJavaName() + ", subtype=" + subtype.toJavaName() + "]";
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141 }
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142 }
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143
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144 /**
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145 * An optimistic assumption that a given virtual method has a given unique implementation.
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146 */
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147 public static final class ConcreteMethod extends OptimisticAssumption {
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148
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149 private static final long serialVersionUID = -7636746737947390059L;
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150
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151 /**
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152 * A virtual (or interface) method whose unique implementation for the receiver type in
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153 * {@link #context} is {@link #impl}.
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154 */
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155 public final ResolvedJavaMethod method;
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156
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157 /**
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158 * A receiver type.
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159 */
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160 public final ResolvedJavaType context;
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161
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162 /**
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163 * The unique implementation of {@link #method} for {@link #context}.
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164 */
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165 public final ResolvedJavaMethod impl;
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166
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167 public ConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) {
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168 this.method = method;
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169 this.context = context;
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170 this.impl = impl;
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171 }
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172
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173 @Override
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174 public int hashCode() {
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175 final int prime = 31;
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176 int result = 1;
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177 result = prime * result + method.hashCode();
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178 result = prime * result + context.hashCode();
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179 result = prime * result + impl.hashCode();
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180 return result;
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181 }
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182
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183 @Override
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184 public boolean equals(Object obj) {
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185 if (obj instanceof ConcreteMethod) {
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186 ConcreteMethod other = (ConcreteMethod) obj;
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187 return other.method.equals(method) && other.context.equals(context) && other.impl.equals(impl);
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188 }
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189 return false;
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190 }
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191
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192 @Override
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193 public String toString() {
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194 return "ConcreteMethod[method=" + method.format("%H.%n(%p)%r") + ", context=" + context.toJavaName() + ", impl=" + impl.format("%H.%n(%p)%r") + "]";
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195 }
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196 }
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197
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198 /**
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199 * An non-optimistic assumption that the bytecodes of a given method used during compilation
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200 * will not change. This kind of dependency may be used to invalidate and deoptimize compiled
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201 * code when:
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202 * <ul>
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203 * <li>one of its constituent methods is redefined or</li>
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204 * <li>a breakpoint is set in one of its constituent methods and the runtime only implements
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205 * breakpoint support in non-compiled code.
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206 * </ul>
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207 */
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208 public static final class MethodContents extends Assumption {
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209
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210 private static final long serialVersionUID = -4821594103928571659L;
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211
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212 public final ResolvedJavaMethod method;
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213
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214 public MethodContents(ResolvedJavaMethod method) {
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215 this.method = method;
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216 }
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217
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218 @Override
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219 public int hashCode() {
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220 return 31 + method.hashCode();
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221 }
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222
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223 @Override
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224 public boolean equals(Object obj) {
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225 if (obj instanceof MethodContents) {
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226 MethodContents other = (MethodContents) obj;
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227 return other.method.equals(method);
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228 }
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229 return false;
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230 }
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231
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232 @Override
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233 public String toString() {
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234 return "MethodContents[method=" + method.format("%H.%n(%p)%r") + "]";
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235 }
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236 }
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237
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238 /**
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239 * An optimistic assumption that a given call site's method handle did not change.
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240 */
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241 public static final class CallSiteTargetValue extends OptimisticAssumption {
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242
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243 private static final long serialVersionUID = 1732459941784550371L;
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244
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245 public final CallSite callSite;
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246 public final MethodHandle methodHandle;
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247
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248 public CallSiteTargetValue(CallSite callSite, MethodHandle methodHandle) {
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249 this.callSite = callSite;
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250 this.methodHandle = methodHandle;
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251 }
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252
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253 @Override
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254 public int hashCode() {
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255 final int prime = 31;
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256 int result = 1;
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257 result = prime * result + callSite.hashCode();
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258 result = prime * result + methodHandle.hashCode();
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259 return result;
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260 }
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261
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262 @Override
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263 public boolean equals(Object obj) {
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264 if (obj instanceof CallSiteTargetValue) {
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265 CallSiteTargetValue other = (CallSiteTargetValue) obj;
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266 return callSite.equals(other.callSite) && methodHandle.equals(other.methodHandle);
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267 }
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268 return false;
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269 }
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270
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271 @Override
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272 public String toString() {
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273 return "CallSiteTargetValue[callSite=" + callSite + ", methodHandle=" + methodHandle + "]";
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274 }
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275 }
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276
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277 private Set<Assumption> assumptions;
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278
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279 /**
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280 * Specifies whether {@link OptimisticAssumption}s can be made.
