solidity/libyul/optimiser/Disambiguator.cpp
2020-01-07 15:51:50 +01:00

77 lines
2.3 KiB
C++

/*
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 <http://www.gnu.org/licenses/>.
*/
/**
* Optimiser component that makes all identifiers unique.
*/
#include <libyul/optimiser/Disambiguator.h>
#include <libyul/Exceptions.h>
#include <libyul/AsmData.h>
#include <libyul/AsmScope.h>
#include <libyul/Dialect.h>
using namespace std;
using namespace solidity;
using namespace solidity::yul;
using namespace solidity::util;
YulString Disambiguator::translateIdentifier(YulString _originalName)
{
if (m_dialect.builtin(_originalName) || m_externallyUsedIdentifiers.count(_originalName))
return _originalName;
assertThrow(!m_scopes.empty() && m_scopes.back(), OptimizerException, "");
Scope::Identifier const* id = m_scopes.back()->lookup(_originalName);
assertThrow(id, OptimizerException, "");
if (!m_translations.count(id))
m_translations[id] = m_nameDispenser.newName(_originalName);
return m_translations.at(id);
}
void Disambiguator::enterScope(Block const& _block)
{
enterScopeInternal(*m_info.scopes.at(&_block));
}
void Disambiguator::leaveScope(Block const& _block)
{
leaveScopeInternal(*m_info.scopes.at(&_block));
}
void Disambiguator::enterFunction(FunctionDefinition const& _function)
{
enterScopeInternal(*m_info.scopes.at(m_info.virtualBlocks.at(&_function).get()));
}
void Disambiguator::leaveFunction(FunctionDefinition const& _function)
{
leaveScopeInternal(*m_info.scopes.at(m_info.virtualBlocks.at(&_function).get()));
}
void Disambiguator::enterScopeInternal(Scope& _scope)
{
m_scopes.push_back(&_scope);
}
void Disambiguator::leaveScopeInternal(Scope& _scope)
{
assertThrow(!m_scopes.empty(), OptimizerException, "");
assertThrow(m_scopes.back() == &_scope, OptimizerException, "");
m_scopes.pop_back();
}