[PATCH] D56246: [X86] Add post-isel peephole to fold KAND+KORTEST into KTEST if only the zero flag is used.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, spatel, andreadb.

Doing this late so we will prefer to fold the AND into a masked comparison first. That can be better for the live range of the mask register.


Repository:
  rL LLVM

https://reviews.llvm.org/D56246

Files:
  lib/Target/X86/X86ISelDAGToDAG.cpp
  test/CodeGen/X86/avx512-mask-op.ll

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