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

[rguenth at gcc dot gnu.org]

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

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe we can simply set loop->force_vectorize on the prologue / epilogue loops.
Hmm, seems to be generated before we have a CFG ...