[llvm-branch-commits] [AMDGPU] Baseline test for ptrtoaddr in lower-buffer-fat-pointers (PR #143812)

[Alexander Richardson via llvm-branch-commits]

https://github.com/arichardson created https://github.com/llvm/llvm-project/pull/143812

We should only be extracting the 32-bit offset in the ptrtoaddr case.