mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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/**
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* Optimiser component that changes the code of a block so that all non-function definition
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* statements are moved to a block of their own followed by all function definitions.
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*/
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#include <libyul/optimiser/FunctionGrouper.h>
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#include <libyul/AST.h>
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#include <boost/range/algorithm_ext/erase.hpp>
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using namespace std;
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using namespace solidity;
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using namespace solidity::yul;
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void FunctionGrouper::operator()(Block& _block)
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{
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if (alreadyGrouped(_block))
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return;
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vector<Statement> reordered;
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reordered.emplace_back(Block{_block.location, {}});
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for (auto&& statement: _block.statements)
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{
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if (holds_alternative<FunctionDefinition>(statement))
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reordered.emplace_back(std::move(statement));
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else
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std::get<Block>(reordered.front()).statements.emplace_back(std::move(statement));
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}
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_block.statements = std::move(reordered);
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}
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bool FunctionGrouper::alreadyGrouped(Block const& _block)
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{
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if (_block.statements.empty())
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return false;
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if (!holds_alternative<Block>(_block.statements.front()))
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return false;
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for (size_t i = 1; i < _block.statements.size(); ++i)
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if (!holds_alternative<FunctionDefinition>(_block.statements.at(i)))
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return false;
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return true;
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}
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