Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/DSLShare.java @ 17105:0a21f24f9a65
[SPARC] eliminating some redundant LIR types
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Fri, 12 Sep 2014 14:50:02 -0700 |
parents | 0ea0c4133b78 |
children | 1680a4ddc2a7 |
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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.dsl.internal; |
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26 |
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27 import java.util.*; |
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28 |
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29 import com.oracle.truffle.api.nodes.*; |
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30 |
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31 /** Contains utility classes shared across generated DSLNode implementations. */ |
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32 public class DSLShare { |
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33 |
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34 public static boolean isExcluded(Node currentNode, DSLMetadata otherMetadata) { |
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35 assert otherMetadata.getExcludedBy().length > 0 : "At least one exclude must be defined for isIncluded."; |
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36 Node cur = findRoot(currentNode); |
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37 while (cur != null) { |
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38 Class<?> curClass = cur.getClass(); |
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39 if (curClass == otherMetadata.getSpecializationClass()) { |
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40 return true; |
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41 } else if (containsClass(otherMetadata.getExcludedBy(), cur)) { |
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42 return true; |
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43 } |
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44 cur = getNext(cur); |
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45 } |
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46 return false; |
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47 } |
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48 |
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49 private static boolean includes(Node oldNode, DSLNode newNode) { |
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50 return containsClass(newNode.getMetadata0().getIncludes(), oldNode); |
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51 } |
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52 |
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53 public static <T extends Node & DSLNode> T rewrite(Node thisNode, T newNode, String message) { |
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54 assert newNode != null; |
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55 if (getNext(thisNode) != null || getPrevious(thisNode) != null) { |
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56 // already polymorphic -> append |
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57 return appendPolymorphic(findUninitialized(thisNode), newNode); |
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58 } else if (includes(thisNode, newNode)) { |
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59 // included -> remains monomorphic |
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60 newNode.adoptChildren0(thisNode, null); |
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61 return thisNode.replace(newNode, message); |
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62 } else { |
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63 // goto polymorphic |
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64 return null; |
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65 } |
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66 } |
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67 |
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68 @SuppressWarnings("unchecked") |
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69 public static <T extends Node> T findRoot(T node) { |
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70 Node prev = node; |
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71 Node cur; |
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72 do { |
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73 cur = prev; |
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74 prev = getPrevious(cur); |
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75 } while (prev != null); |
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76 return (T) cur; |
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77 } |
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78 |
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79 private static Node findUninitialized(Node node) { |
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80 Node next = node; |
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81 Node cur; |
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82 do { |
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83 cur = next; |
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84 next = getNext(cur); |
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85 } while (next != null); |
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86 return cur; |
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87 } |
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88 |
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89 public static <T extends Node & DSLNode> T rewriteUninitialized(Node uninitialized, T newNode) { |
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90 Node prev = getPrevious(uninitialized); |
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91 if (prev == null) { |
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92 newNode.adoptChildren0(uninitialized, null); |
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93 return uninitialized.replace(newNode, "Uninitialized monomorphic"); |
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94 } else { |
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95 return appendPolymorphic(uninitialized, newNode); |
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96 } |
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97 } |
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98 |
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99 public static <T extends Node & DSLNode> T rewriteToPolymorphic(Node oldNode, DSLNode uninitializedDSL, T polymorphic, DSLNode currentCopy, DSLNode newNodeDSL, String message) { |
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100 assert getNext(oldNode) == null; |
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101 assert getPrevious(oldNode) == null; |
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102 assert newNodeDSL != null; |
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103 |
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104 Node uninitialized = (Node) uninitializedDSL; |
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105 Node newNode = (Node) newNodeDSL; |
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106 polymorphic.adoptChildren0(oldNode, (Node) currentCopy); |
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107 |
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108 updateSourceSection(oldNode, uninitialized); |
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109 // new specialization |
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110 updateSourceSection(oldNode, newNode); |
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111 newNodeDSL.adoptChildren0(null, uninitialized); |
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112 currentCopy.adoptChildren0(null, newNode); |
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113 |
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114 oldNode.replace(polymorphic, message); |
