[llvm] [ArgPromotion] Handle pointer arguments of recursive calls (PR #78735)

[Vedant Paranjape via llvm-commits]

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@@ -610,6 +658,48 @@ static bool findArgParts(Argument *Arg, const DataLayout &DL, AAResults &AAR,
       // unknown users
     }
 
+    auto *CB = dyn_cast<CallBase>(V);
+    Value *PtrArg = cast<Value>(U);
+    if (IsRecursive && CB && PtrArg) {
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vedantparanjape-amd wrote:

I had added a check to check if a function is self recursive, and not a chain of recursion (pr42028-recursion.ll). Does that seem okay?

https://github.com/llvm/llvm-project/pull/78735