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Side by Side Diff: src/type-feedback-vector.cc

Issue 767743002: Hydrogen code stubs for vector-based ICs. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Comment response. Created 6 years ago
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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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251 } 255 }
252 256
253 257
254 InlineCacheState KeyedLoadICNexus::StateFromFeedback() const { 258 InlineCacheState KeyedLoadICNexus::StateFromFeedback() const {
255 Isolate* isolate = GetIsolate(); 259 Isolate* isolate = GetIsolate();
256 Object* feedback = GetFeedback(); 260 Object* feedback = GetFeedback();
257 if (feedback == *vector()->UninitializedSentinel(isolate)) { 261 if (feedback == *vector()->UninitializedSentinel(isolate)) {
258 return UNINITIALIZED; 262 return UNINITIALIZED;
259 } else if (feedback == *vector()->PremonomorphicSentinel(isolate)) { 263 } else if (feedback == *vector()->PremonomorphicSentinel(isolate)) {
260 return PREMONOMORPHIC; 264 return PREMONOMORPHIC;
261 } else if (feedback == *vector()->MegamorphicSentinel(isolate)) {
262 return MEGAMORPHIC;
263 } else if (feedback == *vector()->GenericSentinel(isolate)) { 265 } else if (feedback == *vector()->GenericSentinel(isolate)) {
264 return GENERIC; 266 return GENERIC;
265 } else if (feedback->IsFixedArray()) { 267 } else if (feedback->IsFixedArray()) {
266 FixedArray* array = FixedArray::cast(feedback); 268 FixedArray* array = FixedArray::cast(feedback);
267 int length = array->length(); 269 int length = array->length();
268 DCHECK(length >= 3); 270 DCHECK(length >= 3);
269 return length == 3 ? MONOMORPHIC : POLYMORPHIC; 271 return length == 3 ? MONOMORPHIC : POLYMORPHIC;
270 } 272 }
271 273
272 return UNINITIALIZED; 274 return UNINITIALIZED;
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315 void CallICNexus::ConfigureMonomorphic(Handle<JSFunction> function) { 317 void CallICNexus::ConfigureMonomorphic(Handle<JSFunction> function) {
316 SetFeedback(*function); 318 SetFeedback(*function);
317 } 319 }
318 320
319 321
320 void KeyedLoadICNexus::ConfigureGeneric() { 322 void KeyedLoadICNexus::ConfigureGeneric() {
321 SetFeedback(*vector()->GenericSentinel(GetIsolate()), SKIP_WRITE_BARRIER); 323 SetFeedback(*vector()->GenericSentinel(GetIsolate()), SKIP_WRITE_BARRIER);
322 } 324 }
323 325
324 326
325 void KeyedLoadICNexus::ConfigureMegamorphic() {
326 SetFeedback(*vector()->MegamorphicSentinel(GetIsolate()), SKIP_WRITE_BARRIER);
327 }
328
329
330 void LoadICNexus::ConfigureMegamorphic() { 327 void LoadICNexus::ConfigureMegamorphic() {
331 SetFeedback(*vector()->MegamorphicSentinel(GetIsolate()), SKIP_WRITE_BARRIER); 328 SetFeedback(*vector()->MegamorphicSentinel(GetIsolate()), SKIP_WRITE_BARRIER);
332 } 329 }
333 330
334 331
335 void LoadICNexus::ConfigurePremonomorphic() { 332 void LoadICNexus::ConfigurePremonomorphic() {
336 SetFeedback(*vector()->PremonomorphicSentinel(GetIsolate()), 333 SetFeedback(*vector()->PremonomorphicSentinel(GetIsolate()),
337 SKIP_WRITE_BARRIER); 334 SKIP_WRITE_BARRIER);
338 } 335 }
339 336
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492 if (feedback->IsFixedArray()) { 489 if (feedback->IsFixedArray()) {
493 FixedArray* array = FixedArray::cast(feedback); 490 FixedArray* array = FixedArray::cast(feedback);
494 DCHECK(array->length() >= 3); 491 DCHECK(array->length() >= 3);
495 Object* name = array->get(0); 492 Object* name = array->get(0);
496 if (name->IsName()) return Name::cast(name); 493 if (name->IsName()) return Name::cast(name);
497 } 494 }
498 return NULL; 495 return NULL;
499 } 496 }
500 } 497 }
501 } // namespace v8::internal 498 } // namespace v8::internal
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