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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_COMPILER_BACKEND_BITCAST_ELIDER_H_
#define V8_COMPILER_BACKEND_BITCAST_ELIDER_H_
#include "src/compiler/node-marker.h"
#include "src/compiler/node.h"
#include "src/zone/zone.h"
namespace v8 {
namespace internal {
namespace compiler {
class Graph;
// Elide all the Bitcast and TruncateInt64ToInt32 nodes which are required by
// MachineGraphVerifier. This avoid generating redundant move instructions in
// instruction selection phase.
class BitcastElider {
public:
BitcastElider(Zone* zone, Graph* graph, bool is_builtin);
~BitcastElider() = default;
void Reduce();
void Enqueue(Node* node);
void Revisit(Node* node);
void VisitNode(Node* node);
void ProcessGraph();
private:
Graph* const graph_;
ZoneQueue<Node*> to_visit_;
NodeMarker<bool> seen_;
bool is_builtin_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_BACKEND_BITCAST_ELIDER_H_
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