[Bug tree-optimization/110982] (unsigned)(signed_char) != (unsigned)-1 is never changed back into signed_char != -1

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110982

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The basic issue is int_fits_type_p does not work the way folks think it works
for casting from signed to unsigned and then casting back ...