// Copyright (c) 2017 Pierre Moreau

//

// 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_REMOVE_DUPLICATES_PASS_H_

#define SOURCE_OPT_REMOVE_DUPLICATES_PASS_H_

#include <unordered_map>

#include <vector>

#include "source/opt/decoration_manager.h"

#include "source/opt/def_use_manager.h"

#include "source/opt/ir_context.h"

#include "source/opt/module.h"

#include "source/opt/pass.h"

namespace spvtools {

namespace opt {

using IdDecorationsList =

    std::unordered_map<uint32_t, std::vector<Instruction*>>;

// See optimizer.hpp for documentation.

class RemoveDuplicatesPass : public Pass {

 public:

  const char* name() const override { return "remove-duplicates"; }

  Status Process() override;

 private:

  // Remove duplicate extensions from the module

  //

  // Returns true if the module was modified, false otherwise.

  bool RemoveDuplicateExtensions() const;

  // Remove duplicate capabilities from the module

  //

  // Returns true if the module was modified, false otherwise.

  bool RemoveDuplicateCapabilities() const;

  // Remove duplicate extended instruction imports from the module

  //

  // Returns true if the module was modified, false otherwise.

  bool RemoveDuplicatesExtInstImports() const;

  // Remove duplicate types from the module

  //

  // Returns true if the module was modified, false otherwise.

  bool RemoveDuplicateTypes() const;

  // Remove duplicate decorations from the module

  //

  // Returns true if the module was modified, false otherwise.

  bool RemoveDuplicateDecorations() const;

};

}  // namespace opt

}  // namespace spvtools

#endif  // SOURCE_OPT_REMOVE_DUPLICATES_PASS_H_