mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
75 lines
1.6 KiB
C++
75 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/>.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <libyul/optimiser/ASTWalker.h>
|
|
#include <libyul/optimiser/OptimiserStep.h>
|
|
#include <libyul/Dialect.h>
|
|
|
|
namespace yul
|
|
{
|
|
|
|
/**
|
|
* Reverses the transformation of ForLoopConditionIntoBody.
|
|
*
|
|
* For any movable ``c``, it turns
|
|
*
|
|
* for { ... } 1 { ... } {
|
|
* if iszero(c) { break }
|
|
* ...
|
|
* }
|
|
*
|
|
* into
|
|
*
|
|
* for { ... } c { ... } {
|
|
* ...
|
|
* }
|
|
*
|
|
* and it turns
|
|
*
|
|
* for { ... } 1 { ... } {
|
|
* if c { break }
|
|
* ...
|
|
* }
|
|
*
|
|
* into
|
|
*
|
|
* for { ... } iszero(c) { ... } {
|
|
* ...
|
|
* }
|
|
*
|
|
* The LiteralRematerialiser should be run before this step.
|
|
*/
|
|
class ForLoopConditionOutOfBody: public ASTModifier
|
|
{
|
|
public:
|
|
static constexpr char const* name{"ForLoopConditionOutOfBody"};
|
|
static void run(OptimiserStepContext&, Block& _ast);
|
|
|
|
using ASTModifier::operator();
|
|
void operator()(ForLoop& _forLoop) override;
|
|
|
|
private:
|
|
ForLoopConditionOutOfBody(Dialect const& _dialect):
|
|
m_dialect(_dialect)
|
|
{}
|
|
|
|
Dialect const& m_dialect;
|
|
};
|
|
|
|
}
|