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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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| 135 for (int i = 0; i < kFastElementsKindCount; ++i) { | 135 for (int i = 0; i < kFastElementsKindCount; ++i) { |
| 136 if (fast_elements_kind_sequence.Get()[i] == elements_kind) { | 136 if (fast_elements_kind_sequence.Get()[i] == elements_kind) { |
| 137 return i; | 137 return i; |
| 138 } | 138 } |
| 139 } | 139 } |
| 140 UNREACHABLE(); | 140 UNREACHABLE(); |
| 141 return 0; | 141 return 0; |
| 142 } | 142 } |
| 143 | 143 |
| 144 | 144 |
| 145 ElementsKind GetNextTransitionElementsKind(ElementsKind kind) { | |
| 146 switch (kind) { | |
| 147 #define FIXED_TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \ | |
| 148 case TYPE##_ELEMENTS: return EXTERNAL_##TYPE##_ELEMENTS; | |
| 149 | |
| 150 TYPED_ARRAYS(FIXED_TYPED_ARRAY_CASE) | |
| 151 #undef FIXED_TYPED_ARRAY_CASE | |
| 152 default: { | |
| 153 int index = GetSequenceIndexFromFastElementsKind(kind); | |
| 154 return GetFastElementsKindFromSequenceIndex(index + 1); | |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 | |
| 160 ElementsKind GetNextMoreGeneralFastElementsKind(ElementsKind elements_kind, | 145 ElementsKind GetNextMoreGeneralFastElementsKind(ElementsKind elements_kind, |
| 161 bool allow_only_packed) { | 146 bool allow_only_packed) { |
| 162 ASSERT(IsFastElementsKind(elements_kind)); | 147 ASSERT(IsFastElementsKind(elements_kind)); |
| 163 ASSERT(elements_kind != TERMINAL_FAST_ELEMENTS_KIND); | 148 ASSERT(elements_kind != TERMINAL_FAST_ELEMENTS_KIND); |
| 164 while (true) { | 149 while (true) { |
| 165 elements_kind = GetNextTransitionElementsKind(elements_kind); | 150 int index = |
| 151 GetSequenceIndexFromFastElementsKind(elements_kind) + 1; |
| 152 elements_kind = GetFastElementsKindFromSequenceIndex(index); |
| 166 if (!IsFastHoleyElementsKind(elements_kind) || !allow_only_packed) { | 153 if (!IsFastHoleyElementsKind(elements_kind) || !allow_only_packed) { |
| 167 return elements_kind; | 154 return elements_kind; |
| 168 } | 155 } |
| 169 } | 156 } |
| 170 UNREACHABLE(); | 157 UNREACHABLE(); |
| 171 return TERMINAL_FAST_ELEMENTS_KIND; | 158 return TERMINAL_FAST_ELEMENTS_KIND; |
| 172 } | 159 } |
| 173 | 160 |
| 174 | 161 |
| 175 bool IsMoreGeneralElementsKindTransition(ElementsKind from_kind, | 162 bool IsMoreGeneralElementsKindTransition(ElementsKind from_kind, |
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| 191 return to_kind == FAST_HOLEY_ELEMENTS; | 178 return to_kind == FAST_HOLEY_ELEMENTS; |
| 192 case FAST_HOLEY_ELEMENTS: | 179 case FAST_HOLEY_ELEMENTS: |
| 193 return false; | 180 return false; |
| 194 default: | 181 default: |
| 195 return false; | 182 return false; |
| 196 } | 183 } |
| 197 } | 184 } |
| 198 | 185 |
| 199 | 186 |
| 200 } } // namespace v8::internal | 187 } } // namespace v8::internal |
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