1 // Copyright 2016 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_INTERPRETER_BYTECODE_DEAD_CODE_OPTIMIZER_H_ 6 #define V8_INTERPRETER_BYTECODE_DEAD_CODE_OPTIMIZER_H_ 7 8 #include "src/base/compiler-specific.h" 9 #include "src/globals.h" 10 #include "src/interpreter/bytecode-pipeline.h" 11 12 namespace v8 { 13 namespace internal { 14 namespace interpreter { 15 16 // An optimization stage for eliminating obviously dead code in bytecode 17 // generation. 18 class V8_EXPORT_PRIVATE BytecodeDeadCodeOptimizer final NON_EXPORTED_BASE(BytecodePipelineStage)19 : public NON_EXPORTED_BASE(BytecodePipelineStage), 20 public NON_EXPORTED_BASE(ZoneObject) { 21 public: 22 explicit BytecodeDeadCodeOptimizer(BytecodePipelineStage* next_stage); 23 24 // BytecodePipelineStage interface. 25 void Write(BytecodeNode* node) override; 26 void WriteJump(BytecodeNode* node, BytecodeLabel* label) override; 27 void BindLabel(BytecodeLabel* label) override; 28 void BindLabel(const BytecodeLabel& target, BytecodeLabel* label) override; 29 Handle<BytecodeArray> ToBytecodeArray( 30 Isolate* isolate, int register_count, int parameter_count, 31 Handle<FixedArray> handler_table) override; 32 33 private: 34 BytecodePipelineStage* next_stage_; 35 bool exit_seen_in_block_; 36 37 DISALLOW_COPY_AND_ASSIGN(BytecodeDeadCodeOptimizer); 38 }; 39 40 } // namespace interpreter 41 } // namespace internal 42 } // namespace v8 43 44 #endif // V8_INTERPRETER_BYTECODE_DEAD_CODE_OPTIMIZER_H_ 45