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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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5992 } | 5992 } |
5993 } else { | 5993 } else { |
5994 for (int i = 0; i < prototypes->length(); i++) { | 5994 for (int i = 0; i < prototypes->length(); i++) { |
5995 __ LoadHeapObject(reg, prototypes->at(i)); | 5995 __ LoadHeapObject(reg, prototypes->at(i)); |
5996 DoCheckMapCommon(reg, maps->at(i), instr); | 5996 DoCheckMapCommon(reg, maps->at(i), instr); |
5997 } | 5997 } |
5998 } | 5998 } |
5999 } | 5999 } |
6000 | 6000 |
6001 | 6001 |
6002 void LCodeGen::DoAllocateObject(LAllocateObject* instr) { | |
6003 class DeferredAllocateObject: public LDeferredCode { | |
6004 public: | |
6005 DeferredAllocateObject(LCodeGen* codegen, LAllocateObject* instr) | |
6006 : LDeferredCode(codegen), instr_(instr) { } | |
6007 virtual void Generate() { codegen()->DoDeferredAllocateObject(instr_); } | |
6008 virtual LInstruction* instr() { return instr_; } | |
6009 private: | |
6010 LAllocateObject* instr_; | |
6011 }; | |
6012 | |
6013 DeferredAllocateObject* deferred = | |
6014 new(zone()) DeferredAllocateObject(this, instr); | |
6015 | |
6016 Register result = ToRegister(instr->result()); | |
6017 Register scratch = ToRegister(instr->temp()); | |
6018 Handle<JSFunction> constructor = instr->hydrogen()->constructor(); | |
6019 Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map(); | |
6020 int instance_size = initial_map->instance_size(); | |
6021 ASSERT(initial_map->pre_allocated_property_fields() + | |
6022 initial_map->unused_property_fields() - | |
6023 initial_map->inobject_properties() == 0); | |
6024 | |
6025 __ Allocate(instance_size, result, no_reg, scratch, deferred->entry(), | |
6026 TAG_OBJECT); | |
6027 | |
6028 __ bind(deferred->exit()); | |
6029 if (FLAG_debug_code) { | |
6030 Label is_in_new_space; | |
6031 __ JumpIfInNewSpace(result, scratch, &is_in_new_space); | |
6032 __ Abort("Allocated object is not in new-space"); | |
6033 __ bind(&is_in_new_space); | |
6034 } | |
6035 | |
6036 // Load the initial map. | |
6037 Register map = scratch; | |
6038 __ LoadHeapObject(scratch, constructor); | |
6039 __ mov(map, FieldOperand(scratch, JSFunction::kPrototypeOrInitialMapOffset)); | |
6040 | |
6041 if (FLAG_debug_code) { | |
6042 __ AssertNotSmi(map); | |
6043 __ cmpb(FieldOperand(map, Map::kInstanceSizeOffset), | |
6044 instance_size >> kPointerSizeLog2); | |
6045 __ Assert(equal, "Unexpected instance size"); | |
6046 __ cmpb(FieldOperand(map, Map::kPreAllocatedPropertyFieldsOffset), | |
6047 initial_map->pre_allocated_property_fields()); | |
6048 __ Assert(equal, "Unexpected pre-allocated property fields count"); | |
6049 __ cmpb(FieldOperand(map, Map::kUnusedPropertyFieldsOffset), | |
6050 initial_map->unused_property_fields()); | |
6051 __ Assert(equal, "Unexpected unused property fields count"); | |
6052 __ cmpb(FieldOperand(map, Map::kInObjectPropertiesOffset), | |
6053 initial_map->inobject_properties()); | |
6054 __ Assert(equal, "Unexpected in-object property fields count"); | |
6055 } | |
6056 | |
6057 // Initialize map and fields of the newly allocated object. | |
6058 ASSERT(initial_map->instance_type() == JS_OBJECT_TYPE); | |
6059 __ mov(FieldOperand(result, JSObject::kMapOffset), map); | |
6060 __ mov(scratch, factory()->empty_fixed_array()); | |
6061 __ mov(FieldOperand(result, JSObject::kElementsOffset), scratch); | |
6062 __ mov(FieldOperand(result, JSObject::kPropertiesOffset), scratch); | |
6063 if (initial_map->inobject_properties() != 0) { | |
6064 __ mov(scratch, factory()->undefined_value()); | |
6065 for (int i = 0; i < initial_map->inobject_properties(); i++) { | |
6066 int property_offset = JSObject::kHeaderSize + i * kPointerSize; | |
6067 __ mov(FieldOperand(result, property_offset), scratch); | |
6068 } | |
6069 } | |
6070 } | |
6071 | |
6072 | |
6073 void LCodeGen::DoDeferredAllocateObject(LAllocateObject* instr) { | |
6074 Register result = ToRegister(instr->result()); | |
6075 Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map(); | |
6076 int instance_size = initial_map->instance_size(); | |
6077 | |
6078 // TODO(3095996): Get rid of this. For now, we need to make the | |
6079 // result register contain a valid pointer because it is already | |
6080 // contained in the register pointer map. | |
6081 __ Set(result, Immediate(0)); | |
6082 | |
6083 PushSafepointRegistersScope scope(this); | |
6084 __ push(Immediate(Smi::FromInt(instance_size))); | |
6085 CallRuntimeFromDeferred( | |
6086 Runtime::kAllocateInNewSpace, 1, instr, instr->context()); | |
6087 __ StoreToSafepointRegisterSlot(result, eax); | |
6088 } | |
6089 | |
6090 | |
6091 void LCodeGen::DoAllocate(LAllocate* instr) { | 6002 void LCodeGen::DoAllocate(LAllocate* instr) { |
6092 class DeferredAllocate: public LDeferredCode { | 6003 class DeferredAllocate: public LDeferredCode { |
6093 public: | 6004 public: |
6094 DeferredAllocate(LCodeGen* codegen, LAllocate* instr) | 6005 DeferredAllocate(LCodeGen* codegen, LAllocate* instr) |
6095 : LDeferredCode(codegen), instr_(instr) { } | 6006 : LDeferredCode(codegen), instr_(instr) { } |
6096 virtual void Generate() { codegen()->DoDeferredAllocate(instr_); } | 6007 virtual void Generate() { codegen()->DoDeferredAllocate(instr_); } |
6097 virtual LInstruction* instr() { return instr_; } | 6008 virtual LInstruction* instr() { return instr_; } |
6098 private: | 6009 private: |
6099 LAllocate* instr_; | 6010 LAllocate* instr_; |
6100 }; | 6011 }; |
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6601 FixedArray::kHeaderSize - kPointerSize)); | 6512 FixedArray::kHeaderSize - kPointerSize)); |
6602 __ bind(&done); | 6513 __ bind(&done); |
6603 } | 6514 } |
6604 | 6515 |
6605 | 6516 |
6606 #undef __ | 6517 #undef __ |
6607 | 6518 |
6608 } } // namespace v8::internal | 6519 } } // namespace v8::internal |
6609 | 6520 |
6610 #endif // V8_TARGET_ARCH_IA32 | 6521 #endif // V8_TARGET_ARCH_IA32 |
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