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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 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/interpreter/bytecode-generator.h" | 5 #include "src/interpreter/bytecode-generator.h" |
6 | 6 |
7 #include "src/ast/scopes.h" | 7 #include "src/ast/scopes.h" |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/compiler.h" | 9 #include "src/compiler.h" |
10 #include "src/interpreter/bytecode-flags.h" | 10 #include "src/interpreter/bytecode-flags.h" |
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2612 ->CallRuntime(Runtime::kResolvePossiblyDirectEval, callee_for_eval, 6) | 2612 ->CallRuntime(Runtime::kResolvePossiblyDirectEval, callee_for_eval, 6) |
2613 .StoreAccumulatorInRegister(callee); | 2613 .StoreAccumulatorInRegister(callee); |
2614 } | 2614 } |
2615 | 2615 |
2616 builder()->SetExpressionPosition(expr); | 2616 builder()->SetExpressionPosition(expr); |
2617 | 2617 |
2618 int feedback_slot_index; | 2618 int feedback_slot_index; |
2619 if (expr->CallFeedbackICSlot().IsInvalid()) { | 2619 if (expr->CallFeedbackICSlot().IsInvalid()) { |
2620 DCHECK(call_type == Call::POSSIBLY_EVAL_CALL); | 2620 DCHECK(call_type == Call::POSSIBLY_EVAL_CALL); |
2621 // Valid type feedback slots can only be greater than kReservedIndexCount. | 2621 // Valid type feedback slots can only be greater than kReservedIndexCount. |
2622 // We use 0 to indicate an invalid slot it. Statically assert that 0 cannot | 2622 // We use 0 to indicate an invalid slot id. Statically assert that 0 cannot |
2623 // be a valid slot id. | 2623 // be a valid slot id. |
2624 STATIC_ASSERT(TypeFeedbackVector::kReservedIndexCount > 0); | 2624 STATIC_ASSERT(TypeFeedbackVector::kReservedIndexCount > 0); |
2625 feedback_slot_index = 0; | 2625 feedback_slot_index = 0; |
2626 } else { | 2626 } else { |
2627 feedback_slot_index = feedback_index(expr->CallFeedbackICSlot()); | 2627 feedback_slot_index = feedback_index(expr->CallFeedbackICSlot()); |
2628 } | 2628 } |
2629 builder()->Call(callee, receiver, 1 + args->length(), feedback_slot_index, | 2629 builder()->Call(callee, receiver, 1 + args->length(), feedback_slot_index, |
2630 expr->tail_call_mode()); | 2630 expr->tail_call_mode()); |
2631 execution_result()->SetResultInAccumulator(); | 2631 execution_result()->SetResultInAccumulator(); |
2632 } | 2632 } |
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2647 | 2647 |
2648 ZoneList<Expression*>* args = expr->arguments(); | 2648 ZoneList<Expression*>* args = expr->arguments(); |
2649 Register first_arg = VisitArguments(args); | 2649 Register first_arg = VisitArguments(args); |
2650 | 2650 |
2651 // The new target is loaded into the accumulator from the | 2651 // The new target is loaded into the accumulator from the |
2652 // {new.target} variable. | 2652 // {new.target} variable. |
2653 VisitForAccumulatorValue(super->new_target_var()); | 2653 VisitForAccumulatorValue(super->new_target_var()); |
2654 | 2654 |
2655 // Call construct. | 2655 // Call construct. |
2656 builder()->SetExpressionPosition(expr); | 2656 builder()->SetExpressionPosition(expr); |
2657 builder()->New(constructor, first_arg, args->length()); | 2657 // Valid type feedback slots can only be greater than kReservedIndexCount. |
| 2658 // Assert that 0 cannot be valid a valid slot id. |
| 2659 STATIC_ASSERT(TypeFeedbackVector::kReservedIndexCount > 0); |
| 2660 // Type feedback is not necessary for super constructor calls. The type |
| 2661 // information can be inferred in most cases. Slot id 0 indicates type |
| 2662 // feedback is not required. |
| 2663 builder()->New(constructor, first_arg, args->length(), 0); |
2658 execution_result()->SetResultInAccumulator(); | 2664 execution_result()->SetResultInAccumulator(); |
2659 } | 2665 } |
2660 | 2666 |
2661 void BytecodeGenerator::VisitCallNew(CallNew* expr) { | 2667 void BytecodeGenerator::VisitCallNew(CallNew* expr) { |
2662 Register constructor = register_allocator()->NewRegister(); | 2668 Register constructor = register_allocator()->NewRegister(); |
2663 VisitForAccumulatorValue(expr->expression()); | 2669 VisitForAccumulatorValue(expr->expression()); |
2664 builder()->StoreAccumulatorInRegister(constructor); | 2670 builder()->StoreAccumulatorInRegister(constructor); |
2665 | 2671 |
2666 ZoneList<Expression*>* args = expr->arguments(); | 2672 ZoneList<Expression*>* args = expr->arguments(); |
2667 Register first_arg = VisitArguments(args); | 2673 Register first_arg = VisitArguments(args); |
2668 | 2674 |
2669 builder()->SetExpressionPosition(expr); | 2675 builder()->SetExpressionPosition(expr); |
2670 // The accumulator holds new target which is the same as the | 2676 // The accumulator holds new target which is the same as the |
2671 // constructor for CallNew. | 2677 // constructor for CallNew. |
2672 builder() | 2678 builder() |
2673 ->LoadAccumulatorWithRegister(constructor) | 2679 ->LoadAccumulatorWithRegister(constructor) |
2674 .New(constructor, first_arg, args->length()); | 2680 .New(constructor, first_arg, args->length(), |
| 2681 feedback_index(expr->CallNewFeedbackSlot())); |
2675 execution_result()->SetResultInAccumulator(); | 2682 execution_result()->SetResultInAccumulator(); |
2676 } | 2683 } |
2677 | 2684 |
2678 void BytecodeGenerator::VisitCallRuntime(CallRuntime* expr) { | 2685 void BytecodeGenerator::VisitCallRuntime(CallRuntime* expr) { |
2679 ZoneList<Expression*>* args = expr->arguments(); | 2686 ZoneList<Expression*>* args = expr->arguments(); |
2680 if (expr->is_jsruntime()) { | 2687 if (expr->is_jsruntime()) { |
2681 // Allocate a register for the receiver and load it with undefined. | 2688 // Allocate a register for the receiver and load it with undefined. |
2682 register_allocator()->PrepareForConsecutiveAllocations(1 + args->length()); | 2689 register_allocator()->PrepareForConsecutiveAllocations(1 + args->length()); |
2683 Register receiver = register_allocator()->NextConsecutiveRegister(); | 2690 Register receiver = register_allocator()->NextConsecutiveRegister(); |
2684 builder()->LoadUndefined().StoreAccumulatorInRegister(receiver); | 2691 builder()->LoadUndefined().StoreAccumulatorInRegister(receiver); |
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3271 return execution_context()->scope()->language_mode(); | 3278 return execution_context()->scope()->language_mode(); |
3272 } | 3279 } |
3273 | 3280 |
3274 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const { | 3281 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const { |
3275 return TypeFeedbackVector::GetIndex(slot); | 3282 return TypeFeedbackVector::GetIndex(slot); |
3276 } | 3283 } |
3277 | 3284 |
3278 } // namespace interpreter | 3285 } // namespace interpreter |
3279 } // namespace internal | 3286 } // namespace internal |
3280 } // namespace v8 | 3287 } // namespace v8 |
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