solidity/libyul/CompilabilityChecker.h

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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/>.
*/
// SPDX-License-Identifier: GPL-3.0
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/**
* Component that checks whether all variables are reachable on the stack.
*/
#pragma once
#include <libyul/Dialect.h>
#include <libyul/ASTForward.h>
#include <libyul/Object.h>
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#include <map>
#include <memory>
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namespace solidity::yul
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{
/**
* Component that checks whether all variables are reachable on the stack and
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* provides a mapping from function name to the largest stack difference found
* in that function (no entry present if that function is compilable), as well
* as the set of unreachable variables for each function.
*
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* This only works properly if the outermost block is compilable and
* functions are not nested. Otherwise, it might miss reporting some functions.
*
* Only checks the code of the object itself, does not descend into sub-objects.
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*/
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struct CompilabilityChecker
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{
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CompilabilityChecker(Dialect const& _dialect, Object const& _object, bool _optimizeStackAllocation);
std::map<YulString, std::set<YulString>> unreachableVariables;
std::map<YulString, int> stackDeficit;
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};
}