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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 // 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/builtins.h" | 5 #include "src/builtins.h" |
6 | 6 |
7 #include "src/api.h" | 7 #include "src/api.h" |
8 #include "src/api-natives.h" | 8 #include "src/api-natives.h" |
9 #include "src/arguments.h" | 9 #include "src/arguments.h" |
10 #include "src/base/once.h" | 10 #include "src/base/once.h" |
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1221 HandleScope loop_scope(isolate); | 1221 HandleScope loop_scope(isolate); |
1222 Handle<Object> obj((*args)[i], isolate); | 1222 Handle<Object> obj((*args)[i], isolate); |
1223 uint32_t length_estimate; | 1223 uint32_t length_estimate; |
1224 uint32_t element_estimate; | 1224 uint32_t element_estimate; |
1225 if (obj->IsJSArray()) { | 1225 if (obj->IsJSArray()) { |
1226 Handle<JSArray> array(Handle<JSArray>::cast(obj)); | 1226 Handle<JSArray> array(Handle<JSArray>::cast(obj)); |
1227 length_estimate = static_cast<uint32_t>(array->length()->Number()); | 1227 length_estimate = static_cast<uint32_t>(array->length()->Number()); |
1228 if (length_estimate != 0) { | 1228 if (length_estimate != 0) { |
1229 ElementsKind array_kind = | 1229 ElementsKind array_kind = |
1230 GetPackedElementsKind(array->map()->elements_kind()); | 1230 GetPackedElementsKind(array->map()->elements_kind()); |
1231 if (IsMoreGeneralElementsKindTransition(kind, array_kind)) { | 1231 kind = GetMoreGeneralElementsKind(kind, array_kind); |
1232 kind = array_kind; | |
1233 } | |
1234 } | 1232 } |
1235 element_estimate = EstimateElementCount(array); | 1233 element_estimate = EstimateElementCount(array); |
1236 } else { | 1234 } else { |
1237 if (obj->IsHeapObject()) { | 1235 if (obj->IsHeapObject()) { |
1238 if (obj->IsNumber()) { | 1236 if (obj->IsNumber()) { |
1239 if (IsMoreGeneralElementsKindTransition(kind, FAST_DOUBLE_ELEMENTS)) { | 1237 kind = GetMoreGeneralElementsKind(kind, FAST_DOUBLE_ELEMENTS); |
1240 kind = FAST_DOUBLE_ELEMENTS; | 1238 } else { |
1241 } | 1239 kind = GetMoreGeneralElementsKind(kind, FAST_ELEMENTS); |
1242 } else if (IsMoreGeneralElementsKindTransition(kind, FAST_ELEMENTS)) { | |
1243 kind = FAST_ELEMENTS; | |
1244 } | 1240 } |
1245 } | 1241 } |
1246 length_estimate = 1; | 1242 length_estimate = 1; |
1247 element_estimate = 1; | 1243 element_estimate = 1; |
1248 } | 1244 } |
1249 // Avoid overflows by capping at kMaxElementCount. | 1245 // Avoid overflows by capping at kMaxElementCount. |
1250 if (JSObject::kMaxElementCount - estimate_result_length < length_estimate) { | 1246 if (JSObject::kMaxElementCount - estimate_result_length < length_estimate) { |
1251 estimate_result_length = JSObject::kMaxElementCount; | 1247 estimate_result_length = JSObject::kMaxElementCount; |
1252 } else { | 1248 } else { |
1253 estimate_result_length += length_estimate; | 1249 estimate_result_length += length_estimate; |
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2074 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) | 2070 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) |
2075 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) | 2071 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) |
2076 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H) | 2072 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H) |
2077 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) | 2073 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) |
2078 #undef DEFINE_BUILTIN_ACCESSOR_C | 2074 #undef DEFINE_BUILTIN_ACCESSOR_C |
2079 #undef DEFINE_BUILTIN_ACCESSOR_A | 2075 #undef DEFINE_BUILTIN_ACCESSOR_A |
2080 | 2076 |
2081 | 2077 |
2082 } // namespace internal | 2078 } // namespace internal |
2083 } // namespace v8 | 2079 } // namespace v8 |
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