chromium/v8/src/compiler/js-type-hint-lowering.h

// Copyright 2017 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_JS_TYPE_HINT_LOWERING_H_
#define V8_COMPILER_JS_TYPE_HINT_LOWERING_H_

#include "src/base/flags.h"
#include "src/compiler/graph-reducer.h"
#include "src/deoptimizer/deoptimize-reason.h"

namespace v8 {
namespace internal {

// Forward declarations.
class FeedbackSlot;

namespace compiler {

// Forward declarations.
class JSGraph;
class Node;
class Operator;

// The type-hint lowering consumes feedback about high-level operations in order
// to potentially emit nodes using speculative simplified operators in favor of
// the generic JavaScript operators.
//
// This lowering is implemented as an early reduction and can be applied before
// nodes are placed into the initial graph. It provides the ability to shortcut
// the JavaScript-level operators and directly emit simplified-level operators
// even during initial graph building. This is the reason this lowering doesn't
// follow the interface of the reducer framework used after graph construction.
// The result of the lowering is encapsulated in
// {the JSTypeHintLowering::LoweringResult} class.
class JSTypeHintLowering { … };

}  // namespace compiler
}  // namespace internal
}  // namespace v8

#endif  // V8_COMPILER_JS_TYPE_HINT_LOWERING_H_