Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/Assumptions.java @ 21789:5b9adb645217
fixed remnants of "graal" names in JVMCI code
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 08 Jun 2015 20:24:51 +0200 |
parents | 48c1ebd24120 |
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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.jvmci.meta; |
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24 |
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25 import java.lang.invoke.*; |
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26 import java.util.*; |
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27 |
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28 /** |
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29 * Class for recording assumptions made during compilation. |
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30 */ |
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31 public final class Assumptions implements Iterable<Assumptions.Assumption> { |
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32 |
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33 /** |
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34 * Abstract base class for assumptions. An assumption assumes a property of the runtime that may |
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35 * be invalidated by subsequent execution (e.g., that a class has no subclasses implementing |
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36 * {@link NoFinalizableSubclass Object.finalize()}). |
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37 */ |
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38 public abstract static class Assumption { |
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39 } |
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40 |
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41 /** |
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42 * A class for providing information that is only valid in association with a set of |
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43 * {@link Assumption}s. |
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44 * |
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45 * @param <T> |
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46 */ |
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47 public static class AssumptionResult<T> { |
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48 Assumption[] assumptions; |
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49 final T result; |
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50 |
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51 private static final Assumption[] EMPTY = new Assumption[0]; |
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52 |
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53 public AssumptionResult(T result, Assumption... assumptions) { |
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54 this.result = result; |
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55 this.assumptions = assumptions; |
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56 } |
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57 |
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58 public AssumptionResult(T result) { |
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59 this(result, EMPTY); |
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60 } |
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61 |
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62 public T getResult() { |
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63 return result; |
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64 } |
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65 |
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66 public boolean isAssumptionFree() { |
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67 return assumptions.length == 0; |
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68 } |
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69 |
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70 public void add(AssumptionResult<T> other) { |
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71 Assumption[] newAssumptions = Arrays.copyOf(this.assumptions, this.assumptions.length + other.assumptions.length); |
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72 System.arraycopy(other.assumptions, 0, newAssumptions, this.assumptions.length, other.assumptions.length); |
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73 this.assumptions = newAssumptions; |
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74 } |
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75 } |
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76 |
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77 /** |
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78 * An assumption that a given class has no subclasses implementing {@link Object#finalize()}). |
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79 */ |
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80 public static final class NoFinalizableSubclass extends Assumption { |
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81 |
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82 private ResolvedJavaType receiverType; |
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83 |
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84 public NoFinalizableSubclass(ResolvedJavaType receiverType) { |
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85 this.receiverType = receiverType; |
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86 } |
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87 |
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88 @Override |
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89 public int hashCode() { |
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90 return 31 + receiverType.hashCode(); |
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91 } |
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92 |
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93 @Override |
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94 public boolean equals(Object obj) { |
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95 if (obj instanceof NoFinalizableSubclass) { |
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96 NoFinalizableSubclass other = (NoFinalizableSubclass) obj; |
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97 return other.receiverType.equals(receiverType); |
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98 } |
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99 return false; |
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100 } |
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101 |
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102 @Override |
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103 public String toString() { |
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104 return "NoFinalizableSubclass[receiverType=" + receiverType.toJavaName() + "]"; |
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105 } |
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106 |
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107 } |
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108 |
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109 /** |
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110 * An assumption that a given abstract or interface type has one direct concrete subtype. There |
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111 * is no requirement that the subtype is a leaf type. |
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112 */ |
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113 public static final class ConcreteSubtype extends Assumption { |
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114 |
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115 /** |
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116 * Type the assumption is made about. |
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117 */ |
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118 public final ResolvedJavaType context; |
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119 |
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120 /** |
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121 * Assumed concrete sub-type of the context type. |
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122 */ |
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123 public final ResolvedJavaType subtype; |
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124 |
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125 public ConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) { |
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126 this.context = context; |
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127 this.subtype = subtype; |
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128 assert context.isAbstract(); |
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129 assert subtype.isConcrete() || context.isInterface() : subtype.toString() + " : " + context.toString(); |
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130 assert !subtype.isArray() || subtype.getElementalType().isFinal() : subtype.toString() + " : " + context.toString(); |
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131 } |
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132 |
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133 @Override |
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134 public int hashCode() { |
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135 final int prime = 31; |
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136 int result = 1; |
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137 result = prime * result + context.hashCode(); |
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138 result = prime * result + subtype.hashCode(); |
