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

110 lines
2.9 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/>.
*/
/**
* Specific AST walker that collects all defined names.
*/
#include <libyul/optimiser/NameCollector.h>
#include <libyul/AsmData.h>
using namespace std;
using namespace solidity;
using namespace solidity::yul;
using namespace solidity::util;
void NameCollector::operator()(VariableDeclaration const& _varDecl)
{
for (auto const& var: _varDecl.variables)
m_names.emplace(var.name);
}
void NameCollector::operator ()(FunctionDefinition const& _funDef)
{
m_names.emplace(_funDef.name);
for (auto const arg: _funDef.parameters)
m_names.emplace(arg.name);
for (auto const ret: _funDef.returnVariables)
m_names.emplace(ret.name);
ASTWalker::operator ()(_funDef);
}
void ReferencesCounter::operator()(Identifier const& _identifier)
{
++m_references[_identifier.name];
}
void ReferencesCounter::operator()(FunctionCall const& _funCall)
{
if (m_countWhat == VariablesAndFunctions)
++m_references[_funCall.functionName.name];
ASTWalker::operator()(_funCall);
}
map<YulString, size_t> ReferencesCounter::countReferences(Block const& _block, CountWhat _countWhat)
{
ReferencesCounter counter(_countWhat);
counter(_block);
return counter.references();
}
map<YulString, size_t> ReferencesCounter::countReferences(FunctionDefinition const& _function, CountWhat _countWhat)
{
ReferencesCounter counter(_countWhat);
counter(_function);
return counter.references();
}
map<YulString, size_t> ReferencesCounter::countReferences(Expression const& _expression, CountWhat _countWhat)
{
ReferencesCounter counter(_countWhat);
counter.visit(_expression);
return counter.references();
}
void Assignments::operator()(Assignment const& _assignment)
{
for (auto const& var: _assignment.variableNames)
m_names.emplace(var.name);
}
void AssignmentsSinceContinue::operator()(ForLoop const& _forLoop)
{
m_forLoopDepth++;
ASTWalker::operator()(_forLoop);
m_forLoopDepth--;
}
void AssignmentsSinceContinue::operator()(Continue const&)
{
if (m_forLoopDepth == 0)
m_continueFound = true;
}
void AssignmentsSinceContinue::operator()(Assignment const& _assignment)
{
if (m_continueFound)
for (auto const& var: _assignment.variableNames)
m_names.emplace(var.name);
}
void AssignmentsSinceContinue::operator()(FunctionDefinition const&)
{
yulAssert(false, "");
}