[PATCH] Add support to recognize non SIMD kind of parallelism in SLPVectorizer

[Karthik Bhat]

Hi Arnold,Nadav, 
Please find the lnt results with a sample size of 20. I did not observe any significant performance changes in lnt test cases but one of our internal test gave an improvement of ~5-6%.

{F70031}

Thanks for the time.

Regards
Karthik Bhat

http://reviews.llvm.org/D4015