[llvm] [AMDGPU][SILoadStoreOptimizer] Try to find common base for L/Ss with 0 offset (PR #71126)

[Jeffrey Byrnes via llvm-commits]

jrbyrnes wrote:

> Maybe by precommitting the new test you added?

I put it in the PR commit stack since there are outstanding concerns with the test. 




https://github.com/llvm/llvm-project/pull/71126