Add optimizer setting for fuzzing.

libsolidity/codegen/CompilerContext.cpp

@@ -521,6 +521,7 @@ void CompilerContext::appendInlineAssembly(
 		analysisInfo,
 		*m_asm,
 		m_evmVersion,
+		_optimiserSettings.forceOldPipeline,
 		identifierAccess.generateCode,
 		_system,
 		_optimiserSettings.optimizeStackAllocation
@@ -551,6 +552,7 @@ void CompilerContext::optimizeYul(
 		&meter,
 		_object,
 		_optimiserSettings.optimizeStackAllocation,
+		_optimiserSettings.forceOldPipeline,
 		_optimiserSettings.yulOptimiserSteps,
 		isCreation? nullopt : make_optional(_optimiserSettings.expectedExecutionsPerDeployment),
 		_externalIdentifiers,

libsolidity/codegen/ContractCompiler.cpp

@@ -915,6 +915,7 @@ bool ContractCompiler::visit(InlineAssembly const& _inlineAssembly)
 		*analysisInfo,
 		*m_context.assemblyPtr(),
 		m_context.evmVersion(),
+		m_optimiserSettings.forceOldPipeline,
 		identifierAccessCodeGen,
 		false,
 		m_optimiserSettings.optimizeStackAllocation

libsolidity/interface/OptimiserSettings.h

@@ -149,6 +149,7 @@ struct OptimiserSettings
 	/// This specifies an estimate on how often each opcode in this assembly will be executed,
 	/// i.e. use a small value to optimise for size and a large value to optimise for runtime gas usage.
 	size_t expectedExecutionsPerDeployment = 200;
+	bool forceOldPipeline = false;
 };
 
 }

libyul/AssemblyStack.cpp

@@ -168,7 +168,7 @@ bool AssemblyStack::analyzeParsed(Object& _object)
 	return success;
 }
 
-void AssemblyStack::compileEVM(AbstractAssembly& _assembly, bool _optimize) const
+void AssemblyStack::compileEVM(AbstractAssembly& _assembly, bool _optimize, bool _forceOldPipeline) const
 {
 	EVMDialect const* dialect = nullptr;
 	switch (m_language)
@@ -185,7 +185,7 @@ void AssemblyStack::compileEVM(AbstractAssembly& _assembly, bool _optimize) cons
 			break;
 	}
 
-	EVMObjectCompiler::compile(*m_parserResult, _assembly, *dialect, _optimize);
+	EVMObjectCompiler::compile(*m_parserResult, _assembly, *dialect, _optimize, _forceOldPipeline);
 }
 
 void AssemblyStack::optimize(Object& _object, bool _isCreation)
@@ -205,6 +205,7 @@ void AssemblyStack::optimize(Object& _object, bool _isCreation)
 		meter.get(),
 		_object,
 		m_optimiserSettings.optimizeStackAllocation,
+		m_optimiserSettings.forceOldPipeline,
 		m_optimiserSettings.yulOptimiserSteps,
 		_isCreation ? nullopt : make_optional(m_optimiserSettings.expectedExecutionsPerDeployment),
 		{}
@@ -283,7 +284,7 @@ AssemblyStack::assembleEVMWithDeployed(optional<string_view> _deployName) const
 
 	evmasm::Assembly assembly;
 	EthAssemblyAdapter adapter(assembly);
-	compileEVM(adapter, m_optimiserSettings.optimizeStackAllocation);
+	compileEVM(adapter, m_optimiserSettings.optimizeStackAllocation, m_optimiserSettings.forceOldPipeline);
 
 	assembly.optimise(translateOptimiserSettings(m_optimiserSettings, m_evmVersion));
 

libyul/AssemblyStack.h

@@ -125,7 +125,7 @@ private:
 	bool analyzeParsed();
 	bool analyzeParsed(yul::Object& _object);
 public:
-	void compileEVM(yul::AbstractAssembly& _assembly, bool _optimize) const;
+	void compileEVM(yul::AbstractAssembly& _assembly, bool _optimize, bool _forceOldPipeline) const;
 private:
 	void optimize(yul::Object& _object, bool _isCreation);
 

