[PATCH] D18937: [X86][AVX512BW] Add support for v64i8 multiplies

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: delena, igorb.
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Extend the existing lowering of vXi8 multiplies to support v64i8 on avx512bw targets.

I added the Lower512IntArith helper function to help with this - not sure how often this could be used in the future, but it seemed better than putting all that logic inside LowerMUL.

Repository:
  rL LLVM

http://reviews.llvm.org/D18937

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/pmul.ll

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