[Bug tree-optimization/126257] [16/17 Regression] wrong code at -O2/3 with _BitInt(2) since r16-5324

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126257

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 65040
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65040&action=edit
gcc17-pr1262257.patch

Untested fix.