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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/compiler.h" | 8 #include "src/compiler.h" |
9 #include "src/interpreter/bytecode-register-allocator.h" | 9 #include "src/interpreter/bytecode-register-allocator.h" |
10 #include "src/interpreter/control-flow-builders.h" | 10 #include "src/interpreter/control-flow-builders.h" |
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2400 // Deleting local var/let/const, context variables, and arguments | 2400 // Deleting local var/let/const, context variables, and arguments |
2401 // does not have any effect. | 2401 // does not have any effect. |
2402 if (variable->HasThisName(isolate())) { | 2402 if (variable->HasThisName(isolate())) { |
2403 builder()->LoadTrue(); | 2403 builder()->LoadTrue(); |
2404 } else { | 2404 } else { |
2405 builder()->LoadFalse(); | 2405 builder()->LoadFalse(); |
2406 } | 2406 } |
2407 break; | 2407 break; |
2408 } | 2408 } |
2409 case VariableLocation::LOOKUP: { | 2409 case VariableLocation::LOOKUP: { |
2410 builder()->LoadLiteral(variable->name()).DeleteLookupSlot(); | 2410 Register name_reg = register_allocator()->NewRegister(); |
| 2411 builder() |
| 2412 ->LoadLiteral(variable->name()) |
| 2413 .StoreAccumulatorInRegister(name_reg) |
| 2414 .CallRuntime(Runtime::kDeleteLookupSlot, name_reg, 1); |
2411 break; | 2415 break; |
2412 } | 2416 } |
2413 default: | 2417 default: |
2414 UNREACHABLE(); | 2418 UNREACHABLE(); |
2415 } | 2419 } |
2416 } else { | 2420 } else { |
2417 // Delete of an unresolvable reference returns true. | 2421 // Delete of an unresolvable reference returns true. |
2418 VisitForEffect(expr->expression()); | 2422 VisitForEffect(expr->expression()); |
2419 builder()->LoadTrue(); | 2423 builder()->LoadTrue(); |
2420 } | 2424 } |
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2871 } | 2875 } |
2872 | 2876 |
2873 | 2877 |
2874 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const { | 2878 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const { |
2875 return info()->feedback_vector()->GetIndex(slot); | 2879 return info()->feedback_vector()->GetIndex(slot); |
2876 } | 2880 } |
2877 | 2881 |
2878 } // namespace interpreter | 2882 } // namespace interpreter |
2879 } // namespace internal | 2883 } // namespace internal |
2880 } // namespace v8 | 2884 } // namespace v8 |
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