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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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9869 FixedDoubleArray::cast(elements())->set(index, value->Number()); | 9869 FixedDoubleArray::cast(elements())->set(index, value->Number()); |
9870 ValidateElements(); | 9870 ValidateElements(); |
9871 return value; | 9871 return value; |
9872 } | 9872 } |
9873 // Change elements kind from Smi-only to generic FAST if necessary. | 9873 // Change elements kind from Smi-only to generic FAST if necessary. |
9874 if (HasFastSmiElements() && !value->IsSmi()) { | 9874 if (HasFastSmiElements() && !value->IsSmi()) { |
9875 Map* new_map; | 9875 Map* new_map; |
9876 ElementsKind kind = HasFastHoleyElements() | 9876 ElementsKind kind = HasFastHoleyElements() |
9877 ? FAST_HOLEY_ELEMENTS | 9877 ? FAST_HOLEY_ELEMENTS |
9878 : FAST_ELEMENTS; | 9878 : FAST_ELEMENTS; |
9879 | |
9880 MaybeObject* trans = PossiblyTransitionArrayBoilerplate(kind); | |
9881 if (trans->IsFailure()) return trans; | |
9882 | |
9879 MaybeObject* maybe_new_map = GetElementsTransitionMap(GetIsolate(), | 9883 MaybeObject* maybe_new_map = GetElementsTransitionMap(GetIsolate(), |
9880 kind); | 9884 kind); |
9881 if (!maybe_new_map->To(&new_map)) return maybe_new_map; | 9885 if (!maybe_new_map->To(&new_map)) return maybe_new_map; |
9882 | 9886 |
9883 set_map(new_map); | 9887 set_map(new_map); |
9884 } | 9888 } |
9885 // Increase backing store capacity if that's been decided previously. | 9889 // Increase backing store capacity if that's been decided previously. |
9886 if (new_capacity != capacity) { | 9890 if (new_capacity != capacity) { |
9887 FixedArray* new_elements; | 9891 FixedArray* new_elements; |
9888 SetFastElementsCapacitySmiMode smi_mode = | 9892 SetFastElementsCapacitySmiMode smi_mode = |
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10400 ElementsKind to_kind) { | 10404 ElementsKind to_kind) { |
10401 CALL_HEAP_FUNCTION(object->GetIsolate(), | 10405 CALL_HEAP_FUNCTION(object->GetIsolate(), |
10402 object->TransitionElementsKind(to_kind), | 10406 object->TransitionElementsKind(to_kind), |
10403 Object); | 10407 Object); |
10404 } | 10408 } |
10405 | 10409 |
10406 | 10410 |
10407 MaybeObject* JSObject::PossiblyTransitionArrayBoilerplate( | 10411 MaybeObject* JSObject::PossiblyTransitionArrayBoilerplate( |
10408 ElementsKind to_kind) { | 10412 ElementsKind to_kind) { |
10409 MaybeObject* ret = NULL; | 10413 MaybeObject* ret = NULL; |
10410 if (IsJSArray()) { | 10414 if (!FLAG_track_allocation_sites || !IsJSArray()) { |
10411 AllocationSiteInfo* info = AllocationSiteInfo::FindForJSObject(this); | 10415 return ret; |
10412 if (info != NULL) { | 10416 } |
10413 JSObject* payload = JSObject::cast(info->payload()); | 10417 |
10414 if (payload->GetElementsKind() != to_kind) { | 10418 AllocationSiteInfo* info = AllocationSiteInfo::FindForJSObject(this); |
10415 if (IsMoreGeneralElementsKindTransition(payload->GetElementsKind(), | 10419 if (info == NULL) { |
10416 to_kind)) { | 10420 return ret; |
10417 ret = payload->TransitionElementsKind(to_kind); | 10421 } |
10422 | |
10423 if (info->payload()->IsJSArray()) { | |
danno
2013/01/10 22:58:59
You might not need this additional checks yet if y
mvstanton
2013/01/11 13:43:01
Ah, this if is a relic (or forebearer?) of the cha
| |
10424 JSArray* payload = JSArray::cast(info->payload()); | |
10425 ElementsKind kind = payload->GetElementsKind(); | |
10426 if (IsMoreGeneralElementsKindTransition(kind, to_kind)) { | |
10427 // If the array is huge, it's not likely to be defined in a local | |
10428 // function, so we shouldn't make new instances of it very often. | |
10429 uint32_t length = 0; | |
10430 CHECK(payload->length()->ToArrayIndex(&length)); | |
10431 if (length <= 8*1024) { | |
10432 ret = payload->TransitionElementsKind(to_kind); | |
10433 if (FLAG_trace_track_allocation_sites) { | |
10434 PrintF( | |
10435 "AllocationSiteInfo: JSArray %p boilerplate updated %s->%s\n", | |
10436 reinterpret_cast<void*>(this), | |
10437 ElementsKindToString(kind), | |
10438 ElementsKindToString(to_kind)); | |
10418 } | 10439 } |
10419 } | 10440 } |
10420 } | 10441 } |
10421 } | 10442 } |
10422 return ret; | 10443 return ret; |
10423 } | 10444 } |
10424 | 10445 |
10425 | 10446 |
10426 MaybeObject* JSObject::TransitionElementsKind(ElementsKind to_kind) { | 10447 MaybeObject* JSObject::TransitionElementsKind(ElementsKind to_kind) { |
10427 ASSERT(!map()->is_observed()); | 10448 ASSERT(!map()->is_observed()); |
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13780 set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER); | 13801 set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER); |
13781 set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER); | 13802 set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER); |
13782 set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER); | 13803 set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER); |
13783 set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER); | 13804 set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER); |
13784 set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER); | 13805 set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER); |
13785 set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER); | 13806 set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER); |
13786 set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER); | 13807 set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER); |
13787 } | 13808 } |
13788 | 13809 |
13789 } } // namespace v8::internal | 13810 } } // namespace v8::internal |
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