[llvm] [AMDGPU] Handle lowering addrspace casts from LDS to FLAT address in amdgpu-sw-lower-lds. (PR #121214)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

This doesn't feel like a sound approach. What happens if the pointer value is captured in any way? 

https://github.com/llvm/llvm-project/pull/121214