[Mlir-commits] [mlir] [mlir][AMDGPU] Improve amdgpu.lds_barrier, add warnings (PR #77942)

[Matt Arsenault]

https://github.com/arsenm approved this pull request.

This is still worse than if we finally got the MMRAs to implement this correctly 

https://github.com/llvm/llvm-project/pull/77942