[Bug tree-optimization/127965] [14/15/16/17 Regression] wrong code with __atomic_fetch_or since r13-3760

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127965

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 65892
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65892&action=edit
gcc17-pr127965.patch

Untested fix.