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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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5404 } else { | 5404 } else { |
5405 for (int i = 0; i < prototypes->length(); i++) { | 5405 for (int i = 0; i < prototypes->length(); i++) { |
5406 __ LoadHeapObject(prototype_reg, prototypes->at(i)); | 5406 __ LoadHeapObject(prototype_reg, prototypes->at(i)); |
5407 __ ldr(map_reg, FieldMemOperand(prototype_reg, HeapObject::kMapOffset)); | 5407 __ ldr(map_reg, FieldMemOperand(prototype_reg, HeapObject::kMapOffset)); |
5408 DoCheckMapCommon(map_reg, maps->at(i), instr->environment()); | 5408 DoCheckMapCommon(map_reg, maps->at(i), instr->environment()); |
5409 } | 5409 } |
5410 } | 5410 } |
5411 } | 5411 } |
5412 | 5412 |
5413 | 5413 |
5414 void LCodeGen::DoAllocateObject(LAllocateObject* instr) { | |
5415 class DeferredAllocateObject: public LDeferredCode { | |
5416 public: | |
5417 DeferredAllocateObject(LCodeGen* codegen, LAllocateObject* instr) | |
5418 : LDeferredCode(codegen), instr_(instr) { } | |
5419 virtual void Generate() { codegen()->DoDeferredAllocateObject(instr_); } | |
5420 virtual LInstruction* instr() { return instr_; } | |
5421 private: | |
5422 LAllocateObject* instr_; | |
5423 }; | |
5424 | |
5425 DeferredAllocateObject* deferred = | |
5426 new(zone()) DeferredAllocateObject(this, instr); | |
5427 | |
5428 Register result = ToRegister(instr->result()); | |
5429 Register scratch = ToRegister(instr->temp()); | |
5430 Register scratch2 = ToRegister(instr->temp2()); | |
5431 Handle<JSFunction> constructor = instr->hydrogen()->constructor(); | |
5432 Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map(); | |
5433 int instance_size = initial_map->instance_size(); | |
5434 ASSERT(initial_map->pre_allocated_property_fields() + | |
5435 initial_map->unused_property_fields() - | |
5436 initial_map->inobject_properties() == 0); | |
5437 | |
5438 __ Allocate(instance_size, result, scratch, scratch2, deferred->entry(), | |
5439 TAG_OBJECT); | |
5440 | |
5441 __ bind(deferred->exit()); | |
5442 if (FLAG_debug_code) { | |
5443 Label is_in_new_space; | |
5444 __ JumpIfInNewSpace(result, scratch, &is_in_new_space); | |
5445 __ Abort("Allocated object is not in new-space"); | |
5446 __ bind(&is_in_new_space); | |
5447 } | |
5448 | |
5449 // Load the initial map. | |
5450 Register map = scratch; | |
5451 __ LoadHeapObject(map, constructor); | |
5452 __ ldr(map, FieldMemOperand(map, JSFunction::kPrototypeOrInitialMapOffset)); | |
5453 | |
5454 // Initialize map and fields of the newly allocated object. | |
5455 ASSERT(initial_map->instance_type() == JS_OBJECT_TYPE); | |
5456 __ str(map, FieldMemOperand(result, JSObject::kMapOffset)); | |
5457 __ LoadRoot(scratch, Heap::kEmptyFixedArrayRootIndex); | |
5458 __ str(scratch, FieldMemOperand(result, JSObject::kElementsOffset)); | |
5459 __ str(scratch, FieldMemOperand(result, JSObject::kPropertiesOffset)); | |
5460 if (initial_map->inobject_properties() != 0) { | |
5461 __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); | |
5462 for (int i = 0; i < initial_map->inobject_properties(); i++) { | |
5463 int property_offset = JSObject::kHeaderSize + i * kPointerSize; | |
5464 __ str(scratch, FieldMemOperand(result, property_offset)); | |
5465 } | |
5466 } | |
5467 } | |
5468 | |
5469 | |
5470 void LCodeGen::DoDeferredAllocateObject(LAllocateObject* instr) { | |
5471 Register result = ToRegister(instr->result()); | |
5472 Handle<Map> initial_map = instr->hydrogen()->constructor_initial_map(); | |
5473 int instance_size = initial_map->instance_size(); | |
5474 | |
5475 // TODO(3095996): Get rid of this. For now, we need to make the | |
5476 // result register contain a valid pointer because it is already | |
5477 // contained in the register pointer map. | |
5478 __ mov(result, Operand::Zero()); | |
5479 | |
5480 PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters); | |
5481 __ mov(r0, Operand(Smi::FromInt(instance_size))); | |
5482 __ push(r0); | |
5483 CallRuntimeFromDeferred(Runtime::kAllocateInNewSpace, 1, instr); | |
5484 __ StoreToSafepointRegisterSlot(r0, result); | |
5485 } | |
5486 | |
5487 | |
5488 void LCodeGen::DoAllocate(LAllocate* instr) { | 5414 void LCodeGen::DoAllocate(LAllocate* instr) { |
5489 class DeferredAllocate: public LDeferredCode { | 5415 class DeferredAllocate: public LDeferredCode { |
5490 public: | 5416 public: |
5491 DeferredAllocate(LCodeGen* codegen, LAllocate* instr) | 5417 DeferredAllocate(LCodeGen* codegen, LAllocate* instr) |
5492 : LDeferredCode(codegen), instr_(instr) { } | 5418 : LDeferredCode(codegen), instr_(instr) { } |
5493 virtual void Generate() { codegen()->DoDeferredAllocate(instr_); } | 5419 virtual void Generate() { codegen()->DoDeferredAllocate(instr_); } |
5494 virtual LInstruction* instr() { return instr_; } | 5420 virtual LInstruction* instr() { return instr_; } |
5495 private: | 5421 private: |
5496 LAllocate* instr_; | 5422 LAllocate* instr_; |
5497 }; | 5423 }; |
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6000 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); | 5926 __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index)); |
6001 __ ldr(result, FieldMemOperand(scratch, | 5927 __ ldr(result, FieldMemOperand(scratch, |
6002 FixedArray::kHeaderSize - kPointerSize)); | 5928 FixedArray::kHeaderSize - kPointerSize)); |
6003 __ bind(&done); | 5929 __ bind(&done); |
6004 } | 5930 } |
6005 | 5931 |
6006 | 5932 |
6007 #undef __ | 5933 #undef __ |
6008 | 5934 |
6009 } } // namespace v8::internal | 5935 } } // namespace v8::internal |
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