mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
69 lines
1.9 KiB
C++
69 lines
1.9 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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// SPDX-License-Identifier: GPL-3.0
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/**
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* Specific AST walker that generates the call graph.
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*/
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#pragma once
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#include <libyul/optimiser/ASTWalker.h>
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#include <map>
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#include <optional>
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#include <set>
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namespace solidity::yul
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{
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struct CallGraph
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{
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std::map<YulString, std::vector<YulString>> functionCalls;
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std::set<YulString> functionsWithLoops;
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/// @returns the set of functions contained in cycles in the call graph, i.e.
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/// functions that are part of a (mutual) recursion.
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/// Note that this does not include functions that merely call recursive functions.
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std::set<YulString> recursiveFunctions() const;
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};
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/**
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* Specific AST walker that generates the call graph.
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*
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* It also generates information about which functions contain for loops.
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*
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* The outermost (non-function) context is denoted by the empty string.
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*/
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class CallGraphGenerator: public ASTWalker
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{
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public:
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static CallGraph callGraph(Block const& _ast);
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using ASTWalker::operator();
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void operator()(FunctionCall const& _functionCall) override;
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void operator()(ForLoop const& _forLoop) override;
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void operator()(FunctionDefinition const& _functionDefinition) override;
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private:
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CallGraphGenerator();
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CallGraph m_callGraph;
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/// The name of the function we are currently visiting during traversal.
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YulString m_currentFunction;
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};
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}
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