mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Optimiser component that uses the simplification rules to simplify expressions.
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*/
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#pragma once
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#include <libyul/AsmDataForward.h>
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#include <libyul/optimiser/DataFlowAnalyzer.h>
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namespace solidity::yul
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{
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struct Dialect;
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struct OptimiserStepContext;
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/**
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* Applies simplification rules to all expressions.
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* The component will work best if the code is in SSA form, but
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* this is not required for correctness.
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*
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* It tracks the current values of variables using the DataFlowAnalyzer
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* and takes them into account for replacements.
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*
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* Prerequisite: Disambiguator, ForLoopInitRewriter.
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*/
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class ExpressionSimplifier: public DataFlowAnalyzer
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{
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public:
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static constexpr char const* name{"ExpressionSimplifier"};
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static void run(OptimiserStepContext&, Block& _ast);
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using ASTModifier::operator();
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void visit(Expression& _expression) override;
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private:
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explicit ExpressionSimplifier(Dialect const& _dialect): DataFlowAnalyzer(_dialect) {}
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};
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}
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