solidity/libyul/optimiser/OptimizerUtilities.cpp

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/*
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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
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/**
* Some useful snippets for the optimiser.
*/
#include <libyul/optimiser/OptimizerUtilities.h>
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#include <libyul/Dialect.h>
#include <libyul/AsmData.h>
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#include <liblangutil/Token.h>
#include <libsolutil/CommonData.h>
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#include <boost/range/algorithm_ext/erase.hpp>
using namespace std;
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using namespace solidity;
using namespace solidity::langutil;
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using namespace solidity::util;
using namespace solidity::yul;
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void yul::removeEmptyBlocks(Block& _block)
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{
auto isEmptyBlock = [](Statement const& _st) -> bool {
return holds_alternative<Block>(_st) && std::get<Block>(_st).statements.empty();
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};
boost::range::remove_erase_if(_block.statements, isEmptyBlock);
}
bool yul::isRestrictedIdentifier(Dialect const& _dialect, YulString const& _identifier)
{
return _identifier.empty() || TokenTraits::isYulKeyword(_identifier.str()) || _dialect.builtin(_identifier);
}