[llvm] [LV] Avoid redundant SCEVChecks on active lane mask (PR #171605)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> > Why don't we need the pointer overflow checks when we have an active lane mask?
> 
> MemChecks are still needed, and this patch doesn't change that?

Oh, you meant in SCEVChecks? Hm, not sure about the patch: I found a couple of cases where it was redundant while developing another patch, and tried to generalize.

https://github.com/llvm/llvm-project/pull/171605