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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-array-builder.h" | 5 #include "src/interpreter/bytecode-array-builder.h" |
| 6 | 6 |
| 7 #include "src/compiler.h" | 7 #include "src/compiler.h" |
| 8 #include "src/globals.h" | 8 #include "src/globals.h" |
| 9 #include "src/interpreter/bytecode-array-writer.h" | 9 #include "src/interpreter/bytecode-array-writer.h" |
| 10 #include "src/interpreter/bytecode-dead-code-optimizer.h" | 10 #include "src/interpreter/bytecode-dead-code-optimizer.h" |
| 11 #include "src/interpreter/bytecode-label.h" | 11 #include "src/interpreter/bytecode-label.h" |
| 12 #include "src/interpreter/bytecode-peephole-optimizer.h" | 12 #include "src/interpreter/bytecode-peephole-optimizer.h" |
| 13 #include "src/interpreter/bytecode-register-optimizer.h" | 13 #include "src/interpreter/bytecode-register-optimizer.h" |
| 14 #include "src/interpreter/interpreter-intrinsics.h" | 14 #include "src/interpreter/interpreter-intrinsics.h" |
| 15 | 15 |
| 16 namespace v8 { | 16 namespace v8 { |
| 17 namespace internal { | 17 namespace internal { |
| 18 namespace interpreter { | 18 namespace interpreter { |
| 19 | 19 |
| 20 BytecodeArrayBuilder::BytecodeArrayBuilder( | 20 BytecodeArrayBuilder::BytecodeArrayBuilder( |
| 21 Isolate* isolate, Zone* zone, int parameter_count, int context_count, | 21 Isolate* isolate, Zone* zone, int parameter_count, int context_count, |
| 22 int locals_count, FunctionLiteral* literal, | 22 int locals_count, FunctionLiteral* literal, |
| 23 SourcePositionTableBuilder::RecordingMode source_position_mode) | 23 SourcePositionTableBuilder::RecordingMode source_position_mode) |
| 24 : isolate_(isolate), | 24 : zone_(zone), |
| 25 zone_(zone), | |
| 26 bytecode_generated_(false), | 25 bytecode_generated_(false), |
| 27 constant_array_builder_(isolate, zone), | 26 constant_array_builder_(zone, isolate->factory()->the_hole_value()), |
| 28 handler_table_builder_(isolate, zone), | 27 handler_table_builder_(zone), |
| 29 return_seen_in_block_(false), | 28 return_seen_in_block_(false), |
| 30 parameter_count_(parameter_count), | 29 parameter_count_(parameter_count), |
| 31 local_register_count_(locals_count), | 30 local_register_count_(locals_count), |
| 32 context_register_count_(context_count), | 31 context_register_count_(context_count), |
| 33 temporary_allocator_(zone, fixed_register_count()), | 32 temporary_allocator_(zone, fixed_register_count()), |
| 34 bytecode_array_writer_(isolate, zone, &constant_array_builder_, | 33 bytecode_array_writer_(zone, &constant_array_builder_, |
| 35 source_position_mode), | 34 source_position_mode), |
| 36 pipeline_(&bytecode_array_writer_) { | 35 pipeline_(&bytecode_array_writer_) { |
| 37 DCHECK_GE(parameter_count_, 0); | 36 DCHECK_GE(parameter_count_, 0); |
| 38 DCHECK_GE(context_register_count_, 0); | 37 DCHECK_GE(context_register_count_, 0); |
| 39 DCHECK_GE(local_register_count_, 0); | 38 DCHECK_GE(local_register_count_, 0); |
| 40 | 39 |
| 41 if (FLAG_ignition_deadcode) { | 40 if (FLAG_ignition_deadcode) { |
| 42 pipeline_ = new (zone) BytecodeDeadCodeOptimizer(pipeline_); | 41 pipeline_ = new (zone) BytecodeDeadCodeOptimizer(pipeline_); |
| 43 } | 42 } |
| 44 | 43 |
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| 68 | 67 |
| 69 Register BytecodeArrayBuilder::Parameter(int parameter_index) const { | 68 Register BytecodeArrayBuilder::Parameter(int parameter_index) const { |
| 70 DCHECK_GE(parameter_index, 0); | 69 DCHECK_GE(parameter_index, 0); |
| 71 return Register::FromParameterIndex(parameter_index, parameter_count()); | 70 return Register::FromParameterIndex(parameter_index, parameter_count()); |
| 72 } | 71 } |
| 73 | 72 |
| 74 bool BytecodeArrayBuilder::RegisterIsParameterOrLocal(Register reg) const { | 73 bool BytecodeArrayBuilder::RegisterIsParameterOrLocal(Register reg) const { |
| 75 return reg.is_parameter() || reg.index() < locals_count(); | 74 return reg.is_parameter() || reg.index() < locals_count(); |
| 76 } | 75 } |
| 77 | 76 |
| 78 Handle<BytecodeArray> BytecodeArrayBuilder::ToBytecodeArray() { | 77 Handle<BytecodeArray> BytecodeArrayBuilder::ToBytecodeArray(Isolate* isolate) { |
| 79 DCHECK(return_seen_in_block_); | 78 DCHECK(return_seen_in_block_); |
| 80 DCHECK(!bytecode_generated_); | 79 DCHECK(!bytecode_generated_); |
| 81 bytecode_generated_ = true; | 80 bytecode_generated_ = true; |
| 82 | 81 |
| 83 Handle<FixedArray> handler_table = handler_table_builder()->ToHandlerTable(); | 82 Handle<FixedArray> handler_table = |
| 84 return pipeline_->ToBytecodeArray(fixed_register_count(), parameter_count(), | 83 handler_table_builder()->ToHandlerTable(isolate); |
| 85 handler_table); | 84 return pipeline_->ToBytecodeArray(isolate, fixed_register_count(), |
| 85 parameter_count(), handler_table); |
| 86 } | 86 } |
| 87 | 87 |
| 88 namespace { | 88 namespace { |
| 89 | 89 |
| 90 static bool ExpressionPositionIsNeeded(Bytecode bytecode) { | 90 static bool ExpressionPositionIsNeeded(Bytecode bytecode) { |
| 91 // An expression position is always needed if filtering is turned | 91 // An expression position is always needed if filtering is turned |
| 92 // off. Otherwise an expression is only needed if the bytecode has | 92 // off. Otherwise an expression is only needed if the bytecode has |
| 93 // external side effects. | 93 // external side effects. |
| 94 return !FLAG_ignition_filter_expression_positions || | 94 return !FLAG_ignition_filter_expression_positions || |
| 95 !Bytecodes::IsWithoutExternalSideEffects(bytecode); | 95 !Bytecodes::IsWithoutExternalSideEffects(bytecode); |
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| 971 return Bytecode::kTailCall; | 971 return Bytecode::kTailCall; |
| 972 default: | 972 default: |
| 973 UNREACHABLE(); | 973 UNREACHABLE(); |
| 974 } | 974 } |
| 975 return Bytecode::kIllegal; | 975 return Bytecode::kIllegal; |
| 976 } | 976 } |
| 977 | 977 |
| 978 } // namespace interpreter | 978 } // namespace interpreter |
| 979 } // namespace internal | 979 } // namespace internal |
| 980 } // namespace v8 | 980 } // namespace v8 |
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