[llvm] [LLVM][ISel][AArch64 Remove AArch64ISD::FCM##z nodes. (PR #135817)

[Amara Emerson via llvm-commits]

https://github.com/aemerson approved this pull request.

Seems like a nice clean up. For at least the GISel part LGTM.

https://github.com/llvm/llvm-project/pull/135817