[PATCH] D63163: [GlobalISel][AArch64] Fold G_SUB into G_ICMP when it's safe to do so

[Jessica Paquette via Phabricator via llvm-commits]

paquette updated this revision to Diff 204849.
paquette added a comment.

- `tryFoldCMN` -> `tryOptCMN`
- Make `tryOptCMN` single-exit
- Make `tryOptCMN` not leave the G_ICMP in a half-selected state; now it selects the CMN entirely.
- Factor out cset emission into `emitCSet`.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D63163/new/

https://reviews.llvm.org/D63163

Files:
  llvm/lib/Target/AArch64/AArch64InstructionSelector.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/opt-fold-cmn.mir

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