[PATCH] [SLPVectorizer] Reorder operands of shufflevector if it can result in a vectorized code.

[Karthik Bhat]

Hi Michael,
Thanks for the review. Please find the updated patch and my comments inline.
Please let me know if this is good to commit.
Thanks and Regards
Karthik Bhat


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D6677

Files:
  lib/Transforms/Vectorize/SLPVectorizer.cpp
  test/Transforms/SLPVectorizer/X86/addsub.ll
  test/Transforms/SLPVectorizer/X86/operandorder.ll

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