libyul/backends/evm/AsmCodeGen.cpp

@@ -38,6 +38,7 @@ void CodeGenerator::assemble(
 	AsmAnalysisInfo& _analysisInfo,
 	evmasm::Assembly& _assembly,
 	langutil::EVMVersion _evmVersion,
+	bool _forceOldPipeline,
 	ExternalIdentifierAccess::CodeGenerator _identifierAccessCodeGen,
 	bool _system,
 	bool _optimizeStackAllocation
@@ -45,7 +46,7 @@ void CodeGenerator::assemble(
 {
 	EthAssemblyAdapter assemblyAdapter(_assembly);
 	BuiltinContext builtinContext;
-	if (_system && _optimizeStackAllocation && _evmVersion > EVMVersion::homestead())
+	if (!_forceOldPipeline && _system && _optimizeStackAllocation && _evmVersion > EVMVersion::homestead())
 	{
 		int oldStackHeight = assemblyAdapter.stackHeight();
 		assemblyAdapter.setStackHeight(0);

libyul/backends/evm/AsmCodeGen.h

@@ -44,6 +44,7 @@ public:
 		AsmAnalysisInfo& _analysisInfo,
 		evmasm::Assembly& _assembly,
 		langutil::EVMVersion _evmVersion,
+		bool _forceOldPipeline,
 		ExternalIdentifierAccess::CodeGenerator _identifierAccess = {},
 		bool _system = false,
 		bool _optimizeStackAllocation = false

libyul/backends/evm/EVMObjectCompiler.cpp

@@ -31,13 +31,13 @@
 using namespace solidity::yul;
 using namespace std;
 
-void EVMObjectCompiler::compile(Object& _object, AbstractAssembly& _assembly, EVMDialect const& _dialect, bool _optimize)
+void EVMObjectCompiler::compile(Object& _object, AbstractAssembly& _assembly, EVMDialect const& _dialect, bool _optimize, bool _forceOldPipeline)
 {
 	EVMObjectCompiler compiler(_assembly, _dialect);
-	compiler.run(_object, _optimize);
+	compiler.run(_object, _optimize, _forceOldPipeline);
 }
 
-void EVMObjectCompiler::run(Object& _object, bool _optimize)
+void EVMObjectCompiler::run(Object& _object, bool _optimize, bool _forceOldPipeline)
 {
 	BuiltinContext context;
 	context.currentObject = &_object;
@@ -49,7 +49,7 @@ void EVMObjectCompiler::run(Object& _object, bool _optimize)
 			auto subAssemblyAndID = m_assembly.createSubAssembly(subObject->name.str());
 			context.subIDs[subObject->name] = subAssemblyAndID.second;
 			subObject->subId = subAssemblyAndID.second;
-			compile(*subObject, *subAssemblyAndID.first, m_dialect, _optimize);
+			compile(*subObject, *subAssemblyAndID.first, m_dialect, _optimize, _forceOldPipeline);
 		}
 		else
 		{
@@ -63,7 +63,7 @@ void EVMObjectCompiler::run(Object& _object, bool _optimize)
 
 	yulAssert(_object.analysisInfo, "No analysis info.");
 	yulAssert(_object.code, "No code.");
-	if (_optimize && m_dialect.evmVersion() > langutil::EVMVersion::homestead())
+	if (!_forceOldPipeline && (_optimize && m_dialect.evmVersion() > langutil::EVMVersion::homestead()))
 	{
 
 		auto stackErrors = OptimizedEVMCodeTransform::run(m_assembly, *_object.analysisInfo, *_object.code, m_dialect, context);

libyul/backends/evm/EVMObjectCompiler.h

@@ -30,13 +30,13 @@ struct EVMDialect;
 class EVMObjectCompiler
 {
 public:
-	static void compile(Object& _object, AbstractAssembly& _assembly, EVMDialect const& _dialect, bool _optimize);
+	static void compile(Object& _object, AbstractAssembly& _assembly, EVMDialect const& _dialect, bool _optimize, bool _forceOldPipeline);
 private:
 	EVMObjectCompiler(AbstractAssembly& _assembly, EVMDialect const& _dialect):
 		m_assembly(_assembly), m_dialect(_dialect)
 	{}
 
