[PATCH] D109850: Implement SystemZIselLowering::hasAndNot

[Matthias Braun via Phabricator via llvm-commits]

MatzeB created this revision.
MatzeB added reviewers: jnspaulsson, uweigand, neumannh.
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- SystemZ appears to have the `vnc` instruction producing an "and-not" effect. Therefore `SystemZIselLowering::hasAndNot` can return true.
- This led to different patterns generated for `abs` which are added here as well.

This change improves SystemZ codegen and will avoid code generation regressions with https://reviews.llvm.org/D109194


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109850

Files:
  llvm/lib/Target/SystemZ/SystemZISelLowering.h
  llvm/lib/Target/SystemZ/SystemZInstrVector.td
  llvm/test/CodeGen/SystemZ/vec-abs-01.ll
  llvm/test/CodeGen/SystemZ/vec-masked-merge.ll

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