[PATCH] D110177: [AArch64][SVE] Remove redundant PTEST following PNEXT/PFIRST

[Peter Waller via Phabricator via llvm-commits]

peterwaller-arm created this revision.
peterwaller-arm added reviewers: paulwalker-arm, sdesmalen, bsmith, efriedma, DavidTruby, MattDevereau.
Herald added subscribers: psnobl, hiraditya, kristof.beyls, tschuett.
peterwaller-arm requested review of this revision.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

PNEXT and PFIRST set the NZCV flags, so the subsequent PTEST can be
optimized away in AArch64InstrInfo::optimizePTestInstr.

See-also: https://reviews.llvm.org/D93292


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110177

Files:
  llvm/lib/Target/AArch64/SVEInstrFormats.td
  llvm/test/CodeGen/AArch64/sve-ptest-removal-pfirst.mir
  llvm/test/CodeGen/AArch64/sve-ptest-removal-pnext.mir

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