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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 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_TYPE_FEEDBACK_VECTOR_H_ | 5 #ifndef V8_TYPE_FEEDBACK_VECTOR_H_ |
6 #define V8_TYPE_FEEDBACK_VECTOR_H_ | 6 #define V8_TYPE_FEEDBACK_VECTOR_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "src/checks.h" | 10 #include "src/checks.h" |
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22 FeedbackVectorSpec() : slots_(0), has_ic_slot_(false) {} | 22 FeedbackVectorSpec() : slots_(0), has_ic_slot_(false) {} |
23 explicit FeedbackVectorSpec(int slots) : slots_(slots), has_ic_slot_(false) {} | 23 explicit FeedbackVectorSpec(int slots) : slots_(slots), has_ic_slot_(false) {} |
24 FeedbackVectorSpec(int slots, Code::Kind ic_slot_kind) | 24 FeedbackVectorSpec(int slots, Code::Kind ic_slot_kind) |
25 : slots_(slots), has_ic_slot_(true), ic_kind_(ic_slot_kind) {} | 25 : slots_(slots), has_ic_slot_(true), ic_kind_(ic_slot_kind) {} |
26 | 26 |
27 int slots() const { return slots_; } | 27 int slots() const { return slots_; } |
28 | 28 |
29 int ic_slots() const { return has_ic_slot_ ? 1 : 0; } | 29 int ic_slots() const { return has_ic_slot_ ? 1 : 0; } |
30 | 30 |
31 Code::Kind GetKind(int ic_slot) const { | 31 Code::Kind GetKind(int ic_slot) const { |
32 DCHECK(FLAG_vector_ics && has_ic_slot_ && ic_slot == 0); | 32 DCHECK(has_ic_slot_ && ic_slot == 0); |
33 return ic_kind_; | 33 return ic_kind_; |
34 } | 34 } |
35 | 35 |
36 private: | 36 private: |
37 int slots_; | 37 int slots_; |
38 bool has_ic_slot_; | 38 bool has_ic_slot_; |
39 Code::Kind ic_kind_; | 39 Code::Kind ic_kind_; |
40 }; | 40 }; |
41 | 41 |
42 | 42 |
43 class ZoneFeedbackVectorSpec { | 43 class ZoneFeedbackVectorSpec { |
44 public: | 44 public: |
45 explicit ZoneFeedbackVectorSpec(Zone* zone) | 45 explicit ZoneFeedbackVectorSpec(Zone* zone) |
46 : slots_(0), ic_slots_(0), ic_slot_kinds_(zone) {} | 46 : slots_(0), ic_slots_(0), ic_slot_kinds_(zone) {} |
47 | 47 |
48 ZoneFeedbackVectorSpec(Zone* zone, int slots, int ic_slots) | 48 ZoneFeedbackVectorSpec(Zone* zone, int slots, int ic_slots) |
49 : slots_(slots), | 49 : slots_(slots), ic_slots_(ic_slots), ic_slot_kinds_(ic_slots, zone) {} |
50 ic_slots_(ic_slots), | |
51 ic_slot_kinds_(FLAG_vector_ics ? ic_slots : 0, zone) {} | |
52 | 50 |
53 int slots() const { return slots_; } | 51 int slots() const { return slots_; } |
54 void increase_slots(int count) { slots_ += count; } | 52 void increase_slots(int count) { slots_ += count; } |
55 | 53 |
56 int ic_slots() const { return ic_slots_; } | 54 int ic_slots() const { return ic_slots_; } |
57 void increase_ic_slots(int count) { | 55 void increase_ic_slots(int count) { |
58 ic_slots_ += count; | 56 ic_slots_ += count; |
59 if (FLAG_vector_ics) ic_slot_kinds_.resize(ic_slots_); | 57 ic_slot_kinds_.resize(ic_slots_); |
60 } | 58 } |
61 | 59 |
62 void SetKind(int ic_slot, Code::Kind kind) { | 60 void SetKind(int ic_slot, Code::Kind kind) { |
63 DCHECK(FLAG_vector_ics); | |
64 ic_slot_kinds_[ic_slot] = kind; | 61 ic_slot_kinds_[ic_slot] = kind; |
65 } | 62 } |
66 | 63 |
67 Code::Kind GetKind(int ic_slot) const { | 64 Code::Kind GetKind(int ic_slot) const { |
68 DCHECK(FLAG_vector_ics); | |
69 return static_cast<Code::Kind>(ic_slot_kinds_.at(ic_slot)); | 65 return static_cast<Code::Kind>(ic_slot_kinds_.at(ic_slot)); |
70 } | 66 } |
71 | 67 |
72 private: | 68 private: |
73 int slots_; | 69 int slots_; |
74 int ic_slots_; | 70 int ic_slots_; |
75 ZoneVector<unsigned char> ic_slot_kinds_; | 71 ZoneVector<unsigned char> ic_slot_kinds_; |
76 }; | 72 }; |
77 | 73 |
78 | 74 |
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93 static TypeFeedbackVector* cast(Object* obj) { | 89 static TypeFeedbackVector* cast(Object* obj) { |
94 DCHECK(obj->IsTypeFeedbackVector()); | 90 DCHECK(obj->IsTypeFeedbackVector()); |
95 return reinterpret_cast<TypeFeedbackVector*>(obj); | 91 return reinterpret_cast<TypeFeedbackVector*>(obj); |
96 } | 92 } |
97 | 93 |
98 static const int kReservedIndexCount = 3; | 94 static const int kReservedIndexCount = 3; |
99 static const int kFirstICSlotIndex = 0; | 95 static const int kFirstICSlotIndex = 0; |
100 static const int kWithTypesIndex = 1; | 96 static const int kWithTypesIndex = 1; |
101 static const int kGenericCountIndex = 2; | 97 static const int kGenericCountIndex = 2; |
102 | 98 |
103 static int elements_per_ic_slot() { return FLAG_vector_ics ? 2 : 1; } | 99 static int elements_per_ic_slot() { return 2; } |
104 | 100 |
105 int first_ic_slot_index() const { | 101 int first_ic_slot_index() const { |
106 DCHECK(length() >= kReservedIndexCount); | 102 DCHECK(length() >= kReservedIndexCount); |
107 return Smi::cast(get(kFirstICSlotIndex))->value(); | 103 return Smi::cast(get(kFirstICSlotIndex))->value(); |
108 } | 104 } |
109 | 105 |
110 int ic_with_type_info_count() { | 106 int ic_with_type_info_count() { |
111 return length() > 0 ? Smi::cast(get(kWithTypesIndex))->value() : 0; | 107 return length() > 0 ? Smi::cast(get(kWithTypesIndex))->value() : 0; |
112 } | 108 } |
113 | 109 |
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418 void ConfigurePolymorphic(Handle<Name> name, MapHandleList* maps, | 414 void ConfigurePolymorphic(Handle<Name> name, MapHandleList* maps, |
419 CodeHandleList* handlers); | 415 CodeHandleList* handlers); |
420 | 416 |
421 InlineCacheState StateFromFeedback() const override; | 417 InlineCacheState StateFromFeedback() const override; |
422 Name* FindFirstName() const override; | 418 Name* FindFirstName() const override; |
423 }; | 419 }; |
424 } | 420 } |
425 } // namespace v8::internal | 421 } // namespace v8::internal |
426 | 422 |
427 #endif // V8_TRANSITIONS_H_ | 423 #endif // V8_TRANSITIONS_H_ |
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