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annotate truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/SpecializationData.java @ 22548:6b76a24fffbd default tip

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author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 14 Jan 2016 14:20:57 +0100
parents dbbcd8eb5dae
children
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rev   line source
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1 /*
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2 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.dsl.processor.model;
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24
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25 import com.oracle.truffle.dsl.processor.ProcessorContext;
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26 import com.oracle.truffle.dsl.processor.expression.DSLExpression;
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27 import com.oracle.truffle.dsl.processor.java.ElementUtils;
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28 import java.util.ArrayList;
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29 import java.util.Collections;
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30 import java.util.Iterator;
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31 import java.util.List;
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32 import java.util.Set;
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33 import java.util.TreeSet;
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34 import javax.lang.model.element.VariableElement;
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35 import javax.lang.model.type.TypeMirror;
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36
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37 public final class SpecializationData extends TemplateMethod {
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38
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39 public enum SpecializationKind {
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40 UNINITIALIZED,
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41 SPECIALIZED,
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42 POLYMORPHIC,
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43 FALLBACK
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44 }
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45
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46 private final NodeData node;
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47 private SpecializationKind kind;
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48 private final List<SpecializationThrowsData> exceptions;
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49 private List<GuardExpression> guards = Collections.emptyList();
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50 private List<CacheExpression> caches = Collections.emptyList();
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51 private List<AssumptionExpression> assumptionExpressions = Collections.emptyList();
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52 private List<ShortCircuitData> shortCircuits;
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53 private final Set<SpecializationData> contains = new TreeSet<>();
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54 private final Set<String> containsNames = new TreeSet<>();
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55 private final Set<SpecializationData> excludedBy = new TreeSet<>();
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56 private String insertBeforeName;
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57 private SpecializationData insertBefore;
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58 private boolean reachable;
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59 private int index;
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60 private DSLExpression limitExpression;
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61
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62 public SpecializationData(NodeData node, TemplateMethod template, SpecializationKind kind, List<SpecializationThrowsData> exceptions) {
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63 super(template);
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64 this.node = node;
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65 this.kind = kind;
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66 this.exceptions = exceptions;
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67 this.index = template.getNaturalOrder();
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69 for (SpecializationThrowsData exception : exceptions) {
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70 exception.setSpecialization(this);
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71 }
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72 }
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73
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74 public boolean isCacheBoundByGuard(CacheExpression cacheExpression) {
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75 VariableElement cachedVariable = cacheExpression.getParameter().getVariableElement();
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76
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77 for (GuardExpression expression : getGuards()) {
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78 if (expression.getExpression().findBoundVariableElements().contains(cachedVariable)) {
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79 return true;
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80 }
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81 }
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82
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83 // check all next binding caches if they are bound to a guard and use this cache variable
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84 boolean found = false;
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85 for (CacheExpression expression : getCaches()) {
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86 if (cacheExpression == expression) {
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87 found = true;
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88 } else if (found) {
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89 if (expression.getExpression().findBoundVariableElements().contains(cachedVariable)) {
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90 if (isCacheBoundByGuard(expression)) {
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91 return true;
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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 return false;
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97 }
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98
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99 public void setKind(SpecializationKind kind) {
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100 this.kind = kind;
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101 }
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102
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103 public boolean isDynamicParameterBound(DSLExpression expression) {
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104 Set<VariableElement> boundVariables = expression.findBoundVariableElements();
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105 for (Parameter parameter : getDynamicParameters()) {
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106 if (boundVariables.contains(parameter.getVariableElement())) {
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107 return true;
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108 }
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109 }
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110 return false;
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111 }
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112
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113 public Parameter findByVariable(VariableElement variable) {
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114 for (Parameter parameter : getParameters()) {
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115 if (ElementUtils.variableEquals(parameter.getVariableElement(), variable)) {
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116 return parameter;
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117 }
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118 }
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119 return null;
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120 }
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121
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122 public DSLExpression getLimitExpression() {
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123 return limitExpression;
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124 }
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125
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126 public void setLimitExpression(DSLExpression limitExpression) {
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127 this.limitExpression = limitExpression;
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128 }
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129
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130 public void setInsertBefore(SpecializationData insertBefore) {
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131 this.insertBefore = insertBefore;
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132 }
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133
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134 public void setInsertBeforeName(String insertBeforeName) {
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135 this.insertBeforeName = insertBeforeName;
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136 }
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137
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138 public SpecializationData getInsertBefore() {
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139 return insertBefore;
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140 }
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141
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142 public String getInsertBeforeName() {
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143 return insertBeforeName;
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144 }
