[Bug middle-end/54571] Missed optimization converting between bit sets

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54571

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The `popcount(nz) == 1` comment part of PR 103216 will fix this issue.