[llvm] [LV] Optimise latch exit induction users for some early exit loops (PR #128880)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

IIUC the patch moves the existing code to compute the end value to a helper and uses it for all exits from the latch. Would be good to make that clear in the patch description to describe the patch.

https://github.com/llvm/llvm-project/pull/128880