I am doing some informal research into dynamic speech and narrative generation, and I've been looking into some local colloquialism and having a little bit of difficultly classifying a set of them. I would call them "super-contractions" or "a contraction of contractions". But I'm curious if there is a better word/phrase that represents them.

For example:

I am going to tell him that!
I'm going to tell him that!
I'm gonna' tell him that!
I'm'a tell him that!
Ima tell him that!