https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111683
--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Using wi::multiple_of_p is what I've tried first but that regressed the generated code for pr71083.c (the test still PASSed, but predcom no longer triggered on it). I think it has access size 3 and step 4, so step is not a multiple of access size, but that is not a problem, all we actually care about is just if access size isn't bigger than step.
