solidity/libjulia/optimiser/ExpressionSimplifier.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/>.
*/
/**
* Optimiser component that uses the simplification rules to simplify expressions.
*/
#include <libjulia/optimiser/ExpressionSimplifier.h>
#include <libjulia/optimiser/SimplificationRules.h>
#include <libjulia/optimiser/Semantics.h>
#include <libsolidity/inlineasm/AsmData.h>
#include <libsolidity/interface/Exceptions.h>
#include <libdevcore/CommonData.h>
using namespace std;
using namespace dev;
using namespace dev::julia;
using namespace dev::solidity;
void ExpressionSimplifier::visit(Expression& _expression)
{
ASTModifier::visit(_expression);
while (auto match = SimplificationRules::findFirstMatch(_expression))
{
// Do not apply the rule if it removes non-constant parts of the expression.
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// TODO: The check could actually be less strict than "movable".
// We only require "Does not cause side-effects".
if (match->removesNonConstants && !MovableChecker(_expression).movable())
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return;
_expression = match->action().toExpression(locationOf(_expression));
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}
}