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

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Andarwinux wrote:

Will this affect vector sin+cos? Currently sincos vectorization almost doesn't work, and I'm concerned if InstCombine combined sin and cos before vectorization, the workaround of using sin+cos won't work either.

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