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++
/*
|
|
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/AsmDataForward.h>
|
|
|
|
#include <libyul/optimiser/DataFlowAnalyzer.h>
|
|
|
|
namespace yul
|
|
{
|
|
struct Dialect;
|
|
struct OptimiserStepContext;
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* It tracks the current values of variables using the DataFlowAnalyzer
|
|
* and takes them into account for replacements.
|
|
*
|
|
* Prerequisite: Disambiguator, ForLoopInitRewriter.
|
|
*/
|
|
class ExpressionSimplifier: public DataFlowAnalyzer
|
|
{
|
|
public:
|
|
static constexpr char const* name{"ExpressionSimplifier"};
|
|
static void run(OptimiserStepContext&, Block& _ast);
|
|
|
|
using ASTModifier::operator();
|
|
virtual void visit(Expression& _expression);
|
|
|
|
private:
|
|
explicit ExpressionSimplifier(Dialect const& _dialect): DataFlowAnalyzer(_dialect) {}
|
|
};
|
|
|
|
}
|