mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
124 lines
4.2 KiB
C++
124 lines
4.2 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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/**
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* Analysis part of inline assembly.
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*/
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#pragma once
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#include <libsolidity/interface/Exceptions.h>
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#include <libsolidity/interface/EVMVersion.h>
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#include <libsolidity/inlineasm/AsmScope.h>
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#include <libyul/backends/evm/AbstractAssembly.h>
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#include <libsolidity/inlineasm/AsmDataForward.h>
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#include <boost/variant.hpp>
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#include <boost/optional.hpp>
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#include <functional>
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#include <memory>
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namespace dev
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{
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namespace solidity
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{
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class ErrorReporter;
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namespace assembly
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{
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struct AsmAnalysisInfo;
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/**
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* Performs the full analysis stage, calls the ScopeFiller internally, then resolves
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* references and performs other checks.
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* If all these checks pass, code generation should not throw errors.
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*/
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class AsmAnalyzer: public boost::static_visitor<bool>
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{
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public:
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explicit AsmAnalyzer(
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AsmAnalysisInfo& _analysisInfo,
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ErrorReporter& _errorReporter,
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EVMVersion _evmVersion,
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boost::optional<Error::Type> _errorTypeForLoose,
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AsmFlavour _flavour = AsmFlavour::Loose,
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yul::ExternalIdentifierAccess::Resolver const& _resolver = yul::ExternalIdentifierAccess::Resolver()
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):
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m_resolver(_resolver),
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m_info(_analysisInfo),
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m_errorReporter(_errorReporter),
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m_evmVersion(_evmVersion),
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m_flavour(_flavour),
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m_errorTypeForLoose(_errorTypeForLoose)
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{}
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bool analyze(assembly::Block const& _block);
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bool operator()(assembly::Instruction const&);
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bool operator()(assembly::Literal const& _literal);
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bool operator()(assembly::Identifier const&);
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bool operator()(assembly::FunctionalInstruction const& _functionalInstruction);
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bool operator()(assembly::Label const& _label);
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bool operator()(assembly::ExpressionStatement const&);
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bool operator()(assembly::StackAssignment const&);
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bool operator()(assembly::Assignment const& _assignment);
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bool operator()(assembly::VariableDeclaration const& _variableDeclaration);
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bool operator()(assembly::FunctionDefinition const& _functionDefinition);
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bool operator()(assembly::FunctionCall const& _functionCall);
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bool operator()(assembly::If const& _if);
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bool operator()(assembly::Switch const& _switch);
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bool operator()(assembly::ForLoop const& _forLoop);
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bool operator()(assembly::Block const& _block);
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private:
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/// Visits the statement and expects it to deposit one item onto the stack.
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bool expectExpression(Expression const& _expr);
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bool expectDeposit(int _deposit, int _oldHeight, SourceLocation const& _location);
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/// Verifies that a variable to be assigned to exists and has the same size
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/// as the value, @a _valueSize, unless that is equal to -1.
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bool checkAssignment(assembly::Identifier const& _assignment, size_t _valueSize = size_t(-1));
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Scope& scope(assembly::Block const* _block);
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void expectValidType(std::string const& type, SourceLocation const& _location);
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void warnOnInstructions(solidity::Instruction _instr, SourceLocation const& _location);
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/// Depending on @a m_flavour and @a m_errorTypeForLoose, throws an internal compiler
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/// exception (if the flavour is not Loose), reports an error/warning
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/// (if m_errorTypeForLoose is set) or does nothing.
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void checkLooseFeature(SourceLocation const& _location, std::string const& _description);
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int m_stackHeight = 0;
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yul::ExternalIdentifierAccess::Resolver m_resolver;
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Scope* m_currentScope = nullptr;
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/// Variables that are active at the current point in assembly (as opposed to
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/// "part of the scope but not yet declared")
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std::set<Scope::Variable const*> m_activeVariables;
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AsmAnalysisInfo& m_info;
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ErrorReporter& m_errorReporter;
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EVMVersion m_evmVersion;
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AsmFlavour m_flavour = AsmFlavour::Loose;
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boost::optional<Error::Type> m_errorTypeForLoose;
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};
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}
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}
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}
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