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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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32 #include "utils.h" | 32 #include "utils.h" |
33 | 33 |
34 namespace v8 { | 34 namespace v8 { |
35 namespace internal { | 35 namespace internal { |
36 | 36 |
37 | 37 |
38 MaybeObject* TransitionArray::Allocate(int number_of_transitions) { | 38 MaybeObject* TransitionArray::Allocate(int number_of_transitions) { |
39 Heap* heap = Isolate::Current()->heap(); | 39 Heap* heap = Isolate::Current()->heap(); |
40 // Use FixedArray to not use DescriptorArray::cast on incomplete object. | 40 // Use FixedArray to not use DescriptorArray::cast on incomplete object. |
41 FixedArray* array; | 41 FixedArray* array; |
42 { MaybeObject* maybe_array = | 42 MaybeObject* maybe_array = |
43 heap->AllocateFixedArray(ToKeyIndex(number_of_transitions)); | 43 heap->AllocateFixedArray(ToKeyIndex(number_of_transitions)); |
44 if (!maybe_array->To(&array)) return maybe_array; | 44 if (!maybe_array->To(&array)) return maybe_array; |
45 } | |
46 | 45 |
47 array->set(kElementsTransitionIndex, Smi::FromInt(0)); | 46 array->set(kElementsTransitionIndex, Smi::FromInt(0)); |
48 array->set(kPrototypeTransitionsIndex, Smi::FromInt(0)); | 47 array->set(kPrototypeTransitionsIndex, Smi::FromInt(0)); |
49 return array; | 48 return array; |
50 } | 49 } |
51 | 50 |
52 | 51 |
53 void TransitionArray::CopyFrom(TransitionArray* origin, | 52 void TransitionArray::CopyFrom(TransitionArray* origin, |
54 int origin_transition, | 53 int origin_transition, |
55 int target_transition, | 54 int target_transition, |
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120 | 119 |
121 for (; insertion_index < number_of_transitions; ++insertion_index) { | 120 for (; insertion_index < number_of_transitions; ++insertion_index) { |
122 result->CopyFrom(this, insertion_index, insertion_index + 1, witness); | 121 result->CopyFrom(this, insertion_index, insertion_index + 1, witness); |
123 } | 122 } |
124 | 123 |
125 return result; | 124 return result; |
126 } | 125 } |
127 | 126 |
128 | 127 |
129 } } // namespace v8::internal | 128 } } // namespace v8::internal |
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