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139 return result; |
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140 } |
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141 |
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142 @Override |
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143 public boolean equals(Object obj) { |
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144 if (obj instanceof ConcreteSubtype) { |
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145 ConcreteSubtype other = (ConcreteSubtype) obj; |
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146 return other.context.equals(context) && other.subtype.equals(subtype); |
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147 } |
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148 return false; |
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149 } |
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150 |
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151 @Override |
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152 public String toString() { |
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153 return "ConcreteSubtype[context=" + context.toJavaName() + ", subtype=" + subtype.toJavaName() + "]"; |
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154 } |
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155 } |
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156 |
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157 /** |
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158 * An assumption that a given type has no subtypes. |
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159 */ |
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160 public static final class LeafType extends Assumption { |
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161 |
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162 /** |
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163 * Type the assumption is made about. |
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164 */ |
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165 public final ResolvedJavaType context; |
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166 |
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167 public LeafType(ResolvedJavaType context) { |
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168 this.context = context; |
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169 } |
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170 |
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171 @Override |
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172 public int hashCode() { |
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173 final int prime = 31; |
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174 int result = 1; |
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175 result = prime * result + context.hashCode(); |
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176 return result; |
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177 } |
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178 |
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179 @Override |
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180 public boolean equals(Object obj) { |
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181 if (obj instanceof LeafType) { |
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182 LeafType other = (LeafType) obj; |
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183 return other.context.equals(context); |
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184 } |
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185 return false; |
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186 } |
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187 |
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188 @Override |
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189 public String toString() { |
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190 return "LeafSubtype[context=" + context.toJavaName() + "]"; |
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191 } |
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192 } |
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193 |
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194 /** |
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195 * An assumption that a given virtual method has a given unique implementation. |
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196 */ |
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197 public static final class ConcreteMethod extends Assumption { |
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198 |
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199 /** |
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200 * A virtual (or interface) method whose unique implementation for the receiver type in |
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201 * {@link #context} is {@link #impl}. |
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202 */ |
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203 public final ResolvedJavaMethod method; |
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204 |
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205 /** |
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206 * A receiver type. |
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207 */ |
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208 public final ResolvedJavaType context; |
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209 |
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210 /** |
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211 * The unique implementation of {@link #method} for {@link #context}. |
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212 */ |
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213 public final ResolvedJavaMethod impl; |
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214 |
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215 public ConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) { |
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216 this.method = method; |
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217 this.context = context; |
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218 this.impl = impl; |
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219 } |
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220 |
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221 @Override |
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222 public int hashCode() { |
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223 final int prime = 31; |
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224 int result = 1; |
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225 result = prime * result + method.hashCode(); |
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226 result = prime * result + context.hashCode(); |
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227 result = prime * result + impl.hashCode(); |
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228 return result; |
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229 } |
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230 |
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231 @Override |
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232 public boolean equals(Object obj) { |
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233 if (obj instanceof ConcreteMethod) { |
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234 ConcreteMethod other = (ConcreteMethod) obj; |
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235 return other.method.equals(method) && other.context.equals(context) && other.impl.equals(impl); |
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236 } |
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237 return false; |
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238 } |
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239 |
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240 @Override |
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241 public String toString() { |
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242 return "ConcreteMethod[method=" + method.format("%H.%n(%p)%r") + ", context=" + context.toJavaName() + ", impl=" + impl.format("%H.%n(%p)%r") + "]"; |
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243 } |
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244 } |
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245 |
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246 /** |
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247 * An assumption that a given call site's method handle did not change. |
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248 */ |
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249 public static final class CallSiteTargetValue extends Assumption { |
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250 |
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251 public final CallSite callSite; |
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252 public final MethodHandle methodHandle; |
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253 |
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254 public CallSiteTargetValue(CallSite callSite, MethodHandle methodHandle) { |
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255 this.callSite = callSite; |
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256 this.methodHandle = methodHandle; |
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257 } |
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258 |
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259 @Override |
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260 public int hashCode() { |
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261 final int prime = 31; |
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262 int result = 1; |
