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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_ARM64 | 7 #if V8_TARGET_ARCH_ARM64 |
8 | 8 |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/ic-inl.h" | 10 #include "src/ic-inl.h" |
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684 while (!current_map.is_identical_to(holder_map)) { | 684 while (!current_map.is_identical_to(holder_map)) { |
685 ++depth; | 685 ++depth; |
686 | 686 |
687 // Only global objects and objects that do not require access | 687 // Only global objects and objects that do not require access |
688 // checks are allowed in stubs. | 688 // checks are allowed in stubs. |
689 DCHECK(current_map->IsJSGlobalProxyMap() || | 689 DCHECK(current_map->IsJSGlobalProxyMap() || |
690 !current_map->is_access_check_needed()); | 690 !current_map->is_access_check_needed()); |
691 | 691 |
692 prototype = handle(JSObject::cast(current_map->prototype())); | 692 prototype = handle(JSObject::cast(current_map->prototype())); |
693 if (current_map->is_dictionary_map() && | 693 if (current_map->is_dictionary_map() && |
694 !current_map->IsJSGlobalObjectMap() && | 694 !current_map->IsJSGlobalObjectMap()) { |
695 !current_map->IsJSGlobalProxyMap()) { | 695 DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. |
696 if (!name->IsUniqueName()) { | 696 if (!name->IsUniqueName()) { |
697 DCHECK(name->IsString()); | 697 DCHECK(name->IsString()); |
698 name = factory()->InternalizeString(Handle<String>::cast(name)); | 698 name = factory()->InternalizeString(Handle<String>::cast(name)); |
699 } | 699 } |
700 DCHECK(current.is_null() || | 700 DCHECK(current.is_null() || |
701 (current->property_dictionary()->FindEntry(name) == | 701 (current->property_dictionary()->FindEntry(name) == |
702 NameDictionary::kNotFound)); | 702 NameDictionary::kNotFound)); |
703 | 703 |
704 GenerateDictionaryNegativeLookup(masm(), miss, reg, name, | 704 GenerateDictionaryNegativeLookup(masm(), miss, reg, name, |
705 scratch1, scratch2); | 705 scratch1, scratch2); |
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717 Register map_reg = scratch1; | 717 Register map_reg = scratch1; |
718 __ Ldr(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset)); | 718 __ Ldr(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset)); |
719 | 719 |
720 if (depth != 1 || check == CHECK_ALL_MAPS) { | 720 if (depth != 1 || check == CHECK_ALL_MAPS) { |
721 __ CheckMap(map_reg, current_map, miss, DONT_DO_SMI_CHECK); | 721 __ CheckMap(map_reg, current_map, miss, DONT_DO_SMI_CHECK); |
722 } | 722 } |
723 | 723 |
724 // Check access rights to the global object. This has to happen after | 724 // Check access rights to the global object. This has to happen after |
725 // the map check so that we know that the object is actually a global | 725 // the map check so that we know that the object is actually a global |
726 // object. | 726 // object. |
| 727 // This allows us to install generated handlers for accesses to the |
| 728 // global proxy (as opposed to using slow ICs). See corresponding code |
| 729 // in LookupForRead(). |
727 if (current_map->IsJSGlobalProxyMap()) { | 730 if (current_map->IsJSGlobalProxyMap()) { |
728 UseScratchRegisterScope temps(masm()); | 731 UseScratchRegisterScope temps(masm()); |
729 __ CheckAccessGlobalProxy(reg, scratch2, temps.AcquireX(), miss); | 732 __ CheckAccessGlobalProxy(reg, scratch2, temps.AcquireX(), miss); |
730 } else if (current_map->IsJSGlobalObjectMap()) { | 733 } else if (current_map->IsJSGlobalObjectMap()) { |
731 GenerateCheckPropertyCell( | 734 GenerateCheckPropertyCell( |
732 masm(), Handle<JSGlobalObject>::cast(current), name, | 735 masm(), Handle<JSGlobalObject>::cast(current), name, |
733 scratch2, miss); | 736 scratch2, miss); |
734 } | 737 } |
735 | 738 |
736 reg = holder_reg; // From now on the object will be in holder_reg. | 739 reg = holder_reg; // From now on the object will be in holder_reg. |
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1298 | 1301 |
1299 // Miss case, call the runtime. | 1302 // Miss case, call the runtime. |
1300 __ Bind(&miss); | 1303 __ Bind(&miss); |
1301 TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss); | 1304 TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss); |
1302 } | 1305 } |
1303 | 1306 |
1304 | 1307 |
1305 } } // namespace v8::internal | 1308 } } // namespace v8::internal |
1306 | 1309 |
1307 #endif // V8_TARGET_ARCH_ARM64 | 1310 #endif // V8_TARGET_ARCH_ARM64 |
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