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145
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146 public Set<String> getContainsNames() {
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147 return containsNames;
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148 }
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149
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150 public SpecializationData(NodeData node, TemplateMethod template, SpecializationKind kind) {
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151 this(node, template, kind, new ArrayList<SpecializationThrowsData>());
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152 }
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153
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154 public Set<SpecializationData> getContains() {
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155 return contains;
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156 }
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157
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158 public Set<SpecializationData> getExcludedBy() {
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159 return excludedBy;
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160 }
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161
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162 public void setReachable(boolean reachable) {
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163 this.reachable = reachable;
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164 }
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165
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166 public boolean isReachable() {
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167 return reachable;
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168 }
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169
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170 public boolean isPolymorphic() {
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171 return kind == SpecializationKind.POLYMORPHIC;
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172 }
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173
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174 @Override
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175 protected List<MessageContainer> findChildContainers() {
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176 List<MessageContainer> sinks = new ArrayList<>();
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177 if (exceptions != null) {
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178 sinks.addAll(exceptions);
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179 }
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180 if (guards != null) {
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181 sinks.addAll(guards);
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182 }
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183 if (caches != null) {
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184 sinks.addAll(caches);
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185 }
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186 if (assumptionExpressions != null) {
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187 sinks.addAll(assumptionExpressions);
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188 }
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189 return sinks;
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190 }
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191
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192 public boolean hasRewrite(ProcessorContext context) {
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193 if (!getExceptions().isEmpty()) {
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194 return true;
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195 }
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196 if (!getGuards().isEmpty()) {
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197 return true;
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198 }
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199 if (!getAssumptionExpressions().isEmpty()) {
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200 return true;
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201 }
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202
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203 for (Parameter parameter : getSignatureParameters()) {
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204 NodeChildData child = parameter.getSpecification().getExecution().getChild();
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205 if (child != null) {
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206 ExecutableTypeData type = child.findExecutableType(parameter.getType());
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207 if (type == null) {
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208 type = child.findAnyGenericExecutableType(context);
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209 }
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210 if (type.hasUnexpectedValue(context)) {
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211 return true;
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212 }
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213 if (ElementUtils.needsCastTo(type.getReturnType(), parameter.getType())) {
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214 return true;
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215 }
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216 }
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217 }
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218 return false;
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219 }
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220
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221 @Override
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222 public int compareTo(TemplateMethod other) {
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223 if (this == other) {
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224 return 0;
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225 } else if (!(other instanceof SpecializationData)) {
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diff changeset
226 return super.compareTo(other);
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227 }
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228 SpecializationData m2 = (SpecializationData) other;
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229 int kindOrder = kind.compareTo(m2.kind);
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diff changeset
230 if (kindOrder != 0) {
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231 return kindOrder;
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232 }
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233
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234 int compare = 0;
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235 int order1 = index;
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236 int order2 = m2.index;
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diff changeset
237 if (order1 != NO_NATURAL_ORDER && order2 != NO_NATURAL_ORDER) {
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238 compare = Integer.compare(order1, order2);
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diff changeset
239 if (compare != 0) {
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240 return compare;
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241 }
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242 }
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243
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244 return super.compareTo(other);
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245 }
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246
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247 public void setIndex(int order) {
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248 this.index = order;
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249 }
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250
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251 public int getIndex() {
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252 return index;
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253 }
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254
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255 public NodeData getNode() {
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256 return node;
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257 }
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258
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259 public void setGuards(List<GuardExpression> guards) {
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260 this.guards = guards;
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261 }
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262
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263 public boolean isSpecialized() {
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264 return kind == SpecializationKind.SPECIALIZED;
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265 }
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266
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267 public boolean isFallback() {
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268 return kind == SpecializationKind.FALLBACK;
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269 }
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270
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271 public boolean isUninitialized() {
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272 return kind == SpecializationKind.UNINITIALIZED;
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273 }
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274
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275 public List<SpecializationThrowsData> getExceptions() {
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276 return exceptions;
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277 }
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278
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279 public List<GuardExpression> getGuards() {
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280 return guards;
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281 }
