mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
73 lines
2.2 KiB
C++
73 lines
2.2 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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* Component that checks whether all variables are reachable on the stack.
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*/
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#include <libyul/CompilabilityChecker.h>
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#include <libyul/AsmAnalysis.h>
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#include <libyul/AsmAnalysisInfo.h>
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#include <libyul/backends/evm/EVMCodeTransform.h>
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#include <libyul/backends/evm/NoOutputAssembly.h>
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using namespace solidity;
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using namespace solidity::yul;
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using namespace solidity::util;
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CompilabilityChecker::CompilabilityChecker(
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Dialect const& _dialect,
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Object const& _object,
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bool _optimizeStackAllocation
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)
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{
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if (auto const* evmDialect = dynamic_cast<EVMDialect const*>(&_dialect))
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{
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NoOutputEVMDialect noOutputDialect(*evmDialect);
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yul::AsmAnalysisInfo analysisInfo =
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yul::AsmAnalyzer::analyzeStrictAssertCorrect(noOutputDialect, _object);
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BuiltinContext builtinContext;
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builtinContext.currentObject = &_object;
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if (!_object.name.empty())
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builtinContext.subIDs[_object.name] = 1;
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for (auto const& subNode: _object.subObjects)
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builtinContext.subIDs[subNode->name] = 1;
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NoOutputAssembly assembly{evmDialect->evmVersion()};
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CodeTransform transform(
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assembly,
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analysisInfo,
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*_object.code,
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noOutputDialect,
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builtinContext,
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_optimizeStackAllocation
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);
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transform(*_object.code);
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for (StackTooDeepError const& error: transform.stackErrors())
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{
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auto& unreachables = unreachableVariables[error.functionName];
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if (!util::contains(unreachables, error.variable))
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unreachables.emplace_back(error.variable);
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int& deficit = stackDeficit[error.functionName];
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deficit = std::max(error.depth, deficit);
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}
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}
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}
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