[PATCH] D28888: [AVX-512] Support ADD/SUB/MUL of mask vectors

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.

Currently we expand and scalarize these operations, but I think we should be able to implement ADD/SUB with KXOR and MUL with KAND.

We already do this for scalar i1 operations so I just extended it to vectors of i1.


https://reviews.llvm.org/D28888

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/avx512-mask-op.ll
  test/CodeGen/X86/avx512bw-mask-op.ll

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