libyul/optimiser/NameCollector.cpp


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/*
    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 dev;
using namespace yul;

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)
{
    ++m_references[_funCall.functionName.name];
    ASTWalker::operator()(_funCall);
}

map<YulString, size_t> ReferencesCounter::countReferences(Block const& _block)
{
    ReferencesCounter counter;
    counter(_block);
    return counter.references();
}

map<YulString, size_t> ReferencesCounter::countReferences(Expression const& _expression)
{
    ReferencesCounter counter;
    counter.visit(_expression);
    return counter.references();
}

void Assignments::operator()(Assignment const& _assignment)
{
    for (auto const& var: _assignment.variableNames)
        m_names.emplace(var.name);
}