[llvm] [arm64] Add tan intrinsic lowering (PR #94545)

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis approved this pull request.

@farzonl thanks a lot for adding the replace-with-veclib SLEEF tests. LGTM.

https://github.com/llvm/llvm-project/pull/94545