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annotate graal/com.oracle.graal.api.code/src/com/oracle/graal/api/code/Assumptions.java @ 16217:561070049e73

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implement Canonicalizable.Binary in the BinaryNode hierarchy
author Lukas Stadler <lukas.stadler@oracle.com>
date Wed, 25 Jun 2014 16:54:56 +0200
parents 59a85df7a418
children 92f75d104b4b
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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 static com.oracle.graal.api.meta.MetaUtil.*;
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26
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27 import java.io.*;
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28 import java.lang.invoke.*;
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29 import java.util.*;
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30
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31 import com.oracle.graal.api.meta.*;
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32
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33 /**
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34 * Class for recording optimistic assumptions made during compilation.
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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 public static final class NoFinalizableSubclass extends Assumption {
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49
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50 private static final long serialVersionUID = 6451169735564055081L;
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51
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52 private ResolvedJavaType receiverType;
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53
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54 public NoFinalizableSubclass(ResolvedJavaType receiverType) {
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55 this.receiverType = receiverType;
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56 }
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57
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58 @Override
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59 public int hashCode() {
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60 return 31 + receiverType.hashCode();
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61 }
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62
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63 @Override
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64 public boolean equals(Object obj) {
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65 if (obj instanceof NoFinalizableSubclass) {
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66 NoFinalizableSubclass other = (NoFinalizableSubclass) obj;
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67 return other.receiverType.equals(receiverType);
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68 }
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69 return false;
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70 }
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71
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72 @Override
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73 public String toString() {
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74 return "NoFinalizableSubclass[receiverType=" + toJavaName(receiverType) + "]";
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75 }
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76
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77 }
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78
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79 /**
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80 * An assumption about a unique subtype of a given type.
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81 */
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82 public static final class ConcreteSubtype extends Assumption {
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83
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84 private static final long serialVersionUID = -1457173265437676252L;
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85
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86 /**
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87 * Type the assumption is made about.
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88 */
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89 public final ResolvedJavaType context;
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90
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91 /**
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92 * Assumed unique concrete sub-type of the context type.
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93 */
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94 public final ResolvedJavaType subtype;
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95
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96 public ConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) {
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97 this.context = context;
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98 this.subtype = subtype;
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99 assert !subtype.isAbstract() : subtype.toString() + " : " + context.toString();
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100 assert !subtype.isArray() || getElementalType(subtype).isFinal() : subtype.toString() + " : " + context.toString();
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101 }
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102
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103 @Override
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104 public int hashCode() {
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105 final int prime = 31;
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106 int result = 1;
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107 result = prime * result + context.hashCode();
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108 result = prime * result + subtype.hashCode();
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109 return result;
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110 }
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111
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112 @Override
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113 public boolean equals(Object obj) {
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114 if (obj instanceof ConcreteSubtype) {
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115 ConcreteSubtype other = (ConcreteSubtype) obj;
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116 return other.context.equals(context) && other.subtype.equals(subtype);
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117 }
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118 return false;
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119 }
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120
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121 @Override
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122 public String toString() {
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123 return "ConcreteSubtype[context=" + toJavaName(context) + ", subtype=" + toJavaName(subtype) + "]";
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124 }
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125 }
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126
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127 /**
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128 * An assumption about a unique implementation of a virtual method.
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129 */
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130 public static final class ConcreteMethod extends Assumption {
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131
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132 private static final long serialVersionUID = -7636746737947390059L;
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133
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134 /**
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135 * A virtual (or interface) method whose unique implementation for the receiver type in
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136 * {@link #context} is {@link #impl}.
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137 */
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138 public final ResolvedJavaMethod method;
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139
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140 /**
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141 * A receiver type.
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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 * The unique implementation of {@link #method} for {@link #context}.
