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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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2314 current = | 2314 current = |
2315 Handle<HeapObject>(HeapObject::cast(current->map()->prototype())); | 2315 Handle<HeapObject>(HeapObject::cast(current->map()->prototype())); |
2316 } | 2316 } |
2317 __ LoadRoot(result, Heap::kUndefinedValueRootIndex); | 2317 __ LoadRoot(result, Heap::kUndefinedValueRootIndex); |
2318 } | 2318 } |
2319 } | 2319 } |
2320 | 2320 |
2321 | 2321 |
2322 // Check for cases where EmitLoadFieldOrConstantFunction needs to walk the | 2322 // Check for cases where EmitLoadFieldOrConstantFunction needs to walk the |
2323 // prototype chain, which causes unbounded code generation. | 2323 // prototype chain, which causes unbounded code generation. |
2324 static bool CompactEmit( | 2324 static bool CompactEmit(SmallMapList* list, |
2325 SmallMapList* list, Handle<String> name, int i, Isolate* isolate) { | 2325 Handle<String> name, |
| 2326 int i, |
| 2327 Isolate* isolate) { |
| 2328 Handle<Map> map = list->at(i); |
| 2329 // If the map has ElementsKind transitions, we will generate map checks |
| 2330 // for each kind in __ CompareMap(..., ALLOW_ELEMENTS_TRANSITION_MAPS). |
| 2331 if (map->elements_transition_map() != NULL) return false; |
2326 LookupResult lookup(isolate); | 2332 LookupResult lookup(isolate); |
2327 Handle<Map> map = list->at(i); | |
2328 map->LookupInDescriptors(NULL, *name, &lookup); | 2333 map->LookupInDescriptors(NULL, *name, &lookup); |
2329 return lookup.IsField() || lookup.IsConstantFunction(); | 2334 return lookup.IsField() || lookup.IsConstantFunction(); |
2330 } | 2335 } |
2331 | 2336 |
2332 | 2337 |
2333 void LCodeGen::DoLoadNamedFieldPolymorphic(LLoadNamedFieldPolymorphic* instr) { | 2338 void LCodeGen::DoLoadNamedFieldPolymorphic(LLoadNamedFieldPolymorphic* instr) { |
2334 Register object = ToRegister(instr->object()); | 2339 Register object = ToRegister(instr->object()); |
2335 Register result = ToRegister(instr->result()); | 2340 Register result = ToRegister(instr->result()); |
2336 | 2341 |
2337 int map_count = instr->hydrogen()->types()->length(); | 2342 int map_count = instr->hydrogen()->types()->length(); |
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5030 FixedArray::kHeaderSize - kPointerSize)); | 5035 FixedArray::kHeaderSize - kPointerSize)); |
5031 __ bind(&done); | 5036 __ bind(&done); |
5032 } | 5037 } |
5033 | 5038 |
5034 | 5039 |
5035 #undef __ | 5040 #undef __ |
5036 | 5041 |
5037 } } // namespace v8::internal | 5042 } } // namespace v8::internal |
5038 | 5043 |
5039 #endif // V8_TARGET_ARCH_X64 | 5044 #endif // V8_TARGET_ARCH_X64 |
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