[llvm] LV: Expand llvm.histogram intrinsic to support umax, umin, and uadd.sat operations (PR #127399)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

thanks for the update! just a few more comments inline. It also needs updating to current main and check lines regenerating as currently tests fail on `main`

https://github.com/llvm/llvm-project/pull/127399