https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124808
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- Note that loop header copying is what does "loop rotation", but I think the issue is that the loop exit is reachable only if i>>3 >= 7, and we have failed to eliminate one IV with the other. The full testcase might show actual work done in the else case of course.