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147 */
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148 public final ResolvedJavaMethod impl;
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149
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150 public ConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) {
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151 this.method = method;
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152 this.context = context;
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153 this.impl = impl;
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154 }
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155
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156 @Override
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157 public int hashCode() {
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158 final int prime = 31;
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159 int result = 1;
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160 result = prime * result + method.hashCode();
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161 result = prime * result + context.hashCode();
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162 result = prime * result + impl.hashCode();
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163 return result;
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164 }
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165
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166 @Override
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167 public boolean equals(Object obj) {
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168 if (obj instanceof ConcreteMethod) {
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169 ConcreteMethod other = (ConcreteMethod) obj;
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170 return other.method.equals(method) && other.context.equals(context) && other.impl.equals(impl);
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171 }
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172 return false;
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173 }
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174
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175 @Override
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176 public String toString() {
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177 return "ConcreteMethod[method=" + format("%H.%n(%p)", method) + ", context=" + toJavaName(context) + ", impl=" + format("%H.%n(%p)", impl) + "]";
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178 }
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179 }
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180
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181 /**
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182 * An assumption that specified that a method was used during the compilation.
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183 */
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184 public static final class MethodContents extends Assumption {
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185
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186 private static final long serialVersionUID = -4821594103928571659L;
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187
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188 public final ResolvedJavaMethod method;
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189
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190 public MethodContents(ResolvedJavaMethod method) {
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191 this.method = method;
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192 }
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193
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194 @Override
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195 public int hashCode() {
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196 return 31 + method.hashCode();
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197 }
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198
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199 @Override
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200 public boolean equals(Object obj) {
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201 if (obj instanceof MethodContents) {
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202 MethodContents other = (MethodContents) obj;
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203 return other.method.equals(method);
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204 }
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205 return false;
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206 }
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207
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208 @Override
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209 public String toString() {
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210 return "MethodContents[method=" + format("%H.%n(%p)", method) + "]";
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211 }
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212 }
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213
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214 /**
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215 * Assumption that a call site's method handle did not change.
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216 */
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217 public static final class CallSiteTargetValue extends Assumption {
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218
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219 private static final long serialVersionUID = 1732459941784550371L;
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220
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221 public final CallSite callSite;
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222 public final MethodHandle methodHandle;
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223
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224 public CallSiteTargetValue(CallSite callSite, MethodHandle methodHandle) {
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225 this.callSite = callSite;
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226 this.methodHandle = methodHandle;
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227 }
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228
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229 @Override
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230 public int hashCode() {
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231 final int prime = 31;
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232 int result = 1;
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233 result = prime * result + callSite.hashCode();
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234 result = prime * result + methodHandle.hashCode();
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235 return result;
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236 }
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237
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238 @Override
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239 public boolean equals(Object obj) {
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240 if (obj instanceof CallSiteTargetValue) {
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241 CallSiteTargetValue other = (CallSiteTargetValue) obj;
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242 return other.callSite == callSite && other.methodHandle == methodHandle;
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243 }
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244 return false;
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245 }
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246
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247 @Override
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248 public String toString() {
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249 return "CallSiteTargetValue[callSite=" + callSite + ", methodHandle=" + methodHandle + "]";
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250 }
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251 }
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252
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253 /**
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254 * Array with the assumptions. This field is directly accessed from C++ code in the
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255 * Graal/HotSpot implementation.
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256 */
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257 private Assumption[] list;
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258 private boolean useOptimisticAssumptions;
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259 private int count;
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260
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261 public Assumptions(boolean useOptimisticAssumptions) {
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262 this.useOptimisticAssumptions = useOptimisticAssumptions;
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263 list = new Assumption[4];
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264 }
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265
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266 /**
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267 * Returns whether any assumptions have been registered.
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268 *
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269 * @return {@code true} if at least one assumption has been registered, {@code false} otherwise.
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270 */
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271 public boolean isEmpty() {
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272 return count == 0;
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273 }
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274
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275 public boolean useOptimisticAssumptions() {
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276 return useOptimisticAssumptions;
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277 }
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278
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279 @Override
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280 public Iterator<Assumption> iterator() {
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281 return new Iterator<Assumptions.Assumption>() {
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282
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283 int index;
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284
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285 @Override
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286 public void remove() {
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287 throw new UnsupportedOperationException();
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288 }
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289
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290 @Override
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291 public Assumption next() {
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292 if (index >= count) {
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293 throw new NoSuchElementException();
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294 }
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295 return list[index++];
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296 }
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297
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298 @Override
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299 public boolean hasNext() {
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300 return index < count;
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301 }
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302 };
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303 }
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304
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305 /**
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306 * Records an assumption that the specified type has no finalizable subclasses.
