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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 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #include "src/ic/ic.h" | 7 #include "src/ic/ic.h" |
8 #include "src/ic/ic-state.h" | 8 #include "src/ic/ic-state.h" |
9 #include "src/objects.h" | 9 #include "src/objects.h" |
10 #include "src/type-feedback-vector-inl.h" | 10 #include "src/type-feedback-vector-inl.h" |
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91 | 91 |
92 Handle<FixedArray> array = isolate->factory()->NewFixedArray(length, TENURED); | 92 Handle<FixedArray> array = isolate->factory()->NewFixedArray(length, TENURED); |
93 if (ic_slot_count > 0) { | 93 if (ic_slot_count > 0) { |
94 array->set(kFirstICSlotIndex, | 94 array->set(kFirstICSlotIndex, |
95 Smi::FromInt(slot_count + index_count + kReservedIndexCount)); | 95 Smi::FromInt(slot_count + index_count + kReservedIndexCount)); |
96 } else { | 96 } else { |
97 array->set(kFirstICSlotIndex, Smi::FromInt(length)); | 97 array->set(kFirstICSlotIndex, Smi::FromInt(length)); |
98 } | 98 } |
99 array->set(kWithTypesIndex, Smi::FromInt(0)); | 99 array->set(kWithTypesIndex, Smi::FromInt(0)); |
100 array->set(kGenericCountIndex, Smi::FromInt(0)); | 100 array->set(kGenericCountIndex, Smi::FromInt(0)); |
| 101 // Fill the indexes with zeros. |
| 102 for (int i = 0; i < index_count; i++) { |
| 103 array->set(kReservedIndexCount + i, Smi::FromInt(0)); |
| 104 } |
101 | 105 |
102 // Ensure we can skip the write barrier | 106 // Ensure we can skip the write barrier |
103 Handle<Object> uninitialized_sentinel = UninitializedSentinel(isolate); | 107 Handle<Object> uninitialized_sentinel = UninitializedSentinel(isolate); |
104 DCHECK_EQ(isolate->heap()->uninitialized_symbol(), *uninitialized_sentinel); | 108 DCHECK_EQ(isolate->heap()->uninitialized_symbol(), *uninitialized_sentinel); |
105 for (int i = kReservedIndexCount + index_count; i < length; i++) { | 109 for (int i = kReservedIndexCount + index_count; i < length; i++) { |
106 array->set(i, *uninitialized_sentinel, SKIP_WRITE_BARRIER); | 110 array->set(i, *uninitialized_sentinel, SKIP_WRITE_BARRIER); |
107 } | 111 } |
108 | 112 |
109 Handle<TypeFeedbackVector> vector = Handle<TypeFeedbackVector>::cast(array); | 113 Handle<TypeFeedbackVector> vector = Handle<TypeFeedbackVector>::cast(array); |
110 if (FLAG_vector_ics) { | 114 if (FLAG_vector_ics) { |
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127 | 131 |
128 | 132 |
129 // This logic is copied from | 133 // This logic is copied from |
130 // StaticMarkingVisitor<StaticVisitor>::VisitCodeTarget. | 134 // StaticMarkingVisitor<StaticVisitor>::VisitCodeTarget. |
131 // TODO(mvstanton): with weak handling of all vector ics, this logic should | 135 // TODO(mvstanton): with weak handling of all vector ics, this logic should |
132 // actually be completely eliminated and we no longer need to clear the | 136 // actually be completely eliminated and we no longer need to clear the |
133 // vector ICs. | 137 // vector ICs. |
134 static bool ClearLogic(Heap* heap, int ic_age, Code::Kind kind, | 138 static bool ClearLogic(Heap* heap, int ic_age, Code::Kind kind, |
135 InlineCacheState state) { | 139 InlineCacheState state) { |
136 if (FLAG_cleanup_code_caches_at_gc && | 140 if (FLAG_cleanup_code_caches_at_gc && |
137 (kind == Code::CALL_IC || state == MEGAMORPHIC || state == GENERIC || | 141 (kind == Code::CALL_IC || heap->flush_monomorphic_ics() || |
138 state == POLYMORPHIC || heap->flush_monomorphic_ics() || | |
139 // TODO(mvstanton): is this ic_age granular enough? it comes from | 142 // TODO(mvstanton): is this ic_age granular enough? it comes from |
140 // the SharedFunctionInfo which may change on a different schedule | 143 // the SharedFunctionInfo which may change on a different schedule |
141 // than ic targets. | 144 // than ic targets. |
142 // ic_age != heap->global_ic_age() || | 145 // ic_age != heap->global_ic_age() || |
