solidity/libyul/optimiser/TypeInfo.h
2020-02-24 15:05:19 +01:00

62 lines
1.6 KiB
C++

/*
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/>.
*/
/**
* Helper class that keeps track of the types while performing optimizations.
*/
#pragma once
#include <libyul/AsmDataForward.h>
#include <libyul/YulString.h>
#include <vector>
#include <map>
namespace solidity::yul
{
struct Dialect;
/**
* Helper class that keeps track of the types while performing optimizations.
*
* Only works on disambiguated sources!
*/
class TypeInfo
{
public:
TypeInfo(Dialect const& _dialect, Block const& _ast);
void setVariableType(YulString _name, YulString _type) { m_variableTypes[_name] = _type; }
/// @returns the type of an expression that is assumed to return exactly one value.
YulString typeOf(Expression const& _expression) const;
private:
class TypeCollector;
struct FunctionType
{
std::vector<YulString> parameters;
std::vector<YulString> returns;
};
Dialect const& m_dialect;
std::map<YulString, YulString> m_variableTypes;
std::map<YulString, FunctionType> m_functionTypes;
};
}