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307 *
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308 * @param receiverType the type that is assumed to have no finalizable subclasses
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309 */
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310 public void recordNoFinalizableSubclassAssumption(ResolvedJavaType receiverType) {
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311 assert useOptimisticAssumptions;
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312 record(new NoFinalizableSubclass(receiverType));
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313 }
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314
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315 /**
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316 * Records that {@code subtype} is the only concrete subtype in the class hierarchy below
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317 * {@code context}.
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318 *
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319 * @param context the root of the subtree of the class hierarchy that this assumptions is about
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320 * @param subtype the one concrete subtype
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321 */
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322 public void recordConcreteSubtype(ResolvedJavaType context, ResolvedJavaType subtype) {
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323 assert useOptimisticAssumptions;
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324 record(new ConcreteSubtype(context, subtype));
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325 }
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326
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327 /**
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328 * Records that {@code impl} is the only possible concrete target for a virtual call to
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329 * {@code method} with a receiver of type {@code context}.
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diff changeset
330 *
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331 * @param method a method that is the target of a virtual call
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332 * @param context the receiver type of a call to {@code method}
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333 * @param impl the concrete method that is the only possible target for the virtual call
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334 */
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335 public void recordConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType context, ResolvedJavaMethod impl) {
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336 assert useOptimisticAssumptions;
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337 record(new ConcreteMethod(method, context, impl));
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338 }
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339
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diff changeset
340 /**
41034914e2ee add MethodContents assumption to fix debbugging issue
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341 * Records that {@code method} was used during the compilation.
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diff changeset
342 *
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343 * @param method a method whose contents were used
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344 */
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345 public void recordMethodContents(ResolvedJavaMethod method) {
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346 record(new MethodContents(method));
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347 }
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348
7223
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349 public void record(Assumption assumption) {
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350 if (list == null) {
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351 list = new Assumption[4];
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352 } else {
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353 for (int i = 0; i < count; ++i) {
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354 if (assumption.equals(list[i])) {
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355 return;
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356 }
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357 }
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358 }
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359 if (list.length == count) {
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360 Assumption[] newList = new Assumption[list.length * 2];
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361 for (int i = 0; i < list.length; ++i) {
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362 newList[i] = list[i];
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363 }
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364 list = newList;
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365 }
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366 list[count] = assumption;
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367 count++;
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368 }
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369
9841
e9d8f135f203 Assumptions: initialize list in constructor and add getter
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370 public Assumption[] getAssumptions() {
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371 return list;
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diff changeset
372 }
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373
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9529ab567367 Drafted version of an inlining policy that uses the callee graph size as its metric.
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diff changeset
374 public void record(Assumptions assumptions) {
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diff changeset
375 for (int i = 0; i < assumptions.count; i++) {
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diff changeset
376 record(assumptions.list[i]);
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377 }
9529ab567367 Drafted version of an inlining policy that uses the callee graph size as its metric.
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diff changeset
378 }
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379
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380 public void print(PrintStream out) {
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381 List<Assumption> nonNullList = new ArrayList<>();
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diff changeset
382 if (list != null) {
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diff changeset
383 for (int i = 0; i < list.length; ++i) {
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384 Assumption a = list[i];
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385 if (a != null) {
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diff changeset
386 nonNullList.add(a);
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diff changeset
387 }
1546866ebb8d First draft of Truffle graph caching.
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diff changeset
388 }
1546866ebb8d First draft of Truffle graph caching.
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diff changeset
389 }
1546866ebb8d First draft of Truffle graph caching.
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diff changeset
390
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twisti
parents: 10663
diff changeset
391 out.printf("%d assumptions:%n", nonNullList.size());
10611
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diff changeset
392 for (Assumption a : nonNullList) {
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diff changeset
393 out.println(a.toString());
1546866ebb8d First draft of Truffle graph caching.
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diff changeset
394 }
1546866ebb8d First draft of Truffle graph caching.
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diff changeset
395 }
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396 }