[Bug tree-optimization/125399] Missed optimization of __builtin_bitreverse8() when comparing to 0

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125399

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 64518
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64518&action=edit
gcc17-pr125399.patch

Untested fix.