Experimental feature switch for ABI encoder.

4 files changed, 16 insertions, 4 deletions

diff --git a/libsolidity/ast/ExperimentalFeatures.h b/libsolidity/ast/ExperimentalFeatures.h
index 04b26300..0c03ea4a 100644
--- a/libsolidity/ast/ExperimentalFeatures.h
+++ b/libsolidity/ast/ExperimentalFeatures.h
@@ -29,15 +29,19 @@ namespace solidity
 
 enum class ExperimentalFeature
 {
+	ABIEncoderV2, // new ABI encoder that makes use of JULIA
 	Test,
 	TestOnlyAnalysis
 };
 
-static const std::map<ExperimentalFeature, bool> ExperimentalFeatureOnlyAnalysis = {
+static const std::map<ExperimentalFeature, bool> ExperimentalFeatureOnlyAnalysis =
+{
 	{ ExperimentalFeature::TestOnlyAnalysis, true },
 };
 
-static const std::map<std::string, ExperimentalFeature> ExperimentalFeatureNames = {
+static const std::map<std::string, ExperimentalFeature> ExperimentalFeatureNames =
+{
+	{ "ABIEncoderV2", ExperimentalFeature::ABIEncoderV2 },
 	{ "__test", ExperimentalFeature::Test },
 	{ "__testOnlyAnalysis", ExperimentalFeature::TestOnlyAnalysis },
 };
diff --git a/libsolidity/codegen/CompilerContext.h b/libsolidity/codegen/CompilerContext.h
index af5230bd..583360ea 100644
--- a/libsolidity/codegen/CompilerContext.h
+++ b/libsolidity/codegen/CompilerContext.h
@@ -56,6 +56,8 @@ public:
 			m_runtimeSub = size_t(m_asm->newSub(m_runtimeContext->m_asm).data());
 	}
 
+	void setExperimentalFeatures(std::set<ExperimentalFeature> const& _features) { m_experimentalFeatures = _features; }
+	bool experimentalFeatureActive(ExperimentalFeature _feature) const { return m_experimentalFeatures.count(_feature); }
 
 	void addStateVariable(VariableDeclaration const& _declaration, u256 const& _storageOffset, unsigned _byteOffset);
 	void addVariable(VariableDeclaration const& _declaration, unsigned _offsetToCurrent = 0);
@@ -264,6 +266,8 @@ private:
 	} m_functionCompilationQueue;
 
 	eth::AssemblyPointer m_asm;
+	/// Activated experimental features.
+	std::set<ExperimentalFeature> m_experimentalFeatures;
 	/// Other already compiled contracts to be used in contract creation calls.
 	std::map<ContractDefinition const*, eth::Assembly const*> m_compiledContracts;
 	/// Storage offsets of state variables
diff --git a/libsolidity/codegen/CompilerUtils.cpp b/libsolidity/codegen/CompilerUtils.cpp
index d2dab7d7..a0fc5d55 100644
--- a/libsolidity/codegen/CompilerUtils.cpp
+++ b/libsolidity/codegen/CompilerUtils.cpp
@@ -181,10 +181,13 @@ void CompilerUtils::encodeToMemory(
 		t = t->mobileType()->interfaceType(_encodeAsLibraryTypes)->encodingType();
 	}
 
-	bool activateNewEncoder = false;
 	if (_givenTypes.empty())
 		return;
-	else if (activateNewEncoder && _padToWordBoundaries && !_copyDynamicDataInPlace)
+	else if (
+		_padToWordBoundaries &&
+		!_copyDynamicDataInPlace &&
+		m_context.experimentalFeatureActive(ExperimentalFeature::ABIEncoderV2)
+	)
 	{
 		// Use the new JULIA-based encoding function
 		auto stackHeightBefore = m_context.stackHeight();
diff --git a/libsolidity/codegen/ContractCompiler.cpp b/libsolidity/codegen/ContractCompiler.cpp
index fd0998d4..29a22fae 100644
--- a/libsolidity/codegen/ContractCompiler.cpp
+++ b/libsolidity/codegen/ContractCompiler.cpp
@@ -100,6 +100,7 @@ void ContractCompiler::initializeContext(
 	map<ContractDefinition const*, eth::Assembly const*> const& _compiledContracts
 )
 {
+	m_context.setExperimentalFeatures(_contract.sourceUnit().annotation().experimentalFeatures);
 	m_context.setCompiledContracts(_compiledContracts);
 	m_context.setInheritanceHierarchy(_contract.annotation().linearizedBaseContracts);
 	CompilerUtils(m_context).initialiseFreeMemoryPointer();