[Bug middle-end/102395] [nvptx, vax] enum reg_class inferred as signed / unsigned

[jbglaw--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102395

--- Comment #8 from Jan-Benedict Glaw <jbg...@lug-owl.de> ---
Autobuilder also picked it, fixed for all.