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

[via llvm-commits]

RonDahan101 wrote:

> 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`

Rebased onto current main and regenerated the check lines — all LoopVectorize tests pass now. Sorry for the noise, premerge was green when it last ran so I didn't spot the drift.


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