[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:

LazyCallGraph models the actual IR, so if there aren't any references in the actual IR, there shouldn't be an edge in LazyCallGraph. The LazyCallGraph APIs should be called after all transformations are done. I think I'm not fully understanding your comment, a concrete example would be helpful.

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