[llvm] [Coroutines][LazyCallGraph] resumes are not really SCC (PR #116285)

[Arthur Eubanks via llvm-commits]

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@@ -1720,6 +1720,7 @@ void LazyCallGraph::addSplitRefRecursiveFunctions(
   for (Function *NewFunction : NewFunctions) {
     Node &NewN = initNode(*NewFunction);
 
+    // Make the original function reference each new function
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aeubanks wrote:

this sounds exactly like what the inliner does [here](https://github.com/llvm/llvm-project/blob/504f6ce0c25b5cd721622cd444e9c428f400fd73/llvm/lib/Transforms/IPO/Inliner.cpp#L494) where we update the call graph after simplifying a function in a CGSCC pass. I'm still trying to understand if that's actually the proper solution

https://github.com/llvm/llvm-project/pull/116285