// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once
#include <memory>

#include "paddle/fluid/framework/ir/fuse_pass_base.h"

namespace paddle {
namespace framework {
namespace ir {

// There may be many transpose-flatten structures in a model, and the output of
// these structures will be used as inputs to the concat Op. This pattern will
// be detected by our pass. The times here represents the repeat times of this
// structure.
class TransposeFlattenConcatFusePass : public FusePassBase {
 public:
  TransposeFlattenConcatFusePass();
  virtual ~TransposeFlattenConcatFusePass() {}

 protected:
  void ApplyImpl(ir::Graph* graph) const override;

 private:
  void RunTransposeFlattenConcatFuse(ir::Graph* graph, int times) const;
};

}  // namespace ir
}  // namespace framework
}  // namespace paddle