-	void run(Object& _object, bool _optimize);
+	void run(Object& _object, bool _optimize, bool _forceOldPipeline);
 
 	AbstractAssembly& m_assembly;
 	EVMDialect const& m_dialect;

libyul/optimiser/Suite.cpp

@@ -87,6 +87,7 @@ void OptimiserSuite::run(
 	GasMeter const* _meter,
 	Object& _object,
 	bool _optimizeStackAllocation,
+	bool _forceOldPipeline,
 	string const& _optimisationSequence,
 	optional<size_t> _expectedExecutionsPerDeployment,
 	set<YulString> const& _externallyUsedIdentifiers,
@@ -95,6 +96,7 @@ void OptimiserSuite::run(
 {
 	EVMDialect const* evmDialect = dynamic_cast<EVMDialect const*>(&_dialect);
 	bool usesOptimizedCodeGenerator =
+		!_forceOldPipeline &&
 		_optimizeStackAllocation &&
 		evmDialect &&
 		evmDialect->evmVersion() > langutil::EVMVersion::homestead();

libyul/optimiser/Suite.h

@@ -64,6 +64,7 @@ public:
 		GasMeter const* _meter,
 		Object& _object,
 		bool _optimizeStackAllocation,
+		bool _forceOldPipeline,
 		std::string const& _optimisationSequence,
 		std::optional<size_t> _expectedExecutionsPerDeployment,
 		std::set<YulString> const& _externallyUsedIdentifiers = {},

test/libyul/EVMCodeTransformTest.cpp

@@ -61,7 +61,7 @@ TestCase::TestResult EVMCodeTransformTest::run(ostream& _stream, string const& _
 
 	evmasm::Assembly assembly;
 	EthAssemblyAdapter adapter(assembly);
-	stack.compileEVM(adapter, m_stackOpt);
+	stack.compileEVM(adapter, m_stackOpt, settings.forceOldPipeline);
 
 	std::ostringstream output;
 	output << assembly;

test/libyul/YulOptimizerTestCommon.cpp

@@ -79,8 +79,9 @@ using namespace std;
 
 YulOptimizerTestCommon::YulOptimizerTestCommon(
 	shared_ptr<Object> _obj,
-	Dialect const& _dialect
+	Dialect const& _dialect,
-)
+	bool _forceOldPipeline
+): m_forceOldPipeline(_forceOldPipeline)
 {
 	m_object = _obj;
 	m_ast = m_object->code;
@@ -322,6 +323,7 @@ YulOptimizerTestCommon::YulOptimizerTestCommon(
 				&meter,
 				*m_object,
 				true,
+				m_forceOldPipeline,
 				frontend::OptimiserSettings::DefaultYulOptimiserSteps,
 				frontend::OptimiserSettings::standard().expectedExecutionsPerDeployment
 			);

test/libyul/YulOptimizerTestCommon.h

@@ -40,7 +40,8 @@ class YulOptimizerTestCommon
 public:
 	explicit YulOptimizerTestCommon(
 		std::shared_ptr<Object> _obj,
-		Dialect const& _dialect
+		Dialect const& _dialect,
+		bool _forceOldPipeline = false
 	);
 	/// Sets optimiser step to be run to @param
 	/// _optimiserStep.
@@ -71,6 +72,7 @@ private:
 	std::shared_ptr<Block> m_ast;
 	std::shared_ptr<AsmAnalysisInfo> m_analysisInfo;
 	std::map<std::string, std::function<void(void)>> m_namedSteps;
+	bool m_forceOldPipeline = false;
 };
 
 }