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281 */
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282 private boolean allowOptimisticAssumptions;
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283
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284 public static final boolean ALLOW_OPTIMISTIC_ASSUMPTIONS = true;
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285 public static final boolean DONT_ALLOW_OPTIMISTIC_ASSUMPTIONS = false;
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286
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287 /**
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288 * Creates an object for recording assumptions.
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289 *
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290 * @param allowOptimisticAssumptions specifies whether {@link OptimisticAssumption}s can be
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291 * recorded in this object
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292 */
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293 public Assumptions(boolean allowOptimisticAssumptions) {
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294 this.allowOptimisticAssumptions = allowOptimisticAssumptions;
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295 assumptions = new HashSet<>();
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296 }
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297
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298 /**
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299 * Returns whether any assumptions have been registered.
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300 *
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301 * @return {@code true} if at least one assumption has been registered, {@code false} otherwise.
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302 */
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303 public boolean isEmpty() {
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304 return assumptions.isEmpty();
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305 }
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306
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307 /**
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308 * Determines whether {@link OptimisticAssumption}s can be made.
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309 */
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310 public boolean useOptimisticAssumptions() {
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311 return allowOptimisticAssumptions;
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312 }
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313
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314 @Override
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315 public int hashCode() {
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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316 throw new UnsupportedOperationException("hashCode");
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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317 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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318
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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319 @Override
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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320 public boolean equals(Object obj) {
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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321 if (this == obj) {
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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322 return true;
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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323 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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324 if (obj instanceof Assumptions) {
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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325 Assumptions that = (Assumptions) obj;
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326 if (this.allowOptimisticAssumptions != that.allowOptimisticAssumptions || !this.assumptions.equals(that.assumptions)) {
18342
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327 return false;
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328 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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329 return true;
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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330 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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331 return false;
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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diff changeset
332 }
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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333
d60dd21329f2 implemented .equals() for CompilationResult and the objects it encapsulates
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334 @Override
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335 public Iterator<Assumption> iterator() {
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336 return assumptions.iterator();
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337 }
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338
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339 /**
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340 * Records an assumption that the specified type has no finalizable subclasses.
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341 *
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342 * @param receiverType the type that is assumed to have no finalizable subclasses
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343 */
9012
2979aaac95af assumptions: enable NoFinalizableSubclass assumption
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diff changeset
344 public void recordNoFinalizableSubclassAssumption(ResolvedJavaType receiverType) {
2979aaac95af assumptions: enable NoFinalizableSubclass assumption
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345 record(new NoFinalizableSubclass(receiverType));
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346 }
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347
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348 /**
7530
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349 * 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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350 * {@code context}.
15729
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parents: 14160
diff changeset
351 *
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352 * @param context the root of the subtree of the class hierarchy that this assumptions is about
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353 * @param subtype the one concrete subtype
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354 */
5541
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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355 public void recordConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) {
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356 record(new ConcreteSubtype(context, subtype));
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diff changeset
357 }
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358
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diff changeset
359 /**
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360 * Records that {@code impl} is the only possible concrete target for a virtual call to
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diff changeset
361 * {@code method} with a receiver of type {@code context}.
