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

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis requested changes to this pull request.

Can you please add the sleef tests as well, in
- replace-with-veclib-sleef-scalable.ll
- replace-with-veclib-sleef.ll

This should be the equivalent you did for ArmPL (replace-with-veclib-armpl.ll).


Regarding the TLI mappings, the symbols do exist in the libraries SLEEF and ArmPL (libsleefgnuabi.so and libamath.so respectively).

The code changes look reasonable to me as well, but no strong opinion on areas I haven't touched (fast/global isels, darwin changes).

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