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Issue 16482004: Revert "Enable map dependency to in-flight compilation info." (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 6 months ago
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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 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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4973 static Code* GetCodeAgeStub(Age age, MarkingParity parity); 4973 static Code* GetCodeAgeStub(Age age, MarkingParity parity);
4974 4974
4975 // Code aging -- platform-specific 4975 // Code aging -- platform-specific
4976 static void PatchPlatformCodeAge(byte* sequence, Age age, 4976 static void PatchPlatformCodeAge(byte* sequence, Age age,
4977 MarkingParity parity); 4977 MarkingParity parity);
4978 4978
4979 DISALLOW_IMPLICIT_CONSTRUCTORS(Code); 4979 DISALLOW_IMPLICIT_CONSTRUCTORS(Code);
4980 }; 4980 };
4981 4981
4982 4982
4983 class CompilationInfo;
4984
4985 // This class describes the layout of dependent codes array of a map. The 4983 // This class describes the layout of dependent codes array of a map. The
4986 // array is partitioned into several groups of dependent codes. Each group 4984 // array is partitioned into several groups of dependent codes. Each group
4987 // contains codes with the same dependency on the map. The array has the 4985 // contains codes with the same dependency on the map. The array has the
4988 // following layout for n dependency groups: 4986 // following layout for n dependency groups:
4989 // 4987 //
4990 // +----+----+-----+----+---------+----------+-----+---------+-----------+ 4988 // +----+----+-----+----+---------+----------+-----+---------+-----------+
4991 // | C1 | C2 | ... | Cn | group 1 | group 2 | ... | group n | undefined | 4989 // | C1 | C2 | ... | Cn | group 1 | group 2 | ... | group n | undefined |
4992 // +----+----+-----+----+---------+----------+-----+---------+-----------+ 4990 // +----+----+-----+----+---------+----------+-----+---------+-----------+
4993 // 4991 //
4994 // The first n elements are Smis, each of them specifies the number of codes 4992 // The first n elements are Smis, each of them specifies the number of codes
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5022 }; 5020 };
5023 5021
5024 // Array for holding the index of the first code object of each group. 5022 // Array for holding the index of the first code object of each group.
5025 // The last element stores the total number of code objects. 5023 // The last element stores the total number of code objects.
5026 class GroupStartIndexes { 5024 class GroupStartIndexes {
5027 public: 5025 public:
5028 explicit GroupStartIndexes(DependentCode* entries); 5026 explicit GroupStartIndexes(DependentCode* entries);
5029 void Recompute(DependentCode* entries); 5027 void Recompute(DependentCode* entries);
5030 int at(int i) { return start_indexes_[i]; } 5028 int at(int i) { return start_indexes_[i]; }
5031 int number_of_entries() { return start_indexes_[kGroupCount]; } 5029 int number_of_entries() { return start_indexes_[kGroupCount]; }
5032 int number_of_code_entries() {
5033 return start_indexes_[kGroupCount];
5034 }
5035 private: 5030 private:
5036 int start_indexes_[kGroupCount + 1]; 5031 int start_indexes_[kGroupCount + 1];
5037 }; 5032 };
5038 5033
5039 bool Contains(DependencyGroup group, Code* code); 5034 bool Contains(DependencyGroup group, Code* code);
5040 static Handle<DependentCode> Insert(Handle<DependentCode> entries, 5035 static Handle<DependentCode> Insert(Handle<DependentCode> entries,
5041 DependencyGroup group, 5036 DependencyGroup group,
5042 Handle<Object> object); 5037 Handle<Code> value);
5043 void UpdateToFinishedCode(DependencyGroup group,
5044 CompilationInfo* info,
5045 Code* code);
5046 void RemoveCompilationInfo(DependentCode::DependencyGroup group,
5047 CompilationInfo* info);
5048
5049 void DeoptimizeDependentCodeGroup(Isolate* isolate, 5038 void DeoptimizeDependentCodeGroup(Isolate* isolate,
5050 DependentCode::DependencyGroup group); 5039 DependentCode::DependencyGroup group);
5051 5040
5052 // The following low-level accessors should only be used by this class 5041 // The following low-level accessors should only be used by this class
5053 // and the mark compact collector. 5042 // and the mark compact collector.
