https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64844
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|tree-optimization |target
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
t.c:8:5: note: === vect_update_slp_costs_according_to_vf ===
t.c:8:5: note: cost model: the vector iteration cost = 26 divided by the scalar
iteration cost = 10 is greater or equal to the vectorization factor = 2.
t.c:8:5: note: not vectorized: vectorization not profitable.
t.c:8:5: note: not vectorized: vector version will never be profitable.
t.c:8:5: note: bad operation or unsupported loop bound.
A cost model issue with cortex-a57. The cost model changed in GCC 5 for
cortex-a57. I think this is due to unaligned loads.
