[Bug middle-end/125517] const folding for __builtin_bitreverse128 goes wrong

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125517

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 64603
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64603&action=edit
gcc17-pr125517.patch

Untested fix.