/*( 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 . */ /** * Optimisation stage that replaces variables by their most recently assigned expressions. */ #include #include #include #include #include using namespace std; using namespace dev; using namespace yul; void Rematerialiser::visit(Expression& _e) { if (_e.type() == typeid(Identifier)) { Identifier& identifier = boost::get(_e); if (m_value.count(identifier.name)) { YulString name = identifier.name; for (auto const& ref: m_references[name]) assertThrow(inScope(ref), OptimizerException, ""); assertThrow(m_value.at(name), OptimizerException, ""); auto const& value = *m_value.at(name); if (CodeSize::codeSize(value) <= 7) _e = (ASTCopier{}).translate(value); } } DataFlowAnalyzer::visit(_e); }