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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/>.
*/
/**
* Optimiser component that uses the simplification rules to simplify expressions.
*/
#pragma once
#include <libyul/ASTDataForward.h>
#include <libyul/optimiser/ASTWalker.h>
namespace dev
{
namespace yul
{
/**
* Applies simplification rules to all expressions.
* The component will work best if the code is in SSA form, but
* this is not required for correctness.
*
* Prerequisite: Disambiguator.
*/
class ExpressionSimplifier: public ASTModifier
{
public:
using ASTModifier::operator();
virtual void visit(Expression& _expression);
static void run(Block& _ast);
private:
explicit ExpressionSimplifier(std::map<YulString, Expression const*> _ssaValues):
m_ssaValues(std::move(_ssaValues))
{}
std::map<YulString, Expression const*> m_ssaValues;
};
}
}
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