https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91573
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- t5.c:10:5: missed: cost model: the vector iteration cost = 12372 divided by the scalar iteration cost = 236 is greater or equal to the vectorization factor = 16. t5.c:10:5: missed: not vectorized: vectorization not profitable. t5.c:10:5: missed: not vectorized: vector version will never be profitable. t5.c:10:5: missed: Loop costings may not be worthwhile. t5.c:10:5: missed: couldn't vectorize loop t5.c:6:6: note: vectorized 0 loops in function.