pt.arange(int) has .type.shape set to None

[lucianopaz]

Description

I'm not sure why, but pt.arange(10).type.shape is (None,). Since the input args are constants, it could have the type shape already determined to be (10,).

[ricardoV94]

Yeah we can add. We didn't go through all the Ops when we added static shapes. Cumsum is another I came across recently