solidity/libyul/optimiser/OptimizerUtilities.cpp
chriseth d9df3d50e2
Merge pull request #11311 from anurag-git/issue_10738-3
Use range-v3 loops(remove_erase, remove_erase_if)
2021-04-26 14:18:15 +02:00

60 lines
1.9 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/>.
*/
// SPDX-License-Identifier: GPL-3.0
/**
* Some useful snippets for the optimiser.
*/
#include <libyul/optimiser/OptimizerUtilities.h>
#include <libyul/backends/evm/EVMDialect.h>
#include <libyul/Dialect.h>
#include <libyul/AST.h>
#include <liblangutil/Token.h>
#include <libsolutil/CommonData.h>
#include <range/v3/action/remove_if.hpp>
using namespace std;
using namespace solidity;
using namespace solidity::langutil;
using namespace solidity::util;
using namespace solidity::yul;
void yul::removeEmptyBlocks(Block& _block)
{
auto isEmptyBlock = [](Statement const& _st) -> bool {
return holds_alternative<Block>(_st) && std::get<Block>(_st).statements.empty();
};
ranges::actions::remove_if(_block.statements, isEmptyBlock);
}
bool yul::isRestrictedIdentifier(Dialect const& _dialect, YulString const& _identifier)
{
return _identifier.empty() || TokenTraits::isYulKeyword(_identifier.str()) || _dialect.reservedIdentifier(_identifier);
}
optional<evmasm::Instruction> yul::toEVMInstruction(Dialect const& _dialect, YulString const& _name)
{
if (auto const* dialect = dynamic_cast<EVMDialect const*>(&_dialect))
if (BuiltinFunctionForEVM const* builtin = dialect->builtin(_name))
return builtin->instruction;
return nullopt;
}