mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
63 lines
1.9 KiB
C++
63 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
|
|
|
|
#include <libyul/optimiser/VarDeclInitializer.h>
|
|
#include <libyul/AST.h>
|
|
|
|
#include <libsolutil/CommonData.h>
|
|
#include <libsolutil/Visitor.h>
|
|
#include <libyul/Dialect.h>
|
|
|
|
using namespace std;
|
|
using namespace solidity;
|
|
using namespace solidity::yul;
|
|
|
|
void VarDeclInitializer::operator()(Block& _block)
|
|
{
|
|
ASTModifier::operator()(_block);
|
|
|
|
using OptionalStatements = std::optional<vector<Statement>>;
|
|
util::GenericVisitor visitor{
|
|
util::VisitorFallback<OptionalStatements>{},
|
|
[this](VariableDeclaration& _varDecl) -> OptionalStatements
|
|
{
|
|
if (_varDecl.value)
|
|
return {};
|
|
|
|
if (_varDecl.variables.size() == 1)
|
|
{
|
|
_varDecl.value = make_unique<Expression>(m_dialect.zeroLiteralForType(_varDecl.variables.front().type));
|
|
return {};
|
|
}
|
|
else
|
|
{
|
|
OptionalStatements ret{vector<Statement>{}};
|
|
langutil::SourceLocation loc{std::move(_varDecl.location)};
|
|
for (auto& var: _varDecl.variables)
|
|
{
|
|
unique_ptr<Expression> expr = make_unique<Expression >(m_dialect.zeroLiteralForType(var.type));
|
|
ret->emplace_back(VariableDeclaration{loc, {std::move(var)}, std::move(expr)});
|
|
}
|
|
return ret;
|
|
}
|
|
}
|
|
};
|
|
|
|
util::iterateReplacing(_block.statements, [&](auto&& _statement) { return std::visit(visitor, _statement); });
|
|
}
|