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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_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(ElideLastAction) \
V(ChangeBytecodeAction) \
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_
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