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

[Chang Lin via cfe-commits]

clin111 wrote:

Looks like it was never enabled --- or tested on X86 --- since UseAA was introduced in https://reviews.llvm.org/D67266. Eventually the dead option was removed with c266776. Would advise some caution with regards to register pressure and compile time.

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