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Issue 1199983002: [strong] Implement strong property access semantics (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: add TODOs Created 5 years, 5 months ago
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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 // 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_IA32 7 #if V8_TARGET_ARCH_IA32
8 8
9 #include "src/base/bits.h" 9 #include "src/base/bits.h"
10 #include "src/bootstrapper.h" 10 #include "src/bootstrapper.h"
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4421 4421
4422 void LoadICTrampolineStub::Generate(MacroAssembler* masm) { 4422 void LoadICTrampolineStub::Generate(MacroAssembler* masm) {
4423 EmitLoadTypeFeedbackVector(masm, LoadWithVectorDescriptor::VectorRegister()); 4423 EmitLoadTypeFeedbackVector(masm, LoadWithVectorDescriptor::VectorRegister());
4424 LoadICStub stub(isolate(), state()); 4424 LoadICStub stub(isolate(), state());
4425 stub.GenerateForTrampoline(masm); 4425 stub.GenerateForTrampoline(masm);
4426 } 4426 }
4427 4427
4428 4428
4429 void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) { 4429 void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) {
4430 EmitLoadTypeFeedbackVector(masm, LoadWithVectorDescriptor::VectorRegister()); 4430 EmitLoadTypeFeedbackVector(masm, LoadWithVectorDescriptor::VectorRegister());
4431 KeyedLoadICStub stub(isolate()); 4431 KeyedLoadICStub stub(isolate(), state());
4432 stub.GenerateForTrampoline(masm); 4432 stub.GenerateForTrampoline(masm);
4433 } 4433 }
4434 4434
4435 4435
4436 static void HandleArrayCases(MacroAssembler* masm, Register receiver, 4436 static void HandleArrayCases(MacroAssembler* masm, Register receiver,
4437 Register key, Register vector, Register slot, 4437 Register key, Register vector, Register slot,
4438 Register feedback, bool is_polymorphic, 4438 Register feedback, bool is_polymorphic,
4439 Label* miss) { 4439 Label* miss) {
4440 // feedback initially contains the feedback array 4440 // feedback initially contains the feedback array
4441 Label next, next_loop, prepare_next; 4441 Label next, next_loop, prepare_next;
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4625 // We have a polymorphic element handler. 4625 // We have a polymorphic element handler.
4626 Label polymorphic, try_poly_name; 4626 Label polymorphic, try_poly_name;
4627 __ bind(&polymorphic); 4627 __ bind(&polymorphic);
4628 HandleArrayCases(masm, receiver, key, vector, slot, feedback, true, &miss); 4628 HandleArrayCases(masm, receiver, key, vector, slot, feedback, true, &miss);
4629 4629
4630 __ bind(&not_array); 4630 __ bind(&not_array);
4631 // Is it generic? 4631 // Is it generic?
4632 __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); 4632 __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex);
4633 __ j(not_equal, &try_poly_name); 4633 __ j(not_equal, &try_poly_name);
4634 Handle<Code> megamorphic_stub = 4634 Handle<Code> megamorphic_stub =
4635 KeyedLoadIC::ChooseMegamorphicStub(masm->isolate()); 4635 KeyedLoadIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState());
4636 __ jmp(megamorphic_stub, RelocInfo::CODE_TARGET); 4636 __ jmp(megamorphic_stub, RelocInfo::CODE_TARGET);
4637 4637
4638 __ bind(&try_poly_name); 4638 __ bind(&try_poly_name);
4639 // We might have a name in feedback, and a fixed array in the next slot. 4639 // We might have a name in feedback, and a fixed array in the next slot.
4640 __ cmp(key, feedback); 4640 __ cmp(key, feedback);
4641 __ j(not_equal, &miss); 4641 __ j(not_equal, &miss);
4642 // If the name comparison succeeded, we know we have a fixed array with 4642 // If the name comparison succeeded, we know we have a fixed array with
4643 // at least one map/handler pair. 4643 // at least one map/handler pair.
4644 __ mov(feedback, FieldOperand(vector, slot, times_half_pointer_size, 4644 __ mov(feedback, FieldOperand(vector, slot, times_half_pointer_size,
4645 FixedArray::kHeaderSize + kPointerSize)); 4645 FixedArray::kHeaderSize + kPointerSize));
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5476 Operand(ebp, 7 * kPointerSize), NULL); 5476 Operand(ebp, 7 * kPointerSize), NULL);
5477 } 5477 }
5478 5478
5479 5479
5480 #undef __ 5480 #undef __
5481 5481
5482 } // namespace internal 5482 } // namespace internal
5483 } // namespace v8 5483 } // namespace v8
5484 5484
5485 #endif // V8_TARGET_ARCH_IA32 5485 #endif // V8_TARGET_ARCH_IA32
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