[PATCH] Don't unroll loops in loop vectorization pass when VF is one.

[hfinkel at anl.gov]

In http://reviews.llvm.org/D9007#166472, @wmi wrote:

> Sorry, my bad. I mistakenly used the review number here in another
>  commit. This patch is still pending for review.


Okay, can you please repost with the correct summary?

> Wei.





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