[PATCH] Refactor code for adding runtime checks in vectorizer.

[Michael Zolotukhin]

Hi Hal,

I uploaded the first (biggest) part to phabricator in http://reviews.llvm.org/D10097 - hope this helps with review.
The other 3 parts should be trivial, so I didn't upload them.

Thanks,
Michael


http://reviews.llvm.org/D9332

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