mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
c9ed116621
This is taken from DataFlowAnalyzer and will be used in the optimizer step MemoryLoadResolver.
89 lines
2.1 KiB
C++
89 lines
2.1 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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#include <libyul/optimiser/Scoper.h>
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#include <libyul/AST.h>
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#include <libyul/Exceptions.h>
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#include <libsolutil/CommonData.h>
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#include <boost/range/adaptor/reversed.hpp>
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#include <set>
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using namespace solidity::yul;
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using namespace solidity::util;
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using namespace std;
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void Scoper::operator()(VariableDeclaration& _varDecl)
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{
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set<YulString> names;
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for (auto const& var: _varDecl.variables)
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names.emplace(var.name);
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m_variableScopes.back().variables += names;
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ASTModifier::operator()(_varDecl);
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}
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void Scoper::operator()(FunctionDefinition& _fun)
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{
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pushScope(true);
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for (auto const& parameter: _fun.parameters)
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m_variableScopes.back().variables.emplace(parameter.name);
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for (auto const& var: _fun.returnVariables)
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{
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m_variableScopes.back().variables.emplace(var.name);
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}
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ASTModifier::operator()(_fun);
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popScope();
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}
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void Scoper::operator()(Block& _block)
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{
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size_t numScopes = m_variableScopes.size();
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pushScope(false);
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ASTModifier::operator()(_block);
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popScope();
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yulAssert(numScopes == m_variableScopes.size(), "");
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}
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void Scoper::pushScope(bool _functionScope)
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{
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m_variableScopes.emplace_back(_functionScope);
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}
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void Scoper::popScope()
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{
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m_variableScopes.pop_back();
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}
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bool Scoper::inScope(YulString _variableName) const
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{
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for (auto const& scope: m_variableScopes | boost::adaptors::reversed)
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{
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if (scope.variables.count(_variableName))
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return true;
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if (scope.isFunction)
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return false;
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}
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return false;
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}
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