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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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