https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101097
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Uroš Bizjak from comment #8) > (In reply to Hongtao.liu from comment #6) > > > > I just to want to classify the test is used to test another optimization > > which rely on either loop vectorization or slp. it means it's ok to add > > unroll pragma here. > > The code with new patterns is clearly less optimal, so I've had some second > thoughts... But clearly the code is better than when not vectorized at all which is what happens when the iteration count isn't exactly 4, 8, 12 or 16.
