[Bug tree-optimization/80844] OpenMP SIMD doesn't know how to efficiently zero a vector (its stores zeros and reloads)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80844

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What we should do is first vectorize the main simd loop and then, once we've
determined the vectorization factor thereof etc., see if there is any related
preparation and finalization loop around it and try to vectorize those with the
same vectorization factor.