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

[Vedant Paranjape via llvm-commits]

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@@ -610,13 +610,78 @@ 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) {
+      Type *PtrTy = PtrArg->getType();
+      Align PtrAlign = PtrArg->getPointerAlignment(DL);
+      APInt Offset(DL.getIndexTypeSizeInBits(PtrArg->getType()), 0);
+      PtrArg = PtrArg->stripAndAccumulateConstantOffsets(
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vedantparanjape-amd wrote:

Done

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