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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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| 5132 } else { | 5132 } else { |
| 5133 for (int i = 0; i < prototypes->length(); i++) { | 5133 for (int i = 0; i < prototypes->length(); i++) { |
| 5134 __ LoadHeapObject(prototype_reg, prototypes->at(i)); | 5134 __ LoadHeapObject(prototype_reg, prototypes->at(i)); |
| 5135 __ lw(map_reg, FieldMemOperand(prototype_reg, HeapObject::kMapOffset)); | 5135 __ lw(map_reg, FieldMemOperand(prototype_reg, HeapObject::kMapOffset)); |
| 5136 DoCheckMapCommon(map_reg, maps->at(i), instr->environment()); | 5136 DoCheckMapCommon(map_reg, maps->at(i), instr->environment()); |
| 5137 } | 5137 } |
| 5138 } | 5138 } |
| 5139 } | 5139 } |
| 5140 | 5140 |
| 5141 | 5141 |
| 5142 void LCodeGen::DoAllocateObject(LAllocateObject* instr) { | |
| 5143 class DeferredAllocateObject: public LDeferredCode { | |
| 5144 public: | |
| 5145 DeferredAllocateObject(LCodeGen* codegen, LAllocateObject* instr) | |
| 5146 : LDeferredCode(codegen), instr_(instr) { } | |
| 5147 virtual void Generate() { codegen()->DoDeferredAllocateObject(instr_); } | |
| 5148 virtual LInstruction* instr() { return instr_; } | |
| 5149 private: | |
| 5150 LAllocateObject* instr_; | |
| 5151 }; | |
| 5152 | |
| 5153 DeferredAllocateObject* deferred = | |
| 5154 new(zone()) DeferredAllocateObject(this, instr); | |
| 5155 | |
| 5156 Register result = ToRegister(instr->result()); | |
| 5157 Register scratch = ToRegister(instr->temp()); | |
| 5158 Register scratch2 = ToRegister(instr->temp2()); | |
| 5159 Handle<JSFunction> constructor = instr->hydrogen()->constructor(); | |
| 5160 Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map(); | |
| 5161 int instance_size = initial_map->instance_size(); | |
| 5162 ASSERT(initial_map->pre_allocated_property_fields() + | |
| 5163 initial_map->unused_property_fields() - | |
| 5164 initial_map->inobject_properties() == 0); | |
| 5165 | |
| 5166 __ Allocate(instance_size, result, scratch, scratch2, deferred->entry(), | |
| 5167 TAG_OBJECT); | |
| 5168 | |
| 5169 __ bind(deferred->exit()); | |
| 5170 if (FLAG_debug_code) { | |
| 5171 Label is_in_new_space; | |
| 5172 __ JumpIfInNewSpace(result, scratch, &is_in_new_space); | |
| 5173 __ Abort("Allocated object is not in new-space"); | |
| 5174 __ bind(&is_in_new_space); | |
| 5175 } | |
| 5176 | |
| 5177 // Load the initial map. | |
| 5178 Register map = scratch; | |
| 5179 __ LoadHeapObject(map, constructor); | |
| 5180 __ lw(map, FieldMemOperand(map, JSFunction::kPrototypeOrInitialMapOffset)); | |
| 5181 | |
| 5182 // Initialize map and fields of the newly allocated object. | |
| 5183 ASSERT(initial_map->instance_type() == JS_OBJECT_TYPE); | |
| 5184 __ sw(map, FieldMemOperand(result, JSObject::kMapOffset)); | |
| 5185 __ LoadRoot(scratch, Heap::kEmptyFixedArrayRootIndex); | |
| 5186 __ sw(scratch, FieldMemOperand(result, JSObject::kElementsOffset)); | |
| 5187 __ sw(scratch, FieldMemOperand(result, JSObject::kPropertiesOffset)); | |
| 5188 if (initial_map->inobject_properties() != 0) { | |
| 5189 __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); | |
| 5190 for (int i = 0; i < initial_map->inobject_properties(); i++) { | |
| 5191 int property_offset = JSObject::kHeaderSize + i * kPointerSize; | |
| 5192 __ sw(scratch, FieldMemOperand(result, property_offset)); | |
| 5193 } | |
| 5194 } | |
| 5195 } | |
| 5196 | |
| 5197 | |
| 5198 void LCodeGen::DoDeferredAllocateObject(LAllocateObject* instr) { | |
| 5199 Register result = ToRegister(instr->result()); | |
| 5200 Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map(); | |
| 5201 int instance_size = initial_map->instance_size(); | |
| 5202 | |
| 5203 // TODO(3095996): Get rid of this. For now, we need to make the | |
| 5204 // result register contain a valid pointer because it is already | |
| 5205 // contained in the register pointer map. | |
| 5206 __ mov(result, zero_reg); | |
| 5207 | |
| 5208 PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); | |
| 5209 __ li(a0, Operand(Smi::FromInt(instance_size))); | |
| 5210 __ push(a0); | |
| 5211 CallRuntimeFromDeferred(Runtime::kAllocateInNewSpace, 1, instr); | |
| 5212 __ StoreToSafepointRegisterSlot(v0, result); | |
| 5213 } | |
| 5214 | |
| 5215 | |
| 5216 void LCodeGen::DoAllocate(LAllocate* instr) { | 5142 void LCodeGen::DoAllocate(LAllocate* instr) { |
| 5217 class DeferredAllocate: public LDeferredCode { | 5143 class DeferredAllocate: public LDeferredCode { |
| 5218 public: | 5144 public: |
| 5219 DeferredAllocate(LCodeGen* codegen, LAllocate* instr) | 5145 DeferredAllocate(LCodeGen* codegen, LAllocate* instr) |
| 5220 : LDeferredCode(codegen), instr_(instr) { } | 5146 : LDeferredCode(codegen), instr_(instr) { } |
| 5221 virtual void Generate() { codegen()->DoDeferredAllocate(instr_); } | 5147 virtual void Generate() { codegen()->DoDeferredAllocate(instr_); } |
| 5222 virtual LInstruction* instr() { return instr_; } | 5148 virtual LInstruction* instr() { return instr_; } |
| 5223 private: | 5149 private: |
| 5224 LAllocate* instr_; | 5150 LAllocate* instr_; |
| 5225 }; | 5151 }; |
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| 5768 __ Subu(scratch, result, scratch); | 5694 __ Subu(scratch, result, scratch); |
| 5769 __ lw(result, FieldMemOperand(scratch, | 5695 __ lw(result, FieldMemOperand(scratch, |
| 5770 FixedArray::kHeaderSize - kPointerSize)); | 5696 FixedArray::kHeaderSize - kPointerSize)); |
| 5771 __ bind(&done); | 5697 __ bind(&done); |
| 5772 } | 5698 } |
| 5773 | 5699 |
| 5774 | 5700 |
| 5775 #undef __ | 5701 #undef __ |
| 5776 | 5702 |
| 5777 } } // namespace v8::internal | 5703 } } // namespace v8::internal |
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