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

[Matt Arsenault via llvm-commits]

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@@ -629,10 +629,15 @@ def SI_CALL_ISEL : SPseudoInstSI <
 }
 
 def : GCNPat<
-  (AMDGPUcall i64:$src0, (i64 0)),
-  (SI_CALL_ISEL $src0, (i64 0))
+  (AMDGPUcall i64:$src0, (i64 0), untyped:$token),
+  (SI_CALL_ISEL $src0, (i64 0), untyped:$token)
 >;
 
+// def : GCNPat<
+//   (AMDGPUcall i64:$src0, (i64 0)),
+//   (SI_CALL_ISEL $src0, (i64 0), undef_tied_input)
+// >;
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arsenm wrote:

Commented out code

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