https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90796
--- Comment #11 from Michael Matz <matz at gcc dot gnu.org> --- (In reply to rguent...@suse.de from comment #10) > >It's the only affine functions that don't progress with each iteration. > > I > >think, at least :) > > Hm. At least we analyze wrapping ones, but I guess 0, 1, 0, 1 would be > caught in another way.. Yes, we analyze them, but for nothing. They aren't affine either, and hence result in unknown dependences.