Emit the build attribute describing how the r9 register is to be treated, (i.e. as V6 or not at all).
Thanks for looking at this Saleem;
I've updated the enum name and added the remaining two as you suggested, and dropped a todo for properly passing this from the frontend.
Aligning the comments would be nice.
The comments are now aligned.
Closed by commit rL213944 (authored by @aemerson).