mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
93 lines
2.9 KiB
C++
93 lines
2.9 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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* Transformation of a Yul AST into a control flow graph.
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*/
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#pragma once
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#include <libyul/backends/evm/ControlFlowGraph.h>
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namespace solidity::yul
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{
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class ControlFlowGraphBuilder
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{
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public:
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ControlFlowGraphBuilder(ControlFlowGraphBuilder const&) = delete;
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ControlFlowGraphBuilder& operator=(ControlFlowGraphBuilder const&) = delete;
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static std::unique_ptr<CFG> build(AsmAnalysisInfo const& _analysisInfo, Dialect const& _dialect, Block const& _block);
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StackSlot operator()(Expression const& _literal);
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StackSlot operator()(Literal const& _literal);
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StackSlot operator()(Identifier const& _identifier);
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StackSlot operator()(FunctionCall const&);
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void operator()(VariableDeclaration const& _varDecl);
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void operator()(Assignment const& _assignment);
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void operator()(ExpressionStatement const& _statement);
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void operator()(Block const& _block);
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void operator()(If const& _if);
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void operator()(Switch const& _switch);
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void operator()(ForLoop const&);
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void operator()(Break const&);
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void operator()(Continue const&);
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void operator()(Leave const&);
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void operator()(FunctionDefinition const&);
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private:
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ControlFlowGraphBuilder(
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CFG& _graph,
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AsmAnalysisInfo const& _analysisInfo,
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Dialect const& _dialect
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);
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void registerFunction(FunctionDefinition const& _function);
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Stack const& visitFunctionCall(FunctionCall const&);
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Stack visitAssignmentRightHandSide(Expression const& _expression, size_t _expectedSlotCount);
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Scope::Function const& lookupFunction(YulString _name) const;
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Scope::Variable const& lookupVariable(YulString _name) const;
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/// Resets m_currentBlock to enforce a subsequent explicit reassignment.
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void makeConditionalJump(
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std::shared_ptr<DebugData const> _debugData,
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StackSlot _condition,
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CFG::BasicBlock& _nonZero,
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CFG::BasicBlock& _zero
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);
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void jump(
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std::shared_ptr<DebugData const> _debugData,
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CFG::BasicBlock& _target,
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bool _backwards = false
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);
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CFG& m_graph;
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AsmAnalysisInfo const& m_info;
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Dialect const& m_dialect;
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CFG::BasicBlock* m_currentBlock = nullptr;
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Scope* m_scope = nullptr;
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struct ForLoopInfo
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{
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std::reference_wrapper<CFG::BasicBlock> afterLoop;
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std::reference_wrapper<CFG::BasicBlock> post;
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};
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std::optional<ForLoopInfo> m_forLoopInfo;
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std::optional<CFG::FunctionInfo*> m_currentFunction;
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};
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}
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