143 // is_invalidated_weak_stub || | 146 // is_invalidated_weak_stub || |
144 heap->isolate()->serializer_enabled())) { | 147 heap->isolate()->serializer_enabled())) { |
145 return true; | 148 return true; |
146 } | 149 } |
147 return false; | 150 return false; |
148 } | 151 } |
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251 } | 254 } |
252 | 255 |
253 | 256 |
254 InlineCacheState KeyedLoadICNexus::StateFromFeedback() const { | 257 InlineCacheState KeyedLoadICNexus::StateFromFeedback() const { |
255 Isolate* isolate = GetIsolate(); | 258 Isolate* isolate = GetIsolate(); |
256 Object* feedback = GetFeedback(); | 259 Object* feedback = GetFeedback(); |
257 if (feedback == *vector()->UninitializedSentinel(isolate)) { | 260 if (feedback == *vector()->UninitializedSentinel(isolate)) { |
258 return UNINITIALIZED; | 261 return UNINITIALIZED; |
259 } else if (feedback == *vector()->PremonomorphicSentinel(isolate)) { | 262 } else if (feedback == *vector()->PremonomorphicSentinel(isolate)) { |
260 return PREMONOMORPHIC; | 263 return PREMONOMORPHIC; |
261 } else if (feedback == *vector()->MegamorphicSentinel(isolate)) { | |
262 return MEGAMORPHIC; | |
263 } else if (feedback == *vector()->GenericSentinel(isolate)) { | 264 } else if (feedback == *vector()->GenericSentinel(isolate)) { |
264 return GENERIC; | 265 return GENERIC; |
265 } else if (feedback->IsFixedArray()) { | 266 } else if (feedback->IsFixedArray()) { |
266 FixedArray* array = FixedArray::cast(feedback); | 267 FixedArray* array = FixedArray::cast(feedback); |
267 int length = array->length(); | 268 int length = array->length(); |
268 DCHECK(length >= 3); | 269 DCHECK(length >= 3); |
269 return length == 3 ? MONOMORPHIC : POLYMORPHIC; | 270 return length == 3 ? MONOMORPHIC : POLYMORPHIC; |
270 } | 271 } |
271 | 272 |
272 return UNINITIALIZED; | 273 return UNINITIALIZED; |
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315 void CallICNexus::ConfigureMonomorphic(Handle<JSFunction> function) { | 316 void CallICNexus::ConfigureMonomorphic(Handle<JSFunction> function) { |
316 SetFeedback(*function); | 317 SetFeedback(*function); |
317 } | 318 } |
318 | 319 |
319 | 320 |
320 void KeyedLoadICNexus::ConfigureGeneric() { | 321 void KeyedLoadICNexus::ConfigureGeneric() { |
321 SetFeedback(*vector()->GenericSentinel(GetIsolate()), SKIP_WRITE_BARRIER); | 322 SetFeedback(*vector()->GenericSentinel(GetIsolate()), SKIP_WRITE_BARRIER); |
322 } | 323 } |
323 | 324 |
324 | 325 |
325 void KeyedLoadICNexus::ConfigureMegamorphic() { | |
326 SetFeedback(*vector()->MegamorphicSentinel(GetIsolate()), SKIP_WRITE_BARRIER); | |
327 } | |
328 | |
329 | |
330 void LoadICNexus::ConfigureMegamorphic() { | 326 void LoadICNexus::ConfigureMegamorphic() { |
331 SetFeedback(*vector()->MegamorphicSentinel(GetIsolate()), SKIP_WRITE_BARRIER); | 327 SetFeedback(*vector()->MegamorphicSentinel(GetIsolate()), SKIP_WRITE_BARRIER); |
332 } | 328 } |
333 | 329 |
334 | 330 |
335 void LoadICNexus::ConfigurePremonomorphic() { | 331 void LoadICNexus::ConfigurePremonomorphic() { |
336 SetFeedback(*vector()->PremonomorphicSentinel(GetIsolate()), | 332 SetFeedback(*vector()->PremonomorphicSentinel(GetIsolate()), |
337 SKIP_WRITE_BARRIER); | 333 SKIP_WRITE_BARRIER); |
338 } | 334 } |
339 | 335 |
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492 if (feedback->IsFixedArray()) { | 488 if (feedback->IsFixedArray()) { |
493 FixedArray* array = FixedArray::cast(feedback); | 489 FixedArray* array = FixedArray::cast(feedback); |
494 DCHECK(array->length() >= 3); | 490 DCHECK(array->length() >= 3); |
495 Object* name = array->get(0); | 491 Object* name = array->get(0); |
496 if (name->IsName()) return Name::cast(name); | 492 if (name->IsName()) return Name::cast(name); |
497 } | 493 } |
498 return NULL; | 494 return NULL; |
499 } | 495 } |
500 } | 496 } |
501 } // namespace v8::internal | 497 } // namespace v8::internal |
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