mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
64 lines
2.0 KiB
C++
64 lines
2.0 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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/**
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* Optimiser component that combines syntactically equivalent functions.
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*/
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#include <libyul/optimiser/EquivalentFunctionDetector.h>
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#include <libyul/optimiser/SyntacticalEquality.h>
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#include <libyul/AsmData.h>
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#include <libyul/optimiser/Metrics.h>
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using namespace std;
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using namespace dev;
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using namespace yul;
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using namespace solidity;
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void EquivalentFunctionDetector::operator()(FunctionDefinition const& _fun)
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{
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RoughHeuristic heuristic(_fun);
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auto& candidates = m_candidates[heuristic];
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for (auto const& candidate: candidates)
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if (SyntacticallyEqual{}.statementEqual(_fun, *candidate))
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{
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m_duplicates[_fun.name] = candidate;
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return;
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}
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candidates.push_back(&_fun);
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}
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bool EquivalentFunctionDetector::RoughHeuristic::operator<(EquivalentFunctionDetector::RoughHeuristic const& _rhs) const
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{
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if (
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std::make_tuple(m_fun.parameters.size(), m_fun.returnVariables.size()) ==
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std::make_tuple(_rhs.m_fun.parameters.size(), _rhs.m_fun.returnVariables.size())
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)
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return codeSize() < _rhs.codeSize();
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else
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return
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std::make_tuple(m_fun.parameters.size(), m_fun.returnVariables.size()) <
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std::make_tuple(_rhs.m_fun.parameters.size(), _rhs.m_fun.returnVariables.size());
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}
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size_t EquivalentFunctionDetector::RoughHeuristic::codeSize() const
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{
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if (!m_codeSize)
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m_codeSize = CodeSize::codeSize(m_fun.body);
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return *m_codeSize;
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}
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