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// Copyright 2014 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_SELECT_LOWERING_H_
#define V8_COMPILER_SELECT_LOWERING_H_
#include <map>
#include "src/compiler/graph-reducer.h"
#include "src/zone-allocator.h"
namespace v8 {
namespace internal {
namespace compiler {
// Forward declarations.
class CommonOperatorBuilder;
class Graph;
// Lowers Select nodes to diamonds.
class SelectLowering final : public Reducer {
public:
SelectLowering(Graph* graph, CommonOperatorBuilder* common);
~SelectLowering();
Reduction Reduce(Node* node) override;
private:
typedef std::multimap<Node*, Node*, std::less<Node*>,
zone_allocator<std::pair<Node* const, Node*>>> Merges;
bool ReachableFrom(Node* const sink, Node* const source);
CommonOperatorBuilder* common() const { return common_; }
Graph* graph() const { return graph_; }
CommonOperatorBuilder* common_;
Graph* graph_;
Merges merges_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_SELECT_LOWERING_H_
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