solidity/test/libyul/YulOptimizerTest.cpp

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/*
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/>.
*/
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#include <test/libyul/YulOptimizerTest.h>
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#include <test/libsolidity/FormattedScope.h>
#include <test/Options.h>
#include <libyul/optimiser/BlockFlattener.h>
#include <libyul/optimiser/VarDeclPropagator.h>
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#include <libyul/optimiser/Disambiguator.h>
#include <libyul/optimiser/CommonSubexpressionEliminator.h>
#include <libyul/optimiser/NameCollector.h>
#include <libyul/optimiser/ExpressionSplitter.h>
#include <libyul/optimiser/FunctionGrouper.h>
#include <libyul/optimiser/FunctionHoister.h>
#include <libyul/optimiser/ExpressionInliner.h>
#include <libyul/optimiser/FullInliner.h>
#include <libyul/optimiser/MainFunction.h>
#include <libyul/optimiser/Rematerialiser.h>
#include <libyul/optimiser/ExpressionSimplifier.h>
#include <libyul/optimiser/UnusedPruner.h>
#include <libyul/optimiser/ExpressionJoiner.h>
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#include <libyul/optimiser/SSATransform.h>
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#include <libyul/optimiser/RedundantAssignEliminator.h>
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#include <libyul/optimiser/Suite.h>
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#include <libsolidity/parsing/Scanner.h>
#include <libsolidity/inlineasm/AsmPrinter.h>
#include <libsolidity/inlineasm/AsmParser.h>
#include <libsolidity/inlineasm/AsmAnalysis.h>
#include <libsolidity/interface/SourceReferenceFormatter.h>
#include <libsolidity/interface/ErrorReporter.h>
#include <boost/test/unit_test.hpp>
#include <boost/algorithm/string.hpp>
#include <fstream>
using namespace dev;
using namespace dev::yul;
using namespace dev::yul::test;
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using namespace dev::solidity;
using namespace dev::solidity::test;
using namespace std;
YulOptimizerTest::YulOptimizerTest(string const& _filename)
{
boost::filesystem::path path(_filename);
if (path.empty() || std::next(path.begin()) == path.end() || std::next(std::next(path.begin())) == path.end())
BOOST_THROW_EXCEPTION(runtime_error("Filename path has to contain a directory: \"" + _filename + "\"."));
m_optimizerStep = std::prev(std::prev(path.end()))->string();
ifstream file(_filename);
if (!file)
BOOST_THROW_EXCEPTION(runtime_error("Cannot open test case: \"" + _filename + "\"."));
file.exceptions(ios::badbit);
string line;
while (getline(file, line))
{
if (boost::algorithm::starts_with(line, "// ----"))
break;
if (m_source.empty() && boost::algorithm::starts_with(line, "// yul"))
m_yul = true;
m_source += line + "\n";
}
while (getline(file, line))
if (boost::algorithm::starts_with(line, "// "))
m_expectation += line.substr(3) + "\n";
else
m_expectation += line + "\n";
}
bool YulOptimizerTest::run(ostream& _stream, string const& _linePrefix, bool const _formatted)
{
assembly::AsmPrinter printer{m_yul};
shared_ptr<Block> ast;
shared_ptr<assembly::AsmAnalysisInfo> analysisInfo;
if (!parse(_stream, _linePrefix, _formatted))
return false;
if (m_optimizerStep == "disambiguator")
disambiguate();
else if (m_optimizerStep == "blockFlattener")
{
disambiguate();
BlockFlattener{}(*m_ast);
}
else if (m_optimizerStep == "varDeclPropagator")
{
disambiguate();
VarDeclPropagator{}(*m_ast);
}
else if (m_optimizerStep == "commonSubexpressionEliminator")
{
disambiguate();
(CommonSubexpressionEliminator{})(*m_ast);
}
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else if (m_optimizerStep == "expressionSplitter")
{
NameDispenser nameDispenser(*m_ast);
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ExpressionSplitter{nameDispenser}(*m_ast);
}
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else if (m_optimizerStep == "functionGrouper")
{
disambiguate();
(FunctionGrouper{})(*m_ast);
}
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else if (m_optimizerStep == "functionHoister")
{
disambiguate();
(FunctionHoister{})(*m_ast);
}
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else if (m_optimizerStep == "expressionInliner")
{
disambiguate();
ExpressionInliner(*m_ast).run();
}
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else if (m_optimizerStep == "fullInliner")
{
disambiguate();
(FunctionHoister{})(*m_ast);
(FunctionGrouper{})(*m_ast);
NameDispenser nameDispenser(*m_ast);
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ExpressionSplitter{nameDispenser}(*m_ast);
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FullInliner(*m_ast, nameDispenser).run();
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ExpressionJoiner::run(*m_ast);
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}
