https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116785
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> --- Note r15-792-gf0a02467bbc35a is a fix for correctness. I'm waiting for a better reduction - I'd suggest you reduce the function with the kernel itself manually and use creduce only to reduce the rest of the file.