[clang] [llvm] Intrinsic: introduce minimumnum and maximumnum (PR #93841)

[YunQiang Su via cfe-commits]

wzssyqa wrote:

@peterwaller-arm I noticed that in `llvm/test/CodeGen/AArch64/combine_andor_with_cmps.ll`, `FMAXNUM_IEEE` is claimed that it is not supported. While I noticed that `fmaxnm` follows the rules of `maxNUM` of IEEE754-2008.
Is there any other limitation of `fmaxnm`?

https://github.com/llvm/llvm-project/pull/93841