[llvm] [LV] Ensure VPInstruction::usesFirstLaneOnly behaves correctly for WidePtrAdd (PR #169344)

[David Sherwood via llvm-commits]

david-arm wrote:

> Hmm, for a scalar plan, we should probably not emit a wide pointer add in the first place I think?

I did wonder that, but I'm not familiar with this new WidePtrAdd and I think I also see normal ptr-add recipes too so it seemed to be at least consistent with that.

https://github.com/llvm/llvm-project/pull/169344