[llvm] [X86] Adding lowerings for vector ISD::LRINT and ISD::LLRINT (PR #90065)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

> What I gather is that you've added support for lowering vector [l]lrint for AVX. Further, it seems AVX can only pack vectors with i64. Please mention these in the commit subject and body. Otherwise, I'd like a clarification on the MVT you've matched.

Added the relationship in description, thanks!

https://github.com/llvm/llvm-project/pull/90065