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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. | 
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be | 
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. | 
| 4 | 4 | 
| 5 #ifndef V8_TRANSITIONS_H_ | 5 #ifndef V8_TRANSITIONS_H_ | 
| 6 #define V8_TRANSITIONS_H_ | 6 #define V8_TRANSITIONS_H_ | 
| 7 | 7 | 
| 8 #include "src/checks.h" | 8 #include "src/checks.h" | 
| 9 #include "src/elements-kind.h" | 9 #include "src/elements-kind.h" | 
| 10 #include "src/heap.h" | 10 #include "src/heap.h" | 
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| 133   static const int kPrototypeTransitionsOffset = kBackPointerStorageOffset + | 133   static const int kPrototypeTransitionsOffset = kBackPointerStorageOffset + | 
| 134                                                  kPointerSize; | 134                                                  kPointerSize; | 
| 135 | 135 | 
| 136   // Layout of map transition entries in full transition arrays. | 136   // Layout of map transition entries in full transition arrays. | 
| 137   static const int kTransitionKey = 0; | 137   static const int kTransitionKey = 0; | 
| 138   static const int kTransitionTarget = 1; | 138   static const int kTransitionTarget = 1; | 
| 139   static const int kTransitionSize = 2; | 139   static const int kTransitionSize = 2; | 
| 140 | 140 | 
| 141 #ifdef OBJECT_PRINT | 141 #ifdef OBJECT_PRINT | 
| 142   // Print all the transitions. | 142   // Print all the transitions. | 
| 143   inline void PrintTransitions() { | 143   void PrintTransitions(OStream& os);  // NOLINT | 
| 144     PrintTransitions(stdout); |  | 
| 145   } |  | 
| 146   void PrintTransitions(FILE* out); |  | 
| 147 #endif | 144 #endif | 
| 148 | 145 | 
| 149 #ifdef DEBUG | 146 #ifdef DEBUG | 
| 150   bool IsSortedNoDuplicates(int valid_entries = -1); | 147   bool IsSortedNoDuplicates(int valid_entries = -1); | 
| 151   bool IsConsistentWithBackPointers(Map* current_map); | 148   bool IsConsistentWithBackPointers(Map* current_map); | 
| 152   bool IsEqualTo(TransitionArray* other); | 149   bool IsEqualTo(TransitionArray* other); | 
| 153 #endif | 150 #endif | 
| 154 | 151 | 
| 155   // The maximum number of transitions we want in a transition array (should | 152   // The maximum number of transitions we want in a transition array (should | 
| 156   // fit in a page). | 153   // fit in a page). | 
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| 188                                                 int origin_transition, | 185                                                 int origin_transition, | 
| 189                                                 int target_transition); | 186                                                 int target_transition); | 
| 190 | 187 | 
| 191   DISALLOW_IMPLICIT_CONSTRUCTORS(TransitionArray); | 188   DISALLOW_IMPLICIT_CONSTRUCTORS(TransitionArray); | 
| 192 }; | 189 }; | 
| 193 | 190 | 
| 194 | 191 | 
| 195 } }  // namespace v8::internal | 192 } }  // namespace v8::internal | 
| 196 | 193 | 
| 197 #endif  // V8_TRANSITIONS_H_ | 194 #endif  // V8_TRANSITIONS_H_ | 
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