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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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| 817 // Make sure there's no overlap between holder and object registers. | 817 // Make sure there's no overlap between holder and object registers. |
| 818 ASSERT(!scratch1.is(object_reg) && !scratch1.is(holder_reg)); | 818 ASSERT(!scratch1.is(object_reg) && !scratch1.is(holder_reg)); |
| 819 ASSERT(!scratch2.is(object_reg) && !scratch2.is(holder_reg) | 819 ASSERT(!scratch2.is(object_reg) && !scratch2.is(holder_reg) |
| 820 && !scratch2.is(scratch1)); | 820 && !scratch2.is(scratch1)); |
| 821 | 821 |
| 822 // Keep track of the current object in register reg. | 822 // Keep track of the current object in register reg. |
| 823 Register reg = object_reg; | 823 Register reg = object_reg; |
| 824 int depth = 0; | 824 int depth = 0; |
| 825 | 825 |
| 826 Handle<JSObject> current = Handle<JSObject>::null(); | 826 Handle<JSObject> current = Handle<JSObject>::null(); |
| 827 if (type->IsConstant()) current = Handle<JSObject>::cast(type->AsConstant()); | 827 if (type->IsConstant()) current = |
| 828 Handle<JSObject>::cast(type->AsConstant()->Value()); |
| 828 Handle<JSObject> prototype = Handle<JSObject>::null(); | 829 Handle<JSObject> prototype = Handle<JSObject>::null(); |
| 829 Handle<Map> current_map = receiver_map; | 830 Handle<Map> current_map = receiver_map; |
| 830 Handle<Map> holder_map(holder->map()); | 831 Handle<Map> holder_map(holder->map()); |
| 831 // Traverse the prototype chain and check the maps in the prototype chain for | 832 // Traverse the prototype chain and check the maps in the prototype chain for |
| 832 // fast and global objects or do negative lookup for normal objects. | 833 // fast and global objects or do negative lookup for normal objects. |
| 833 while (!current_map.is_identical_to(holder_map)) { | 834 while (!current_map.is_identical_to(holder_map)) { |
| 834 ++depth; | 835 ++depth; |
| 835 | 836 |
| 836 // Only global objects and objects that do not require access | 837 // Only global objects and objects that do not require access |
| 837 // checks are allowed in stubs. | 838 // checks are allowed in stubs. |
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| 1535 // ----------------------------------- | 1536 // ----------------------------------- |
| 1536 TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss); | 1537 TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss); |
| 1537 } | 1538 } |
| 1538 | 1539 |
| 1539 | 1540 |
| 1540 #undef __ | 1541 #undef __ |
| 1541 | 1542 |
| 1542 } } // namespace v8::internal | 1543 } } // namespace v8::internal |
| 1543 | 1544 |
| 1544 #endif // V8_TARGET_ARCH_IA32 | 1545 #endif // V8_TARGET_ARCH_IA32 |
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