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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_INTERPRETER_BYTECODE_DEAD_CODE_OPTIMIZER_H_
#define V8_INTERPRETER_BYTECODE_DEAD_CODE_OPTIMIZER_H_
#include "src/interpreter/bytecode-pipeline.h"
namespace v8 {
namespace internal {
namespace interpreter {
// An optimization stage for eliminating obviously dead code in bytecode
// generation.
class BytecodeDeadCodeOptimizer final : public BytecodePipelineStage,
public ZoneObject {
public:
explicit BytecodeDeadCodeOptimizer(BytecodePipelineStage* next_stage);
// BytecodePipelineStage interface.
void Write(BytecodeNode* node) override;
void WriteJump(BytecodeNode* node, BytecodeLabel* label) override;
void BindLabel(BytecodeLabel* label) override;
void BindLabel(const BytecodeLabel& target, BytecodeLabel* label) override;
Handle<BytecodeArray> ToBytecodeArray(
Isolate* isolate, int fixed_register_count, int parameter_count,
Handle<FixedArray> handler_table) override;
private:
BytecodePipelineStage* next_stage_;
bool exit_seen_in_block_;
DISALLOW_COPY_AND_ASSIGN(BytecodeDeadCodeOptimizer);
};
} // namespace interpreter
} // namespace internal
} // namespace v8
#endif // V8_INTERPRETER_BYTECODE_DEAD_CODE_OPTIMIZER_H_
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