[PATCH] [SLPVectorization] Enhance Ability to Vectorize Horizontal Reductions from Consecutive Loads

[suyog]

Reverted 224119 because floating point data types cannot be freely re-associated unless ffast-math specified.

Also modified this patch now to exchange left and right only for integer data type now.
Modified the test case to check vectorization for integer type and not for floating point data types.

Please help in reviewing the patch.

Regards,
Suyog


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D6675

Files:
  lib/Transforms/Vectorize/SLPVectorizer.cpp
  test/Transforms/SLPVectorizer/AArch64/horizontaladd.ll

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