[PATCH] Vectorize intrinsic math function calls in SLPVectorizer

[Nadav Rotem]

Hi Karthik, 

I read your patch and I noticed that you moved lots of code into VectorUtils.h.  Please split your patch to two parts: 1. the part where you move code around and 2. the part where you add new functionality to the vectorizer. This will make the task of reviewing the patch much easier. 

Thanks,
Nadav

http://reviews.llvm.org/D3535