[llvm] [SLP]Fix gather of extractelements from different-sized vectors (PR #230664)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> IIRC SLP patches are already scanned by Archer? https://archer.top/

This is great! I had no idea, and I suspect many others have no idea as well. Maybe @cardigan1008 can consider notifications on the GitHub PR directly, so we get emails?

https://github.com/llvm/llvm-project/pull/230664