Merge pull request #13406 from ethereum/slot_on_reference_fix

Fix `.slot` accessing via mapping reference in assembly

libsolidity/ast/Types.cpp

@@ -3789,6 +3789,11 @@ TypeResult MappingType::interfaceType(bool _inLibrary) const
 	return this;
 }
 
+std::vector<std::tuple<std::string, Type const*>> MappingType::makeStackItems() const
+{
+	return {std::make_tuple("slot", TypeProvider::uint256())};
+}
+
 string TypeType::richIdentifier() const
 {
 	return "t_type" + identifierList(actualType());

libsolidity/ast/Types.h

@@ -1528,6 +1528,8 @@ public:
 	bool hasSimpleZeroValueInMemory() const override { solAssert(false, ""); }
 	bool nameable() const override { return true; }
 
+	std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
+
 	Type const* keyType() const { return m_keyType; }
 	Type const* valueType() const { return m_valueType; }