15729
59a85df7a418 Add some assertions and tests to TestResolvedJavaType.findUniqueConcreteSubtypeTest
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diff changeset
362 *
3733
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363 * @param method a method that is the target of a virtual call
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parents:
diff changeset
364 * @param context the receiver type of a call to {@code method}
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
365 * @param impl the concrete method that is the only possible target for the virtual call
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parents:
diff changeset
366 */
5541
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
367 public void recordConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) {
3733
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diff changeset
368 record(new ConcreteMethod(method, context, impl));
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parents:
diff changeset
369 }
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parents:
diff changeset
370
4670
41034914e2ee add MethodContents assumption to fix debbugging issue
Lukas Stadler <lukas.stadler@jku.at>
parents: 4199
diff changeset
371 /**
41034914e2ee add MethodContents assumption to fix debbugging issue
Lukas Stadler <lukas.stadler@jku.at>
parents: 4199
diff changeset
372 * Records that {@code method} was used during the compilation.
15729
59a85df7a418 Add some assertions and tests to TestResolvedJavaType.findUniqueConcreteSubtypeTest
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 14160
diff changeset
373 *
4670
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Lukas Stadler <lukas.stadler@jku.at>
parents: 4199
diff changeset
374 * @param method a method whose contents were used
41034914e2ee add MethodContents assumption to fix debbugging issue
Lukas Stadler <lukas.stadler@jku.at>
parents: 4199
diff changeset
375 */
5541
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
376 public void recordMethodContents(ResolvedJavaMethod method) {
4670
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parents: 4199
diff changeset
377 record(new MethodContents(method));
41034914e2ee add MethodContents assumption to fix debbugging issue
Lukas Stadler <lukas.stadler@jku.at>
parents: 4199
diff changeset
378 }
41034914e2ee add MethodContents assumption to fix debbugging issue
Lukas Stadler <lukas.stadler@jku.at>
parents: 4199
diff changeset
379
7223
e2ea829fafd9 use CHA more frequently for inlining
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parents: 7220
diff changeset
380 public void record(Assumption assumption) {
19249
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diff changeset
381 assert allowOptimisticAssumptions || !(assumption instanceof OptimisticAssumption) : "cannot make optimistic assumption: " + assumption;
19252
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diff changeset
382 assumptions.add(assumption);
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diff changeset
383 }
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diff changeset
384
19250
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Doug Simon <doug.simon@oracle.com>
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diff changeset
385 /**
19251
063e8873bd14 changed type of assumptions field in CompilationResult from Assumptions to Assumption[]
Doug Simon <doug.simon@oracle.com>
parents: 19250
diff changeset
386 * 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
387 */
19255
131fb3dd493b removed unnecessary use of an Assumptions object
Doug Simon <doug.simon@oracle.com>
parents: 19252
diff changeset
388 public Assumption[] toArray() {
19252
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
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diff changeset
389 return assumptions.toArray(new Assumption[assumptions.size()]);
19250
8ab925a6f724 made Assumptions be part of a StructuredGraph
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diff changeset
390 }
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parents: 19249
diff changeset
391
8ab925a6f724 made Assumptions be part of a StructuredGraph
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parents: 19249
diff changeset
392 /**
8ab925a6f724 made Assumptions be part of a StructuredGraph
Doug Simon <doug.simon@oracle.com>
parents: 19249
diff changeset
393 * Copies assumptions recorded by another {@link Assumptions} object into this object.
8ab925a6f724 made Assumptions be part of a StructuredGraph
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diff changeset
394 */
19252
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parents: 19251
diff changeset
395 public void record(Assumptions other) {
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
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diff changeset
396 assert other != this;
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
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diff changeset
397 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
398 }
10611
1546866ebb8d First draft of Truffle graph caching.
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parents: 9841
diff changeset
399
19250
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diff changeset
400 @Override
8ab925a6f724 made Assumptions be part of a StructuredGraph
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diff changeset
401 public String toString() {
19252
f91bf352023a replaced use of expandable array with HashSet for recording assumptions
Doug Simon <doug.simon@oracle.com>
parents: 19251
diff changeset
402 return "Assumptions{optimistic=" + allowOptimisticAssumptions + ", assumptions=" + assumptions + "}";
10611
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9841
diff changeset
403 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
404 }