/*

  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.

 */

#include <libyul/optimiser/EquivalentFunctionDetector.h>

#include <libyul/optimiser/SyntacticalEquality.h>

#include <libyul/AST.h>

#include <libyul/optimiser/Metrics.h>

using namespace solidity;

using namespace solidity::yul;

void EquivalentFunctionDetector::operator()(FunctionDefinition const& _fun)

{

  uint64_t bodyHash = m_blockHashes[&_fun.body];

  auto& candidates = m_candidates[bodyHash];

  for (auto const& candidate: candidates)

    if (SyntacticallyEqual{}.statementEqual(_fun, *candidate))

    {

      m_duplicates[_fun.name] = candidate;

      return;

    }

  candidates.push_back(&_fun);

}