[llvm-branch-commits] [llvm] [AMDGPU][Attributor] Make `AAAMDWavesPerEU` honor existing attribute (PR #114438)

[Shilei Tian via llvm-branch-commits]

shiltian wrote:

### Merge activity

* **Dec 11, 4:38 PM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/114438).


https://github.com/llvm/llvm-project/pull/114438