[llvm] ValueTracking: introduce llvm::isNotCrossLaneOperation (PR #112011)

[Nikita Popov via llvm-commits]

nikic wrote:

> Naming wise, isNotLaneCrossingOperation seems like a double negative. I believe we've called this lane or element wise operations elsewhere, maybe isLanewiseOperation would be better?

See this comment thread: https://github.com/llvm/llvm-project/pull/112011#discussion_r1797702539

https://github.com/llvm/llvm-project/pull/112011