ping [patch] Autovectorization loop versioning for data alignment

[Dorit Naishlos]

I'm pinging Keith's resubmission of his patch for loop versioning for data
alignment (cause he is on vacation):
http://gcc.gnu.org/ml/gcc-patches/2005-07/msg01786.html

(it's the last vectorizer item we were trying to incorporte into 4.1)

thanks,
dorit