https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111125
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
For gcc.dg/vect/bb-slp-29.c we are now vectorizing
#pragma GCC novector
for (i = 0; i < N/2; i++)
{
if (dst[i] != A * src[i] + B * src[i+1])
abort ();
}
in particular the multiplication and the addition (but not the load which
had predictive commoning applied). When cost modeling is enabled this
vectorization is not deemed profitable (but the vect testsuite runs with
-fno-vect-cost-model).
I wonder if we want to excempt basic blocks within loops marked with novector
from BB vectorization.
