[llvm] [DAG] computeKnownFPClass - add ISD::SPLAT_VECTOR handling (PR #189780)

[Kartik Ohlan via llvm-commits]

Ko496-glitch wrote:

> > LGTM - cheers
> 
> Thanks !! i will create the PR for FMIN/MAX shortly :)

I like how supportive clang/llvm community is !

https://github.com/llvm/llvm-project/pull/189780