Mercurial > hg > truffle
annotate graal/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/DSLShare.java @ 16763:e6d15134ca86
Truffle-DSL: fixed formatting problems.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 11 Aug 2014 16:21:54 +0200 |
parents | 4f589fa69b9c |
children | 90984ae0eaa8 |
rev | line source |
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16763
e6d15134ca86
Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents:
16751
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changeset
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1 package com.oracle.truffle.api.dsl.internal; |
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2 |
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3 import java.util.*; |
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4 |
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5 import com.oracle.truffle.api.nodes.*; |
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6 |
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7 /** Contains utility classes shared across generated DSLNode implementations. */ |
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8 public class DSLShare { |
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9 |
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10 public static boolean isExcluded(Node currentNode, DSLMetadata otherMetadata) { |
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11 assert otherMetadata.getExcludedBy().length > 0 : "At least one exclude must be defined for isIncluded."; |
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12 Node cur = findRoot(currentNode); |
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13 while (cur != null) { |
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14 Class<?> curClass = cur.getClass(); |
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15 if (curClass == otherMetadata.getSpecializationClass()) { |
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16 return true; |
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17 } else if (containsClass(otherMetadata.getExcludedBy(), cur)) { |
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18 return true; |
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19 } |
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20 cur = getNext(cur); |
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21 } |
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22 return false; |
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23 } |
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24 |
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25 private static boolean includes(Node oldNode, DSLNode newNode) { |
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26 return containsClass(newNode.getMetadata0().getIncludes(), oldNode); |
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27 } |
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28 |
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29 public static <T extends Node & DSLNode> T rewrite(Node thisNode, T newNode, String message) { |
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30 assert newNode != null; |
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31 if (getNext(thisNode) != null || getPrevious(thisNode) != null) { |
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32 // already polymorphic -> append |
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33 return appendPolymorphic(findUninitialized(thisNode), newNode); |
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34 } else if (includes(thisNode, newNode)) { |
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35 // included -> remains monomorphic |
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36 newNode.adoptChildren0(thisNode, null); |
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37 return thisNode.replace(newNode, message); |
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38 } else { |
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39 // goto polymorphic |
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40 return null; |
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41 } |
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42 } |
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43 |
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44 @SuppressWarnings("unchecked") |
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45 public static <T extends Node> T findRoot(T node) { |
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46 Node prev = node; |
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47 Node cur; |
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48 do { |
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49 cur = prev; |
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50 prev = getPrevious(cur); |
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51 } while (prev != null); |
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52 return (T) cur; |
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53 } |
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54 |
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55 private static Node findUninitialized(Node node) { |
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56 Node next = node; |
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57 Node cur; |
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58 do { |
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59 cur = next; |
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60 next = getNext(cur); |
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61 } while (next != null); |
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62 return cur; |
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63 } |
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64 |
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65 public static <T extends Node & DSLNode> T rewriteUninitialized(Node uninitialized, T newNode) { |
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66 Node prev = getPrevious(uninitialized); |
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67 if (prev == null) { |
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68 newNode.adoptChildren0(uninitialized, null); |
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69 return uninitialized.replace(newNode, "Uninitialized monomorphic"); |
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70 } else { |
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71 return appendPolymorphic(uninitialized, newNode); |
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72 } |
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73 } |
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74 |
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75 public static <T extends Node & DSLNode> T rewriteToPolymorphic(Node oldNode, DSLNode uninitialized, T polymorphic, DSLNode currentCopy, DSLNode newNode, String message) { |
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76 assert getNext(oldNode) == null; |
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77 assert getPrevious(oldNode) == null; |
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78 |
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79 polymorphic.adoptChildren0(oldNode, (Node) currentCopy); |
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80 |
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81 if (newNode == null) { |
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82 // fallback |
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83 currentCopy.adoptChildren0(null, (Node) uninitialized); |
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84 } else { |
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85 // new specialization |
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86 newNode.adoptChildren0(null, (Node) uninitialized); |
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87 currentCopy.adoptChildren0(null, (Node) newNode); |
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88 } |
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89 |
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90 oldNode.replace(polymorphic, message); |
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91 |
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92 assert polymorphic.getNext0() == currentCopy; |
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93 assert newNode != null ? currentCopy.getNext0() == newNode : currentCopy.getNext0() == uninitialized; |
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94 assert uninitialized.getNext0() == null; |
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95 return polymorphic; |
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96 } |
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97 |
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98 private static Class<?>[] mergeTypes(DSLNode node, Class<?>[] types) { |
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99 Class<?>[] specializedTypes = node.getMetadata0().getSpecializedTypes(); |
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100 if (specializedTypes.length == 0) { |
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101 return null; |
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102 } else if (types == null) { |
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103 return Arrays.copyOf(specializedTypes, specializedTypes.length); |
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104 } else { |
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105 for (int i = 0; i < specializedTypes.length; i++) { |
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106 if (specializedTypes[i] != types[i]) { |
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107 types[i] = Object.class; |
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108 } |
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109 } |
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110 return types; |
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111 } |
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112 } |
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113 |
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114 private static <T extends Node & DSLNode> T appendPolymorphic(Node uninitialized, T newNode) { |
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115 Class<?>[] includes = newNode.getMetadata0().getIncludes(); |
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116 Node cur = getPrevious(uninitialized); |
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117 Node prev = uninitialized; |
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118 int depth = 0; |
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119 Class<?>[] types = null; |
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120 while (cur != null) { |
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121 if (containsClass(includes, cur)) { |
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122 cur.replace(prev, "Included in other specialization"); |
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123 cur = prev; |
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124 } else { |
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125 depth++; |
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126 types = mergeTypes((DSLNode) cur, types); |
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127 } |
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128 prev = cur; |
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129 cur = getPrevious(cur); |
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130 } |
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131 assert prev.getCost() == NodeCost.POLYMORPHIC; |
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132 |
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133 if (depth == 0) { |
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134 newNode.adoptChildren0(prev, null); |
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135 return prev.replace(newNode, "Polymorphic to monomorphic."); |
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136 } else { |
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137 newNode.adoptChildren0(null, uninitialized); |
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138 ((DSLNode) prev).updateTypes0(mergeTypes(newNode, types)); |
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139 return uninitialized.replace(newNode, "Appended polymorphic"); |
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140 } |
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141 } |
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142 |
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143 private static boolean containsClass(Class<?>[] classList, Node node) { |
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144 Class<?> nodeClass = node.getClass(); |
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145 for (Class<?> toCheck : classList) { |
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146 if (nodeClass == toCheck) { |
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147 if (node.getCost() == NodeCost.UNINITIALIZED) { |
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148 /* |
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149 * In case a specialization is excluded by the fallback specialization the |
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150 * uninitialized class is used as exclusion class. Because the fallback field in |
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151 * the uninitialized specialization is not accessible we use the costs to check |
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152 * if the fallback was reached or not. In case the fallback was reached in the |
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153 * uninitialized version the cost is MONOMORPHIC, otherwise it is UNINITIALIZED. |
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154 */ |
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155 continue; |
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156 } |
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157 return true; |
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158 } |
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159 } |
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160 return false; |
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161 } |
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162 |
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163 private static Node getNext(Node node) { |
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164 return ((DSLNode) node).getNext0(); |
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165 } |
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166 |
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167 private static Node getPrevious(Node node) { |
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168 Node parent = node.getParent(); |
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169 if (parent instanceof DSLNode && getNext(parent) == node) { |
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170 return parent; |
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171 } else { |
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172 return null; |
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173 } |
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174 } |
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175 |
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176 } |