solidity/libyul/CompilabilityChecker.cpp
2019-02-21 21:59:46 +01:00

67 lines
2.1 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/>.
*/
/**
* Component that checks whether all variables are reachable on the stack.
*/
#include <libyul/CompilabilityChecker.h>
#include <libyul/AsmAnalysis.h>
#include <libyul/AsmAnalysisInfo.h>
#include <libyul/backends/evm/EVMCodeTransform.h>
#include <libyul/backends/evm/NoOutputAssembly.h>
#include <liblangutil/EVMVersion.h>
using namespace std;
using namespace yul;
using namespace dev;
using namespace dev::solidity;
std::map<YulString, int> CompilabilityChecker::run(std::shared_ptr<Dialect> _dialect, Block const& _ast)
{
if (_dialect->flavour == AsmFlavour::Yul)
return {};
solAssert(_dialect->flavour == AsmFlavour::Strict, "");
solAssert(dynamic_cast<EVMDialect const*>(_dialect.get()), "");
shared_ptr<NoOutputEVMDialect> noOutputDialect = make_shared<NoOutputEVMDialect>(dynamic_pointer_cast<EVMDialect>(_dialect));
bool optimize = true;
yul::AsmAnalysisInfo analysisInfo =
yul::AsmAnalyzer::analyzeStrictAssertCorrect(noOutputDialect, _ast);
NoOutputAssembly assembly;
CodeTransform transform(assembly, analysisInfo, _ast, *noOutputDialect, optimize);
try
{
transform(_ast);
}
catch (StackTooDeepError const&)
{
solAssert(!transform.stackErrors().empty(), "Got stack too deep exception that was not stored.");
}
std::map<YulString, int> functions;
for (StackTooDeepError const& error: transform.stackErrors())
functions[error.functionName] = max(error.depth, functions[error.functionName]);
return functions;
}