https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102571
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 51554 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51554&action=edit gcc12-pr102571.patch Untested patch for the OpenMP optimization that will result in this bug not triggering for OpenMP, but it will still trigger for when the user uses __builtin_clear_padding and __builtin_memcmp by hand (or eventually through <atomic>).