[clang] [llvm] [InstCombine] Combine llvm.sin/llvm.cos libcall pairs into llvm.sincos (PR #184760)

[Jan Patrick Lehr via cfe-commits]

jplehr wrote:

Is this an easy fix?
If not, I'd prefer to revert while this is being looked at.

https://github.com/llvm/llvm-project/pull/184760