[llvm] [AMDGPU] Support arbitrary types in amdgcn.dead (PR #134841)

[Matt Arsenault via llvm-commits]

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@@ -6629,6 +6629,11 @@ void SITargetLowering::ReplaceNodeResults(SDNode *N,
       Results.push_back(LoadVal);
       return;
     }
+    case Intrinsic::amdgcn_dead: {
+      for (unsigned I = 0, E = N->getNumValues(); I < E; ++I)
+        Results.push_back(DAG.getUNDEF(N->getValueType(I)));
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arsenm wrote:

poison? 

https://github.com/llvm/llvm-project/pull/134841