[llvm] [VectorCombine] Preserve scoped alias metadata (PR #153714)

[Frederik Harwath via llvm-commits]

frederik-h wrote:

> Hi @knwng, thanks! I haven't look at the patch in any detail. It does need a lit test though.

I have written a test that reproduces the issue: https://github.com/llvm/llvm-project/commit/13fa0d28cf3581a88057fa55ca1cd27886d2ba87.
@knwng I hope this helps as a starting point.

https://github.com/llvm/llvm-project/pull/153714