[clang] [clang] Lower non-builtin sincos[f|l] calls to llvm.sincos.* when -fno-math-errno is set (PR #121763)

[Matt Arsenault via cfe-commits]

https://github.com/arsenm requested changes to this pull request.

I'm a hard no on making this a target dependent option. Just enable it unconditionally and take the regression 

https://github.com/llvm/llvm-project/pull/121763