[llvm] [AMDGPU] Use alias info to relax waitcounts for LDS DMA (PR #74537)

[Matt Arsenault via llvm-commits]

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@@ -9084,7 +9084,9 @@ SDValue SITargetLowering::LowerINTRINSIC_VOID(SDValue Op,
     MachinePointerInfo LoadPtrI = LoadMMO->getPointerInfo();
 
     MachinePointerInfo StorePtrI = LoadPtrI;
-    StorePtrI.V = nullptr;
+    LoadPtrI.V = UndefValue::get(
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arsenm wrote:

PoisonValue

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