Specialization of member descriptors only handles Py_T_OBJECT_EX but _Py_T_OBJECT seems more common #111772
Description
Despite _Py_T_OBJECT being marked as deprecated in descrobject.h it is commonly used in the standard library.
LOAD_ATTR_SLOT de-optimizes if the stored value is NULL. If the stored value is not NULL, both _Py_T_OBJECT and Py_T_OBJECT_EX act the same, so we can reuse LOAD_ATTR_SLOT for _Py_T_OBJECT.
For storing attributes, _Py_T_OBJECT and Py_T_OBJECT_EX are exactly the same.
I don't know why _Py_T_OBJECT is deprecated, the semantics seem quite reasonable.