Andrea Di Biagio bf4e625cf1 [X86] Teach how to combine AVX and AVX2 horizontal binop on packed 256-bit vectors.
This patch adds target combine rules to match:
 - [AVX] Horizontal add/sub of packed single/double precision floating point
   values from 256-bit vectors;
 - [AVX2] Horizontal add/sub of packed integer values from 256-bit vectors.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210761 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-12 10:53:48 +00:00
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