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// Copyright 2015 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_FEEDBACK_LOWERING_H_
#define V8_COMPILER_JS_TYPE_FEEDBACK_LOWERING_H_
#include "src/base/flags.h"
#include "src/compiler/graph-reducer.h"
#include "src/compiler/simplified-operator.h"
namespace v8 {
namespace internal {
// Forward declarations.
class Factory;
namespace compiler {
// Forward declarations.
class CommonOperatorBuilder;
class JSGraph;
class MachineOperatorBuilder;
// Lowers JS-level operators to simplified operators based on type feedback.
class JSTypeFeedbackLowering final : public AdvancedReducer {
public:
// Various configuration flags to control the operation of this lowering.
enum Flag {
kNoFlags = 0,
kDeoptimizationEnabled = 1 << 0,
};
typedef base::Flags<Flag> Flags;
JSTypeFeedbackLowering(Editor* editor, Flags flags, JSGraph* jsgraph);
~JSTypeFeedbackLowering() final {}
Reduction Reduce(Node* node) final;
private:
Reduction ReduceJSLoadNamed(Node* node);
Factory* factory() const;
Flags flags() const { return flags_; }
Graph* graph() const;
Isolate* isolate() const;
JSGraph* jsgraph() const { return jsgraph_; }
CommonOperatorBuilder* common() const;
MachineOperatorBuilder* machine() const;
SimplifiedOperatorBuilder* simplified() { return &simplified_; }
Flags const flags_;
JSGraph* const jsgraph_;
SimplifiedOperatorBuilder simplified_;
DISALLOW_COPY_AND_ASSIGN(JSTypeFeedbackLowering);
};
DEFINE_OPERATORS_FOR_FLAGS(JSTypeFeedbackLowering::Flags)
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_JS_TYPE_FEEDBACK_LOWERING_H_
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