[llvm] SLPVectorizer: vectorize lrint, llrint (PR #69945)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> Any chance you could add some Analysis/CostModel/XXX/ test coverage please?

I already added it in #66924. See https://github.com/llvm/llvm-project/pull/66924/files#diff-7a095b9cb54a5f064065524b233fea89606804a2426e81365757a410c6441b53.

https://github.com/llvm/llvm-project/pull/69945