[llvm] [AMDGPU][SIInsertWaitcnts] Wait on all LDS DMA operations when no aliasing store is found (PR #170660)

[Pierre van Houtryve via llvm-commits]

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@@ -223,6 +223,7 @@ define amdgpu_kernel void @buffer_load_lds_dword_10_arrays(<4 x i32> %rsrc, i32
 ; GFX9-NEXT:    s_waitcnt vmcnt(2)
 ; GFX9-NEXT:    ds_read_b32 v7, v9 offset:1792
 ; GFX9-NEXT:    ; wave barrier
+; GFX9-NEXT:    s_waitcnt vmcnt(0)
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Pierre-vh wrote:

Yes that's precisely what I was trying to fix. The wait is required here because we ran out of tracking slots.
#162077 increases the number of tracking slots so this will be improved

https://github.com/llvm/llvm-project/pull/170660