5054 inline int number_of_entries(DependencyGroup group); 5043 inline int number_of_entries(DependencyGroup group);
5055 inline void set_number_of_entries(DependencyGroup group, int value); 5044 inline void set_number_of_entries(DependencyGroup group, int value);
5056 inline bool is_code_at(int i);
5057 inline Code* code_at(int i); 5045 inline Code* code_at(int i);
5058 inline CompilationInfo* compilation_info_at(int i); 5046 inline void set_code_at(int i, Code* value);
5059 inline void set_object_at(int i, Object* object); 5047 inline Object** code_slot_at(int i);
5060 inline Object** slot_at(int i); 5048 inline void clear_code_at(int i);
5061 inline Object* object_at(int i);
5062 inline void clear_at(int i);
5063 inline void copy(int from, int to);
5064 static inline DependentCode* cast(Object* object); 5049 static inline DependentCode* cast(Object* object);
5065 5050
5066 private: 5051 private:
5067 // Make a room at the end of the given group by moving out the first 5052 // Make a room at the end of the given group by moving out the first
5068 // code objects of the subsequent groups. 5053 // code objects of the subsequent groups.
5069 inline void ExtendGroup(DependencyGroup group); 5054 inline void ExtendGroup(DependencyGroup group);
5070 static const int kCodesStartIndex = kGroupCount; 5055 static const int kCodesStartIndex = kGroupCount;
5071 }; 5056 };
5072 5057
5073 5058
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5562 return instance_type() >= FIRST_JS_OBJECT_TYPE; 5547 return instance_type() >= FIRST_JS_OBJECT_TYPE;
5563 } 5548 }
5564 5549
5565 // Fires when the layout of an object with a leaf map changes. 5550 // Fires when the layout of an object with a leaf map changes.
5566 // This includes adding transitions to the leaf map or changing 5551 // This includes adding transitions to the leaf map or changing
5567 // the descriptor array. 5552 // the descriptor array.
5568 inline void NotifyLeafMapLayoutChange(); 5553 inline void NotifyLeafMapLayoutChange();
5569 5554
5570 inline bool CanOmitPrototypeChecks(); 5555 inline bool CanOmitPrototypeChecks();
5571 5556
5572 void AddDependentCompilationInfo(DependentCode::DependencyGroup group, 5557 inline void AddDependentCode(DependentCode::DependencyGroup group,
5573 CompilationInfo* info); 5558 Handle<Code> code);
5574
5575 void AddDependentCode(DependentCode::DependencyGroup group,
5576 Handle<Code> code);
5577 5559
5578 bool IsMapInArrayPrototypeChain(); 5560 bool IsMapInArrayPrototypeChain();
5579 5561
5580 // Dispatched behavior. 5562 // Dispatched behavior.
5581 DECLARE_PRINTER(Map) 5563 DECLARE_PRINTER(Map)
5582 DECLARE_VERIFIER(Map) 5564 DECLARE_VERIFIER(Map)
5583 5565
5584 #ifdef VERIFY_HEAP 5566 #ifdef VERIFY_HEAP
5585 void SharedMapVerify(); 5567 void SharedMapVerify();
5586 void VerifyOmittedPrototypeChecks(); 5568 void VerifyOmittedPrototypeChecks();
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9681 } else { 9663 } else {
9682 value &= ~(1 << bit_position); 9664 value &= ~(1 << bit_position);
9683 } 9665 }
9684 return value; 9666 return value;
9685 } 9667 }
9686 }; 9668 };
9687 9669
9688 } } // namespace v8::internal 9670 } } // namespace v8::internal
9689 9671
9690 #endif // V8_OBJECTS_H_ 9672 #endif // V8_OBJECTS_H_
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