chromium/v8/src/compiler/turboshaft/select-lowering-reducer.h

// Copyright 2022 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_COMPILER_TURBOSHAFT_SELECT_LOWERING_REDUCER_H_
#define V8_COMPILER_TURBOSHAFT_SELECT_LOWERING_REDUCER_H_

#include "src/base/vector.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/turboshaft/assembler.h"
#include "src/compiler/turboshaft/operations.h"

namespace v8::internal::compiler::turboshaft {

#include "src/compiler/turboshaft/define-assembler-macros.inc"

// Lowers Select operations to diamonds.
//
// A Select is conceptually somewhat similar to a ternary if:
//
//       res = Select(cond, val_true, val_false)
//
// means:
//
//       res = cond ? val_true : val_false
//
// SelectLoweringReducer lowers such operations into:
//
//     if (cond) {
//         res = val_true
//     } else {
//         res = val_false
//     }

template <class Next>
class SelectLoweringReducer : public Next { … };

#include "src/compiler/turboshaft/undef-assembler-macros.inc"

}  // namespace v8::internal::compiler::turboshaft

#endif  // V8_COMPILER_TURBOSHAFT_SELECT_LOWERING_REDUCER_H_