If getInstance returns an instance of object class, and object is an instance itself, then it doesn't make sense or it is not a singleton.
You can think it like this: if object class has one unique instance, then object == object->getInstance(), so in your case either object != object->getInstance and they are from the same class (hence it is not a singleton) or they are from different classes (once again then, it is not a singleton).
If getInstance returns an instance of object class, and object is an instance itself, then it doesn't make sense or it is not a singleton.
You can think it like this: if object class has one unique instance, then object == object->getInstance(), so in your case either object != object->getInstance and they are from the same class (hence it is not a singleton) or they are from different classes (once again then, it is not a singleton).