| // 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_PEEPHOLE_TABLE_H_ |
| #define V8_INTERPRETER_BYTECODE_PEEPHOLE_TABLE_H_ |
| |
| #include "src/interpreter/bytecodes.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace interpreter { |
| |
| #define PEEPHOLE_NON_JUMP_ACTION_LIST(V) \ |
| V(DefaultAction) \ |
| V(UpdateLastAction) \ |
| V(UpdateLastIfSourceInfoPresentAction) \ |
| V(ElideCurrentAction) \ |
| V(ElideCurrentIfOperand0MatchesAction) \ |
| V(ElideCurrentIfLoadingNameConstantAction) \ |
| V(ElideLastAction) \ |
| V(ChangeBytecodeAction) \ |
| V(TransformLdaStarToLdrLdarAction) \ |
| V(TransformLdaSmiBinaryOpToBinaryOpWithSmiAction) \ |
| V(TransformLdaZeroBinaryOpToBinaryOpWithZeroAction) |
| |
| #define PEEPHOLE_JUMP_ACTION_LIST(V) \ |
| V(DefaultJumpAction) \ |
| V(UpdateLastJumpAction) \ |
| V(ChangeJumpBytecodeAction) \ |
| V(ElideLastBeforeJumpAction) |
| |
| #define PEEPHOLE_ACTION_LIST(V) \ |
| PEEPHOLE_NON_JUMP_ACTION_LIST(V) \ |
| PEEPHOLE_JUMP_ACTION_LIST(V) |
| |
| // Actions to take when a pair of bytes is encountered. A handler |
| // exists for each action. |
| enum class PeepholeAction : uint8_t { |
| #define DECLARE_PEEPHOLE_ACTION(Action) k##Action, |
| PEEPHOLE_ACTION_LIST(DECLARE_PEEPHOLE_ACTION) |
| #undef DECLARE_PEEPHOLE_ACTION |
| }; |
| |
| // Tuple of action to take when pair of bytecodes is encountered and |
| // optional data to invoke handler with. |
| struct PeepholeActionAndData final { |
| // Action to take when tuple of bytecodes encountered. |
| PeepholeAction action; |
| |
| // Replacement bytecode (if valid). |
| Bytecode bytecode; |
| }; |
| |
| // Lookup table for matching pairs of bytecodes to peephole optimization |
| // actions. The contents of the table are generated by mkpeephole.cc. |
| struct PeepholeActionTable final { |
| public: |
| static const PeepholeActionAndData* Lookup(Bytecode last, Bytecode current); |
| |
| private: |
| static const size_t kNumberOfBytecodes = |
| static_cast<size_t>(Bytecode::kLast) + 1; |
| |
| static const PeepholeActionAndData row_data_[][kNumberOfBytecodes]; |
| static const PeepholeActionAndData* const row_[kNumberOfBytecodes]; |
| }; |
| |
| } // namespace interpreter |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_INTERPRETER_BYTECODE_PEEPHOLE_TABLE_H_ |