/*

  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

/**

 * @author Alex Beregszaszi

 * Removes unused JUMPDESTs.

 */

#pragma once

#include <libevmasm/SubAssemblyID.h>

#include <vector>

#include <cstddef>

#include <set>

namespace solidity::evmasm

{

class AssemblyItem;

using AssemblyItems = std::vector<AssemblyItem>;

class JumpdestRemover

{

public:

  explicit JumpdestRemover(AssemblyItems& _items): m_items(_items) {}

  bool optimise(std::set<size_t> const& _tagsReferencedFromOutside);

  /// @returns a set of all tags from the given sub-assembly that are referenced

  /// from the given list of items.

  static std::set<size_t> referencedTags(AssemblyItems const& _items, SubAssemblyID _subId);

private:

  AssemblyItems& m_items;

};

}