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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 performs function inlining.
*/
#pragma once
#include <libyul/optimiser/ASTWalker.h>
#include <libyul/ASTDataForward.h>
#include <boost/variant.hpp>
#include <boost/optional.hpp>
#include <set>
namespace yul
{
/**
* Optimiser component that modifies an AST in place, inlining functions that can be
* inlined inside functional expressions, i.e. functions that
* - return a single value
* - have a body like r := <functional expression>
* - neither reference themselves nor r in the right hand side
*
* Furthermore, the arguments of the function call cannot have any side-effects.
*
* This component can only be used on sources with unique names.
*/
class ExpressionInliner: public ASTModifier
{
public:
ExpressionInliner(Block& _block):
m_block(_block)
{}
void run();
using ASTModifier::operator();
void operator()(FunctionDefinition& _fun) override;
void visit(Expression& _expression) override;
private:
std::map<YulString, FunctionDefinition const*> m_inlinableFunctions;
std::map<YulString, YulString> m_varReplacements;
/// Set of functions we are currently visiting inside.
std::set<YulString> m_currentFunctions;
Block& m_block;
};
}
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