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282
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283 public void setShortCircuits(List<ShortCircuitData> shortCircuits) {
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284 this.shortCircuits = shortCircuits;
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285 }
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286
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287 public List<ShortCircuitData> getShortCircuits() {
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288 return shortCircuits;
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289 }
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290
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291 public SpecializationData findNextSpecialization() {
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292 List<SpecializationData> specializations = node.getSpecializations();
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293 for (int i = 0; i < specializations.size() - 1; i++) {
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294 if (specializations.get(i) == this) {
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295 return specializations.get(i + 1);
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296 }
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297 }
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298 return null;
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299 }
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300
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301 @Override
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302 public String toString() {
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303 return String.format("%s [id = %s, method = %s, guards = %s, signature = %s]", getClass().getSimpleName(), getId(), getMethod(), getGuards(), getDynamicTypes());
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304 }
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305
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306 public boolean isFrameUsed() {
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307 return getFrame() != null;
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308 }
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309
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310 public List<CacheExpression> getCaches() {
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311 return caches;
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312 }
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313
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314 public void setCaches(List<CacheExpression> caches) {
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315 this.caches = caches;
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316 }
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317
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318 public void setAssumptionExpressions(List<AssumptionExpression> assumptionExpressions) {
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319 this.assumptionExpressions = assumptionExpressions;
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320 }
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321
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322 public List<AssumptionExpression> getAssumptionExpressions() {
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323 return assumptionExpressions;
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980db6c0bcd3 Truffle-DSL: fixed invalid @SlowPath on generic execute methods. (GRAAL-490 #resolve)
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diff changeset
324 }
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325
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326 public boolean hasMultipleInstances() {
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327 if (!getCaches().isEmpty()) {
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328 for (GuardExpression guard : getGuards()) {
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329 DSLExpression guardExpression = guard.getExpression();
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330 Set<VariableElement> boundVariables = guardExpression.findBoundVariableElements();
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331 if (isDynamicParameterBound(guardExpression)) {
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332 for (CacheExpression cache : getCaches()) {
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333 if (boundVariables.contains(cache.getParameter().getVariableElement())) {
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334 return true;
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335 }
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336 }
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337 }
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338 }
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339 }
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340 return false;
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341 }
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342
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343 public boolean isReachableAfter(SpecializationData prev) {
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344 if (!prev.isSpecialized()) {
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345 return true;
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346 }
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347
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348 if (!prev.getExceptions().isEmpty()) {
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diff changeset
349 // may get excluded by exception
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350 return true;
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351 }
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352
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353 if (hasMultipleInstances()) {
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354 // may fallthrough due to limit
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355 return true;
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356 }
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357
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diff changeset
358 Iterator<Parameter> currentSignature = getSignatureParameters().iterator();
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diff changeset
359 Iterator<Parameter> prevSignature = prev.getSignatureParameters().iterator();
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diff changeset
360
20938
18c0f02fa4d2 Truffle-DSL: make type systems optional.
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diff changeset
361 TypeSystemData typeSystem = prev.getNode().getTypeSystem();
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diff changeset
362 while (currentSignature.hasNext() && prevSignature.hasNext()) {
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diff changeset
363 TypeMirror currentType = currentSignature.next().getType();
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diff changeset
364 TypeMirror prevType = prevSignature.next().getType();
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365
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366 if (!typeSystem.isImplicitSubtypeOf(currentType, prevType)) {
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367 return true;
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368 }
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369 }
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370
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371 if (!prev.getAssumptionExpressions().isEmpty()) {
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372 // TODO: chumer: we could at least check reachability after trivial assumptions
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373 // not sure if this is worth it.
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374 return true;
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375 }
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376
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377 Iterator<GuardExpression> prevGuards = prev.getGuards().iterator();
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378 Iterator<GuardExpression> currentGuards = getGuards().iterator();
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379 while (prevGuards.hasNext()) {
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380 GuardExpression prevGuard = prevGuards.next();
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381 GuardExpression currentGuard = currentGuards.hasNext() ? currentGuards.next() : null;
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382 if (currentGuard == null || !currentGuard.implies(prevGuard)) {
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383 return true;
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384 }
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385 }
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parents: 14908
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386
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387 return false;
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388 }
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389
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390 public CacheExpression findCache(Parameter resolvedParameter) {
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391 for (CacheExpression cache : getCaches()) {
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392 if (cache.getParameter() == resolvedParameter) {
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393 return cache;
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parents: 19283
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394 }
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395 }
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396 return null;
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parents: 19283
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397 }
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parents: 19283
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398
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79041ab43660 Truffle-DSL: API-change: Renamed truffle.api.codegen to truffle.api.dsl for all projects and packages.
Christian Humer <christian.humer@gmail.com>
parents:
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399 }