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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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653 } | 653 } |
654 | 654 |
655 | 655 |
656 BUILTIN(ArraySlice) { | 656 BUILTIN(ArraySlice) { |
657 Heap* heap = isolate->heap(); | 657 Heap* heap = isolate->heap(); |
658 Object* receiver = *args.receiver(); | 658 Object* receiver = *args.receiver(); |
659 FixedArray* elms; | 659 FixedArray* elms; |
660 int len = -1; | 660 int len = -1; |
661 if (receiver->IsJSArray()) { | 661 if (receiver->IsJSArray()) { |
662 JSArray* array = JSArray::cast(receiver); | 662 JSArray* array = JSArray::cast(receiver); |
663 if (!array->HasFastElements() || | 663 if (!array->HasFastTypeElements() || |
664 !IsJSArrayFastElementMovingAllowed(heap, array)) { | 664 !IsJSArrayFastElementMovingAllowed(heap, array)) { |
665 return CallJsBuiltin(isolate, "ArraySlice", args); | 665 return CallJsBuiltin(isolate, "ArraySlice", args); |
666 } | 666 } |
667 | 667 |
668 elms = FixedArray::cast(array->elements()); | 668 elms = FixedArray::cast(array->elements()); |
669 len = Smi::cast(array->length())->value(); | 669 len = Smi::cast(array->length())->value(); |
670 } else { | 670 } else { |
671 // Array.slice(arguments, ...) is quite a common idiom (notably more | 671 // Array.slice(arguments, ...) is quite a common idiom (notably more |
672 // than 50% of invocations in Web apps). Treat it in C++ as well. | 672 // than 50% of invocations in Web apps). Treat it in C++ as well. |
673 Map* arguments_map = | 673 Map* arguments_map = |
674 isolate->context()->global_context()->arguments_boilerplate()->map(); | 674 isolate->context()->global_context()->arguments_boilerplate()->map(); |
675 | 675 |
676 bool is_arguments_object_with_fast_elements = | 676 bool is_arguments_object_with_fast_elements = |
677 receiver->IsJSObject() | 677 receiver->IsJSObject() |
678 && JSObject::cast(receiver)->map() == arguments_map | 678 && JSObject::cast(receiver)->map() == arguments_map |
679 && JSObject::cast(receiver)->HasFastElements(); | 679 && JSObject::cast(receiver)->HasFastTypeElements(); |
680 if (!is_arguments_object_with_fast_elements) { | 680 if (!is_arguments_object_with_fast_elements) { |
681 return CallJsBuiltin(isolate, "ArraySlice", args); | 681 return CallJsBuiltin(isolate, "ArraySlice", args); |
682 } | 682 } |
683 elms = FixedArray::cast(JSObject::cast(receiver)->elements()); | 683 elms = FixedArray::cast(JSObject::cast(receiver)->elements()); |
684 Object* len_obj = JSObject::cast(receiver) | 684 Object* len_obj = JSObject::cast(receiver) |
685 ->InObjectPropertyAt(Heap::kArgumentsLengthIndex); | 685 ->InObjectPropertyAt(Heap::kArgumentsLengthIndex); |
686 if (!len_obj->IsSmi()) { | 686 if (!len_obj->IsSmi()) { |
687 return CallJsBuiltin(isolate, "ArraySlice", args); | 687 return CallJsBuiltin(isolate, "ArraySlice", args); |
688 } | 688 } |
689 len = Smi::cast(len_obj)->value(); | 689 len = Smi::cast(len_obj)->value(); |
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956 if (!ArrayPrototypeHasNoElements(heap, global_context, array_proto)) { | 956 if (!ArrayPrototypeHasNoElements(heap, global_context, array_proto)) { |
957 return CallJsBuiltin(isolate, "ArrayConcat", args); | 957 return CallJsBuiltin(isolate, "ArrayConcat", args); |
958 } | 958 } |
959 | 959 |
960 // Iterate through all the arguments performing checks | 960 // Iterate through all the arguments performing checks |
961 // and calculating total length. | 961 // and calculating total length. |
962 int n_arguments = args.length(); | 962 int n_arguments = args.length(); |
963 int result_len = 0; | 963 int result_len = 0; |
964 for (int i = 0; i < n_arguments; i++) { | 964 for (int i = 0; i < n_arguments; i++) { |
965 Object* arg = args[i]; | 965 Object* arg = args[i]; |
966 if (!arg->IsJSArray() || !JSArray::cast(arg)->HasFastElements() | 966 if (!arg->IsJSArray() || !JSArray::cast(arg)->HasFastTypeElements() |
967 || JSArray::cast(arg)->GetPrototype() != array_proto) { | 967 || JSArray::cast(arg)->GetPrototype() != array_proto) { |
968 return CallJsBuiltin(isolate, "ArrayConcat", args); | 968 return CallJsBuiltin(isolate, "ArrayConcat", args); |
969 } | 969 } |
970 | 970 |
971 int len = Smi::cast(JSArray::cast(arg)->length())->value(); | 971 int len = Smi::cast(JSArray::cast(arg)->length())->value(); |
972 | 972 |
973 // We shouldn't overflow when adding another len. | 973 // We shouldn't overflow when adding another len. |
974 const int kHalfOfMaxInt = 1 << (kBitsPerInt - 2); | 974 const int kHalfOfMaxInt = 1 << (kBitsPerInt - 2); |
975 STATIC_ASSERT(FixedArray::kMaxLength < kHalfOfMaxInt); | 975 STATIC_ASSERT(FixedArray::kMaxLength < kHalfOfMaxInt); |
976 USE(kHalfOfMaxInt); | 976 USE(kHalfOfMaxInt); |
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1761 return Handle<Code>(code_address); \ | 1761 return Handle<Code>(code_address); \ |
1762 } | 1762 } |
1763 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) | 1763 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) |
1764 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) | 1764 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) |
1765 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) | 1765 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) |
1766 #undef DEFINE_BUILTIN_ACCESSOR_C | 1766 #undef DEFINE_BUILTIN_ACCESSOR_C |
1767 #undef DEFINE_BUILTIN_ACCESSOR_A | 1767 #undef DEFINE_BUILTIN_ACCESSOR_A |
1768 | 1768 |
1769 | 1769 |
1770 } } // namespace v8::internal | 1770 } } // namespace v8::internal |
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