// Copyright (c) 2018 Google LLC.

//

// 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.

#ifndef SOURCE_OPT_LOOP_UNROLLER_H_

#define SOURCE_OPT_LOOP_UNROLLER_H_

#include "source/opt/pass.h"

namespace spvtools {

namespace opt {

class LoopUnroller : public Pass {

 public:

  LoopUnroller() : Pass(), fully_unroll_(true), unroll_factor_(0) {}

  LoopUnroller(bool fully_unroll, int unroll_factor)

      : Pass(), fully_unroll_(fully_unroll), unroll_factor_(unroll_factor) {}

  const char* name() const override { return "loop-unroll"; }

  Status Process() override;

  IRContext::Analysis GetPreservedAnalyses() override {

    return IRContext::kAnalysisDefUse |

           IRContext::kAnalysisInstrToBlockMapping |

           IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |

           IRContext::kAnalysisNameMap | IRContext::kAnalysisConstants |

           IRContext::kAnalysisTypes;

  }

 private:

  bool fully_unroll_;

  int unroll_factor_;

};

}  // namespace opt

}  // namespace spvtools

#endif  // SOURCE_OPT_LOOP_UNROLLER_H_