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Add stack limit evader.

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This commit is contained in:
Daniel Kirchner
2020-09-17 22:13:27 +02:00
parent b571fd05b0
commit f4b42d1c72
54 changed files with 2323 additions and 66 deletions
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test/libyul/YulOptimizerTest.cpp
+55
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@@ -46,6 +46,7 @@
#include <libyul/optimiser/LoadResolver.h>
#include <libyul/optimiser/LoopInvariantCodeMotion.h>
#include <libyul/optimiser/MainFunction.h>
#include <libyul/optimiser/StackLimitEvader.h>
#include <libyul/optimiser/NameDisplacer.h>
#include <libyul/optimiser/Rematerialiser.h>
#include <libyul/optimiser/ExpressionSimplifier.h>
@@ -60,6 +61,7 @@
#include <libyul/optimiser/RedundantAssignEliminator.h>
#include <libyul/optimiser/StructuralSimplifier.h>
#include <libyul/optimiser/StackCompressor.h>
#include <libyul/optimiser/StackToMemoryMover.h>
#include <libyul/optimiser/Suite.h>
#include <libyul/backends/evm/ConstantOptimiser.h>
#include <libyul/backends/evm/EVMDialect.h>
@@ -70,6 +72,7 @@
#include <libyul/AsmParser.h>
#include <libyul/AsmAnalysis.h>
#include <libyul/AssemblyStack.h>
#include <libyul/CompilabilityChecker.h>
#include <liblangutil/SourceReferenceFormatter.h>
#include <liblangutil/ErrorReporter.h>
@@ -378,6 +381,58 @@ TestCase::TestResult YulOptimizerTest::run(ostream& _stream, string const& _line
obj.analysisInfo = m_analysisInfo;
OptimiserSuite::run(*m_dialect, &meter, obj, true, solidity::frontend::OptimiserSettings::DefaultYulOptimiserSteps);
}
else if (m_optimizerStep == "stackLimitEvader")
{
yul::Object obj;
obj.code = m_object->code;
obj.analysisInfo = m_analysisInfo;
disambiguate();
StackLimitEvader::run(*m_context, obj, CompilabilityChecker{
*m_dialect,
obj,
true
}.unreachableVariables);
}
else if (m_optimizerStep == "fakeStackLimitEvader")
{
yul::Object obj;
obj.code = m_object->code;
obj.analysisInfo = m_analysisInfo;
disambiguate();
// Mark all variables with a name starting with "$" for escalation to memory.
struct FakeUnreachableGenerator: ASTWalker
{
map<YulString, set<YulString>> fakeUnreachables;
using ASTWalker::operator();
void operator()(FunctionDefinition const& _function) override
{
YulString originalFunctionName = m_currentFunction;
m_currentFunction = _function.name;
ASTWalker::operator()(_function);
m_currentFunction = originalFunctionName;
}
void visitVariableName(YulString _var)
{
if (!_var.empty() && _var.str().front() == '$')
fakeUnreachables[m_currentFunction].insert(_var);
}
void operator()(VariableDeclaration const& _varDecl) override
{
for (auto const& var: _varDecl.variables)
visitVariableName(var.name);
ASTWalker::operator()(_varDecl);
}
void operator()(Identifier const& _identifier) override
{
visitVariableName(_identifier.name);
ASTWalker::operator()(_identifier);
}
YulString m_currentFunction = YulString{};
};
FakeUnreachableGenerator fakeUnreachableGenerator;
fakeUnreachableGenerator(*obj.code);
StackLimitEvader::run(*m_context, obj, fakeUnreachableGenerator.fakeUnreachables);
}
else
{
AnsiColorized(_stream, _formatted, {formatting::BOLD, formatting::RED}) << _linePrefix << "Invalid optimizer step: " << m_optimizerStep << endl;