/*

  This file is part of solidity.

  solidity is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  solidity is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with solidity.  If not, see <http://www.gnu.org/licenses/>.

*/

// SPDX-License-Identifier: GPL-3.0

/**

 * Optimiser component that combines syntactically equivalent functions.

 */

#pragma once

#include <libyul/optimiser/ASTWalker.h>

#include <libyul/optimiser/EquivalentFunctionDetector.h>

#include <libyul/optimiser/OptimiserStep.h>

#include <libyul/ASTForward.h>

namespace solidity::yul

{

struct OptimiserStepContext;

/**

 * Optimiser component that detects syntactically equivalent functions and replaces all calls to any of them by calls

 * to one particular of them.

 *

 * Prerequisite: Disambiguator, Function Hoister

 */

class EquivalentFunctionCombiner: public ASTModifier

{

public:

  static constexpr char const* name{"EquivalentFunctionCombiner"};

  static void run(OptimiserStepContext&, Block& _ast);

  using ASTModifier::operator();

  void operator()(FunctionCall& _funCall) override;

private:

  EquivalentFunctionCombiner(std::map<YulName, FunctionDefinition const*> _duplicates): m_duplicates(std::move(_duplicates)) {}

  std::map<YulName, FunctionDefinition const*> m_duplicates;

};

}