[flang-commits] [llvm] [libcxx] [lldb] [clang] [lld] [flang] [compiler-rt] [clang-tools-extra] [libc] [AMDGPU] Use alias info to relax waitcounts for LDS DMA (PR #74537)

[Jay Foad via flang-commits]

jayfoad wrote:

How does this work in a case like this?
```
call void @llvm.amdgcn.raw.buffer.load.lds(<4 x i32> %rsrc, ptr addrspace(3) @lds.3, i32 4, i32 0, i32 0, i32 0, i32 0)
call void @llvm.amdgcn.raw.buffer.load.lds(<4 x i32> %rsrc, ptr addrspace(3) %ptr, i32 4, i32 0, i32 0, i32 0, i32 0)
%val.3 = load float, ptr addrspace(3) @lds.3, align 4
```
i.e.
- store to known lds address `@lds.3` (this will use slot 0 and another slot e.g. slot 3?)
- store to unknown lds address (this will use slot 0?)
- load from known lds address `@lds.3` (this will use slot 3?)

https://github.com/llvm/llvm-project/pull/74537