[llvm] [AMDGPU] Relax lds dma waitcnt with no aliasing pair (PR #131842)

[Pierre van Houtryve via llvm-commits]

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@@ -1748,7 +1753,7 @@ bool SIInsertWaitcnts::generateWaitcntInstBefore(MachineInstr &MI,
             }
           }
         }
-        if (!FoundAliasingStore)
+        if (!FoundAliasingStore && !RelaxLDSDMA)
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Pierre-vh wrote:

Can you add a testcase for it too, please?

https://github.com/llvm/llvm-project/pull/131842