[llvm] [DAGCombiner] Attempt to fold 'add' nodes to funnel-shift or rotate (PR #125612)

[Artem Belevich via llvm-commits]

Artem-B wrote:

> The diff on the tests should be viewable within this commit https://github.com/llvm/llvm-project/commit/0f8aef9a5f15d389e24e30e7cd5592fb474eec1e. Does that work?

Yes, I can see test diffs now. That looks like a very nice improvement across all tested platforms.

https://github.com/llvm/llvm-project/pull/125612