[llvm] [X86] Support lowering of FMINIMUMNUM/FMAXIMUMNUM (PR #121464)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

> > @arsenm I saw 3 failures in check-all, could you please take a look? Thanks!
> > ```
> > Failed Tests (3):
> >   LLVM :: CodeGen/AArch64/fp-maximumnum-minimumnum.ll
> >   LLVM :: CodeGen/AMDGPU/maximumnum.ll
> >   LLVM :: CodeGen/AMDGPU/minimumnum.ll
> > ```
> 
> What happens to the codegen if you regenerate the checks?

https://github.com/llvm/llvm-project/pull/121464/commits/3760fc61e859dd8309beb3d6ac0a77a5377f6ce0

https://github.com/llvm/llvm-project/pull/121464