Cache functions by name.

Author: chriseth

libsolidity/ast/AST.cpp

@@ -276,6 +276,17 @@ FunctionDefinition const* ContractDefinition::nextConstructor(ContractDefinition
 	return nullptr;
 }
 
+multimap<std::string, FunctionDefinition const*> const& ContractDefinition::definedFunctionsByName() const
+{
+	return m_definedFunctionsByName.init([&]{
+		std::multimap<std::string, FunctionDefinition const*> result;
+		for (FunctionDefinition const* fun: filteredNodes<FunctionDefinition>(m_subNodes))
+			result.insert({fun->name(), fun});
+		return result;
+	});
+}
+
+
 TypeNameAnnotation& TypeName::annotation() const
 {
 	return initAnnotation<TypeNameAnnotation>();
@@ -397,6 +408,7 @@ FunctionDefinition const& FunctionDefinition::resolveVirtual(
 ) const
 {
 	solAssert(!isConstructor(), "");
+	solAssert(!name().empty(), "");
 	// If we are not doing super-lookup and the function is not virtual, we can stop here.
 	if (_searchStart == nullptr && !virtualSemantics())
 		return *this;
@@ -412,10 +424,8 @@ FunctionDefinition const& FunctionDefinition::resolveVirtual(
 		if (_searchStart != nullptr && c != _searchStart)
 			continue;
 		_searchStart = nullptr;
-		for (FunctionDefinition const* function: c->definedFunctions())
+		for (FunctionDefinition const* function: c->definedFunctions(name()))
 			if (
-				function->name() == name() &&
-				!function->isConstructor() &&
 				FunctionType(*function).asExternallyCallableFunction(false)->hasEqualParameterTypes(*functionType)
 			)
 				return *function;

libsolidity/ast/AST.h

@@ -36,6 +36,9 @@
 
 #include <json/json.h>
 
+#include <range/v3/view/subrange.hpp>
+#include <range/v3/view/map.hpp>
+
 #include <memory>
 #include <optional>
 #include <string>
@@ -497,6 +500,13 @@ class ContractDefinition: public Declaration, public StructurallyDocumented, pub
 	std::vector<VariableDeclaration const*> stateVariables() const { return filteredNodes<VariableDeclaration>(m_subNodes); }
 	std::vector<ModifierDefinition const*> functionModifiers() const { return filteredNodes<ModifierDefinition>(m_subNodes); }
 	std::vector<FunctionDefinition const*> definedFunctions() const { return filteredNodes<FunctionDefinition>(m_subNodes); }
+	/// @returns a view<FunctionDefinition const*> of all functions
+	/// defined in this contract of the given name (excluding inherited functions).
+	auto definedFunctions(std::string const& _name) const
+	{
+		auto&& [b, e] = definedFunctionsByName().equal_range(_name);
+		return ranges::subrange<decltype(b)>(b, e) | ranges::views::values;
+	}
 	std::vector<EventDefinition const*> events() const { return filteredNodes<EventDefinition>(m_subNodes); }
 	std::vector<EventDefinition const*> const& interfaceEvents() const;
 	/// @returns all errors defined in this contract or any base contract
@@ -546,13 +556,16 @@ class ContractDefinition: public Declaration, public StructurallyDocumented, pub
 	FunctionDefinition const* nextConstructor(ContractDefinition const& _mostDerivedContract) const;
 
 private:
+	std::multimap<std::string, FunctionDefinition const*> const& definedFunctionsByName() const;
+
 	std::vector<ASTPointer<InheritanceSpecifier>> m_baseContracts;
 	std::vector<ASTPointer<ASTNode>> m_subNodes;
 	ContractKind m_contractKind;
 	bool m_abstract{false};
 
 	util::LazyInit<std::vector<std::pair<util::FixedHash<4>, FunctionTypePointer>>> m_interfaceFunctionList[2];
 	util::LazyInit<std::vector<EventDefinition const*>> m_interfaceEvents;
+	util::LazyInit<std::multimap<std::string, FunctionDefinition const*>> m_definedFunctionsByName;
 };
 
 /**