mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
75 lines
1.9 KiB
C++
75 lines
1.9 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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/**
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* Specific AST walkers that collect semantical facts.
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*/
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#include <libyul/optimiser/Semantics.h>
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#include <libyul/Exceptions.h>
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#include <libyul/AsmData.h>
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#include <libyul/Dialect.h>
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#include <libevmasm/SemanticInformation.h>
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#include <libdevcore/CommonData.h>
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using namespace std;
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using namespace dev;
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using namespace yul;
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MovableChecker::MovableChecker(Dialect const& _dialect):
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m_dialect(_dialect)
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{
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}
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MovableChecker::MovableChecker(Dialect const& _dialect, Expression const& _expression):
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MovableChecker(_dialect)
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{
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visit(_expression);
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}
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void MovableChecker::operator()(Identifier const& _identifier)
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{
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ASTWalker::operator()(_identifier);
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m_variableReferences.emplace(_identifier.name);
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}
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void MovableChecker::operator()(FunctionalInstruction const& _instr)
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{
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if (!eth::SemanticInformation::movable(_instr.instruction))
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m_movable = false;
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else
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ASTWalker::operator()(_instr);
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}
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void MovableChecker::operator()(FunctionCall const& _functionCall)
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{
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if (BuiltinFunction const* f = m_dialect.builtin(_functionCall.functionName.name))
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if (f->movable)
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{
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ASTWalker::operator()(_functionCall);
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return;
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}
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m_movable = false;
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}
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void MovableChecker::visit(Statement const&)
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{
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assertThrow(false, OptimizerException, "Movability for statement requested.");
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}
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