[llvm] [RFC] implement convergence control in MIR using SelectionDAG (PR #71785)

[Matt Arsenault via llvm-commits]

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@@ -1191,6 +1191,21 @@ EmitMachineNode(SDNode *Node, bool IsClone, bool IsCloned,
     }
   }
 
+  if (Opc == TargetOpcode::CONVERGENCECTRL_GLUE) {
+    MIB->getOperand(0).setIsKill(false);
+  }
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arsenm wrote:

Where did the killed come from? Something in InstrEmitter is incorrectly setting it 

https://github.com/llvm/llvm-project/pull/71785