mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
105 lines
2.8 KiB
C++
105 lines
2.8 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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* Helper class that keeps track of the types while performing optimizations.
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*/
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#include <libyul/optimiser/TypeInfo.h>
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#include <libyul/optimiser/NameCollector.h>
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#include <libyul/AST.h>
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#include <libyul/Dialect.h>
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#include <libsolutil/Visitor.h>
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using namespace std;
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using namespace solidity::yul;
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using namespace solidity::util;
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class TypeInfo::TypeCollector: public ASTWalker
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{
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public:
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explicit TypeCollector(Block const& _block)
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{
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(*this)(_block);
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}
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using ASTWalker::operator();
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void operator()(VariableDeclaration const& _varDecl) override
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{
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for (auto const& var: _varDecl.variables)
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variableTypes[var.name] = var.type;
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}
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void operator()(FunctionDefinition const& _funDef) override
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{
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ASTWalker::operator()(_funDef);
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auto& funType = functionTypes[_funDef.name];
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for (auto const& arg: _funDef.parameters)
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{
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funType.parameters.emplace_back(arg.type);
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variableTypes[arg.name] = arg.type;
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}
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for (auto const& ret: _funDef.returnVariables)
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{
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funType.returns.emplace_back(ret.type);
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variableTypes[ret.name] = ret.type;
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}
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}
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std::map<YulString, YulString> variableTypes;
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std::map<YulString, FunctionType> functionTypes;
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};
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TypeInfo::TypeInfo(Dialect const& _dialect, Block const& _ast):
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m_dialect(_dialect)
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{
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TypeCollector types(_ast);
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m_functionTypes = std::move(types.functionTypes);
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m_variableTypes = std::move(types.variableTypes);
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}
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YulString TypeInfo::typeOf(Expression const& _expression) const
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{
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return std::visit(GenericVisitor{
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[&](FunctionCall const& _funCall) {
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YulString name = _funCall.functionName.name;
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vector<YulString> const* retTypes = nullptr;
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if (BuiltinFunction const* fun = m_dialect.builtin(name))
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retTypes = &fun->returns;
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else
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retTypes = &m_functionTypes.at(name).returns;
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yulAssert(retTypes && retTypes->size() == 1, "Call to typeOf for non-single-value expression.");
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return retTypes->front();
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},
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[&](Identifier const& _identifier) {
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return m_variableTypes.at(_identifier.name);
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},
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[&](Literal const& _literal) {
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return _literal.type;
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}
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}, _expression);
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}
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YulString TypeInfo::typeOfVariable(YulString _name) const
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{
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return m_variableTypes.at(_name);
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}
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