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263 result = prime * result + callSite.hashCode(); |
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264 result = prime * result + methodHandle.hashCode(); |
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265 return result; |
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266 } |
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267 |
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268 @Override |
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269 public boolean equals(Object obj) { |
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270 if (obj instanceof CallSiteTargetValue) { |
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271 CallSiteTargetValue other = (CallSiteTargetValue) obj; |
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272 return callSite.equals(other.callSite) && methodHandle.equals(other.methodHandle); |
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273 } |
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274 return false; |
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275 } |
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276 |
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277 @Override |
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278 public String toString() { |
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279 return "CallSiteTargetValue[callSite=" + callSite + ", methodHandle=" + methodHandle + "]"; |
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280 } |
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281 } |
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282 |
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283 private final Set<Assumption> assumptions = new HashSet<>(); |
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284 |
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285 /** |
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286 * Returns whether any assumptions have been registered. |
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287 * |
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288 * @return {@code true} if at least one assumption has been registered, {@code false} otherwise. |
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289 */ |
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290 public boolean isEmpty() { |
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291 return assumptions.isEmpty(); |
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292 } |
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293 |
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294 @Override |
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295 public int hashCode() { |
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296 throw new UnsupportedOperationException("hashCode"); |
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297 } |
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298 |
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299 @Override |
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300 public boolean equals(Object obj) { |
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301 if (this == obj) { |
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302 return true; |
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303 } |
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304 if (obj instanceof Assumptions) { |
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305 Assumptions that = (Assumptions) obj; |
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306 if (!this.assumptions.equals(that.assumptions)) { |
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307 return false; |
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308 } |
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309 return true; |
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310 } |
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311 return false; |
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312 } |
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313 |
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314 @Override |
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315 public Iterator<Assumption> iterator() { |
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316 return assumptions.iterator(); |
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317 } |
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318 |
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319 /** |
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320 * Records an assumption that the specified type has no finalizable subclasses. |
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321 * |
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322 * @param receiverType the type that is assumed to have no finalizable subclasses |
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323 */ |
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324 public void recordNoFinalizableSubclassAssumption(ResolvedJavaType receiverType) { |
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325 record(new NoFinalizableSubclass(receiverType)); |
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326 } |
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327 |
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328 /** |
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329 * Records that {@code subtype} is the only concrete subtype in the class hierarchy below |
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330 * {@code context}. |
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331 * |
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332 * @param context the root of the subtree of the class hierarchy that this assumptions is about |
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333 * @param subtype the one concrete subtype |
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334 */ |
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335 public void recordConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) { |
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336 record(new ConcreteSubtype(context, subtype)); |
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337 } |
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338 |
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339 /** |
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340 * Records that {@code impl} is the only possible concrete target for a virtual call to |
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341 * {@code method} with a receiver of type {@code context}. |
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342 * |
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343 * @param method a method that is the target of a virtual call |
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344 * @param context the receiver type of a call to {@code method} |
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345 * @param impl the concrete method that is the only possible target for the virtual call |
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346 */ |
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347 public void recordConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) { |
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348 record(new ConcreteMethod(method, context, impl)); |
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349 } |
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350 |
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351 public void record(AssumptionResult<?> result) { |
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352 for (Assumption assumption : result.assumptions) { |
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353 record(assumption); |
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354 } |
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355 } |
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356 |
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357 public void record(Assumption assumption) { |
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358 assumptions.add(assumption); |
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359 } |
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360 |
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361 /** |
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362 * Gets a copy of the assumptions recorded in this object as an array. |
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363 */ |
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364 public Assumption[] toArray() { |
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365 return assumptions.toArray(new Assumption[assumptions.size()]); |
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366 } |
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367 |
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368 /** |
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369 * Copies assumptions recorded by another {@link Assumptions} object into this object. |
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370 */ |
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371 public void record(Assumptions other) { |
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372 assert other != this; |
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373 assumptions.addAll(other.assumptions); |
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Drafted version of an inlining policy that uses the callee graph size as its metric.
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374 } |
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375 |
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376 @Override |
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377 public String toString() { |
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378 return "Assumptions[" + assumptions + "]"; |
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379 } |
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380 } |