[llvm] [AMDGPU][gfx1250] Implement SIMemoryLegalizer (PR #154726)

[Pierre van Houtryve via llvm-commits]

Pierre-vh wrote:

### Merge activity

* **Sep 10, 8:16 AM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/154726).


https://github.com/llvm/llvm-project/pull/154726