https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71271
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-25
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Heh. I suppose the vectorizer could annotate the unvectorized loop copy with
some flag. But OTOH BB vectorization might end up partially vectorizing the
loop - it sounds hard to detect the case where it would be equivalent to
full loop vectorization.
So, confirmed. But as missed loop vectorization / unnecessary versioning for
aliasing. It's perfectly fine to SLP vectorize this w/o alias versioning.