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115 |
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116 assert polymorphic.getNext0() == currentCopy; |
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117 assert newNode != null ? currentCopy.getNext0() == newNode : currentCopy.getNext0() == uninitialized; |
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118 assert uninitializedDSL.getNext0() == null; |
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119 return polymorphic; |
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120 } |
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121 |
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122 private static void updateSourceSection(Node oldNode, Node newNode) { |
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123 if (newNode.getSourceSection() == null) { |
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124 newNode.assignSourceSection(oldNode.getSourceSection()); |
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125 } |
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126 } |
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127 |
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128 private static Class<?>[] mergeTypes(DSLNode node, Class<?>[] types) { |
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129 Class<?>[] specializedTypes = node.getMetadata0().getSpecializedTypes(); |
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130 if (specializedTypes.length == 0) { |
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131 return null; |
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132 } else if (types == null) { |
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133 return Arrays.copyOf(specializedTypes, specializedTypes.length); |
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134 } else { |
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135 for (int i = 0; i < specializedTypes.length; i++) { |
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136 if (specializedTypes[i] != types[i]) { |
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137 types[i] = Object.class; |
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138 } |
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139 } |
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140 return types; |
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141 } |
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142 } |
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143 |
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144 private static <T extends Node & DSLNode> T appendPolymorphic(Node uninitialized, T newNode) { |
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145 Class<?>[] includes = newNode.getMetadata0().getIncludes(); |
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146 Node cur = getPrevious(uninitialized); |
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147 Node prev = uninitialized; |
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148 int depth = 0; |
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149 Class<?>[] types = null; |
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150 while (cur != null) { |
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151 if (containsClass(includes, cur)) { |
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152 cur.replace(prev, "Included in other specialization"); |
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153 cur = prev; |
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154 } else { |
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155 depth++; |
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156 types = mergeTypes((DSLNode) cur, types); |
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157 } |
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158 prev = cur; |
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159 cur = getPrevious(cur); |
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160 } |
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161 assert prev.getCost() == NodeCost.POLYMORPHIC; |
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162 |
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163 updateSourceSection(prev, newNode); |
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164 if (depth <= 1) { |
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165 newNode.adoptChildren0(prev, null); |
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166 return prev.replace(newNode, "Polymorphic to monomorphic."); |
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167 } else { |
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168 newNode.adoptChildren0(null, uninitialized); |
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169 ((DSLNode) prev).updateTypes0(mergeTypes(newNode, types)); |
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170 return uninitialized.replace(newNode, "Appended polymorphic"); |
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171 } |
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172 } |
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173 |
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174 private static boolean containsClass(Class<?>[] classList, Node node) { |
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175 Class<?> nodeClass = node.getClass(); |
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176 for (Class<?> toCheck : classList) { |
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177 if (nodeClass == toCheck) { |
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178 if (node.getCost() == NodeCost.UNINITIALIZED) { |
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179 /* |
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180 * In case a specialization is excluded by the fallback specialization the |
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181 * uninitialized class is used as exclusion class. Because the fallback field in |
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182 * the uninitialized specialization is not accessible we use the costs to check |
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183 * if the fallback was reached or not. In case the fallback was reached in the |
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184 * uninitialized version the cost is MONOMORPHIC, otherwise it is UNINITIALIZED. |
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185 */ |
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186 continue; |
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187 } |
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188 return true; |
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189 } |
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190 } |
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191 return false; |
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192 } |
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193 |
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194 private static Node getNext(Node node) { |
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195 return ((DSLNode) node).getNext0(); |
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196 } |
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197 |
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198 private static Node getPrevious(Node node) { |
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199 Node parent = node.getParent(); |
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200 if (parent instanceof DSLNode && getNext(parent) == node) { |
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201 return parent; |
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202 } else { |
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203 return null; |
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204 } |
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205 } |
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206 |
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207 } |