mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
93 lines
2.6 KiB
C++
93 lines
2.6 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/>.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <libyul/AST.h>
|
|
#include <libyul/Dialect.h>
|
|
#include <libyul/Exceptions.h>
|
|
|
|
// because of instruction
|
|
#include <libyul/backends/evm/EVMDialect.h>
|
|
|
|
#include <libsmtutil/SolverInterface.h>
|
|
|
|
#include <memory>
|
|
|
|
namespace solidity::smtutil
|
|
{
|
|
|
|
class SolverInterface;
|
|
class Expression;
|
|
struct Sort;
|
|
|
|
}
|
|
|
|
namespace solidity::yul
|
|
{
|
|
|
|
/**
|
|
* Base class for SMT based optimization steps.
|
|
*
|
|
* Works best when used with AST in SSA form.
|
|
*/
|
|
class SMTSolver
|
|
{
|
|
protected:
|
|
SMTSolver(
|
|
std::set<YulString> const& _ssaVariables,
|
|
Dialect const& _dialect
|
|
);
|
|
|
|
/// Helper function that encodes VariableDeclaration
|
|
void encodeVariableDeclaration(VariableDeclaration const& _varDecl);
|
|
|
|
/// The encoding for a builtin. The type of encoding determines what we are
|
|
/// solving for.
|
|
virtual smtutil::Expression encodeEVMBuiltin(
|
|
evmasm::Instruction _instruction,
|
|
std::vector<Expression> const& _arguments
|
|
) = 0;
|
|
|
|
smtutil::Expression encodeExpression(Expression const& _expression);
|
|
|
|
static smtutil::Expression int2bv(smtutil::Expression _arg);
|
|
static smtutil::Expression bv2int(smtutil::Expression _arg);
|
|
|
|
smtutil::Expression newVariable();
|
|
virtual smtutil::Expression newRestrictedVariable(bigint _maxValue = (bigint(1) << 256) - 1);
|
|
std::string uniqueName();
|
|
|
|
virtual std::shared_ptr<smtutil::Sort> defaultSort() const;
|
|
static smtutil::Expression booleanValue(smtutil::Expression _value);
|
|
static smtutil::Expression constantValue(bigint _value);
|
|
static smtutil::Expression literalValue(Literal const& _literal);
|
|
static smtutil::Expression twosComplementToSigned(smtutil::Expression _value);
|
|
static smtutil::Expression signedToTwosComplement(smtutil::Expression _value);
|
|
smtutil::Expression wrap(smtutil::Expression _value);
|
|
|
|
std::set<YulString> const& m_ssaVariables;
|
|
std::unique_ptr<smtutil::SolverInterface> m_solver;
|
|
std::map<YulString, smtutil::Expression> m_variables;
|
|
|
|
Dialect const& m_dialect;
|
|
|
|
private:
|
|
size_t m_varCounter = 0;
|
|
};
|
|
|
|
}
|