[PATCH] D97303: [AArch64] Use CMTST for != 0 vector compares (vnot (CMEQz A)).

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: dmgreen, SjoerdMeijer, aemerson, paquette.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
fhahn requested review of this revision.
Herald added a project: LLVM.

(CMTST A, A) will only set elements to 0 if the element is 0 in A. Use
it for != 0 compares, which currently use (vnot (CMEQz A)). This saves a
mvn instruction.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D97303

Files:
  llvm/lib/Target/AArch64/AArch64InstrInfo.td
  llvm/test/CodeGen/AArch64/neon-compare-instructions.ll
  llvm/test/CodeGen/AArch64/vec_umulo.ll

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