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else if (m_optimizerStep == "mainFunction")
{
disambiguate();
(FunctionGrouper{})(*m_ast);
(MainFunction{})(*m_ast);
}
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else if (m_optimizerStep == "rematerialiser")
{
disambiguate();
(Rematerialiser{})(*m_ast);
}
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else if (m_optimizerStep == "expressionSimplifier")
{
disambiguate();
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ExpressionSimplifier::run(*m_ast);
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}
else if (m_optimizerStep == "fullSimplify")
{
disambiguate();
NameDispenser nameDispenser(*m_ast);
ExpressionSplitter{nameDispenser}(*m_ast);
CommonSubexpressionEliminator{}(*m_ast);
ExpressionSimplifier::run(*m_ast);
UnusedPruner::runUntilStabilised(*m_ast);
ExpressionJoiner::run(*m_ast);
ExpressionJoiner::run(*m_ast);
}
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else if (m_optimizerStep == "unusedPruner")
{
disambiguate();
UnusedPruner::runUntilStabilised(*m_ast);
}
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else if (m_optimizerStep == "expressionJoiner")
{
disambiguate();
ExpressionJoiner::run(*m_ast);\
}
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else if (m_optimizerStep == "ssaTransform")
{
disambiguate();
NameDispenser nameDispenser(*m_ast);
SSATransform::run(*m_ast, nameDispenser);
}
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else if (m_optimizerStep == "redundantAssignEliminator")
{
disambiguate();
RedundantAssignEliminator::run(*m_ast);
}
else if (m_optimizerStep == "ssaPlusCleanup")
{
disambiguate();
NameDispenser nameDispenser(*m_ast);
SSATransform::run(*m_ast, nameDispenser);
RedundantAssignEliminator::run(*m_ast);
}
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else if (m_optimizerStep == "fullSuite")
OptimiserSuite::run(*m_ast, *m_analysisInfo);
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else
{
FormattedScope(_stream, _formatted, {formatting::BOLD, formatting::RED}) << _linePrefix << "Invalid optimizer step: " << m_optimizerStep << endl;
return false;
}
m_obtainedResult = m_optimizerStep + "\n" + printer(*m_ast) + "\n";
if (m_expectation != m_obtainedResult)
{
string nextIndentLevel = _linePrefix + " ";
FormattedScope(_stream, _formatted, {formatting::BOLD, formatting::CYAN}) << _linePrefix << "Expected result:" << endl;
// TODO could compute a simple diff with highlighted lines
printIndented(_stream, m_expectation, nextIndentLevel);
FormattedScope(_stream, _formatted, {formatting::BOLD, formatting::CYAN}) << _linePrefix << "Obtained result:" << endl;
printIndented(_stream, m_obtainedResult, nextIndentLevel);
return false;
}
return true;
}
void YulOptimizerTest::printSource(ostream& _stream, string const& _linePrefix, bool const) const
{
printIndented(_stream, m_source, _linePrefix);
}
void YulOptimizerTest::printUpdatedExpectations(ostream& _stream, string const& _linePrefix) const
{
printIndented(_stream, m_obtainedResult, _linePrefix);
}
void YulOptimizerTest::printIndented(ostream& _stream, string const& _output, string const& _linePrefix) const
{
stringstream output(_output);
string line;
while (getline(output, line))
_stream << _linePrefix << line << endl;
}
bool YulOptimizerTest::parse(ostream& _stream, string const& _linePrefix, bool const _formatted)
{
assembly::AsmFlavour flavour = m_yul ? assembly::AsmFlavour::Yul : assembly::AsmFlavour::Strict;
ErrorList errors;
ErrorReporter errorReporter(errors);
shared_ptr<Scanner> scanner = make_shared<Scanner>(CharStream(m_source), "");
m_ast = assembly::Parser(errorReporter, flavour).parse(scanner, false);
if (!m_ast || !errorReporter.errors().empty())
{
FormattedScope(_stream, _formatted, {formatting::BOLD, formatting::RED}) << _linePrefix << "Error parsing source." << endl;
printErrors(_stream, errorReporter.errors(), *scanner);
return false;
}
m_analysisInfo = make_shared<assembly::AsmAnalysisInfo>();
assembly::AsmAnalyzer analyzer(
*m_analysisInfo,
errorReporter,
dev::test::Options::get().evmVersion(),
boost::none,
flavour
);
if (!analyzer.analyze(*m_ast) || !errorReporter.errors().empty())
{
FormattedScope(_stream, _formatted, {formatting::BOLD, formatting::RED}) << _linePrefix << "Error analyzing source." << endl;
printErrors(_stream, errorReporter.errors(), *scanner);
return false;
}
return true;
}
void YulOptimizerTest::disambiguate()
{
*m_ast = boost::get<Block>(Disambiguator(*m_analysisInfo)(*m_ast));
m_analysisInfo.reset();
}
void YulOptimizerTest::printErrors(ostream& _stream, ErrorList const& _errors, Scanner const& _scanner)
{
SourceReferenceFormatter formatter(_stream, [&](string const&) -> Scanner const& { return _scanner; });
for (auto const& error: _errors)
formatter.printExceptionInformation(
*error,
(error->type() == Error::Type::Warning) ? "Warning" : "Error"
);
}