mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
86 lines
2.3 KiB
C++
86 lines
2.3 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 renames identifiers to free up certain names.
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*/
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#include <libyul/optimiser/NameDisplacer.h>
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#include <libyul/AST.h>
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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 NameDisplacer::operator()(Identifier& _identifier)
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{
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checkAndReplace(_identifier.name);
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}
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void NameDisplacer::operator()(VariableDeclaration& _varDecl)
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{
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for (TypedName& var: _varDecl.variables)
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checkAndReplaceNew(var.name);
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ASTModifier::operator()(_varDecl);
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}
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void NameDisplacer::operator()(FunctionDefinition& _function)
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{
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// Should have been done in the block already.
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yulAssert(!m_namesToFree.count(_function.name), "");
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for (auto& param: _function.parameters)
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checkAndReplaceNew(param.name);
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for (auto& retVar: _function.returnVariables)
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checkAndReplaceNew(retVar.name);
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ASTModifier::operator()(_function);
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}
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void NameDisplacer::operator()(FunctionCall& _funCall)
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{
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checkAndReplace(_funCall.functionName.name);
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ASTModifier::operator()(_funCall);
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}
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void NameDisplacer::operator()(Block& _block)
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{
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// First replace all the names of function definitions
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// because of scoping.
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for (auto& st: _block.statements)
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if (holds_alternative<FunctionDefinition>(st))
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checkAndReplaceNew(std::get<FunctionDefinition>(st).name);
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ASTModifier::operator()(_block);
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}
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void NameDisplacer::checkAndReplaceNew(YulString& _name)
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{
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yulAssert(!m_translations.count(_name), "");
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if (m_namesToFree.count(_name))
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_name = (m_translations[_name] = m_nameDispenser.newName(_name));
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}
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void NameDisplacer::checkAndReplace(YulString& _name) const
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{
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if (m_translations.count(_name))
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_name = m_translations.at(_name);
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}
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