https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96921
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #4)
> Hmm, thinking about expanding this further:
Even further.
int f1(int n)
{
if (n&~8) __builtin_unreachable();
return 63 - n;
}
---- CUT ----
So the nonzero bits just need to be make sure they no non-overlapping bits.
