https://github.com/kazutakahirata created 
https://github.com/llvm/llvm-project/pull/233191

PointerUnion::dyn_cast has been soft-deprecated in favor of
llvm::dyn_cast and llvm::dyn_cast_if_present.  This patch replaces the
former with llvm::dyn_cast_if_present in
FriendTemplateDecl::getFriendDecl.

This is the only place under clang/ where migrating to llvm::dyn_cast
would trigger an assertion failure during check-clang.

Assisted-by: Antigravity


>From 928dadfb0e2325e16eb63306f35c58397496396d Mon Sep 17 00:00:00 2001
From: Kazu Hirata <[email protected]>
Date: Sat, 17 Oct 2026 22:09:55 -0700
Subject: [PATCH] [clang] Replace PointerUnion::dyn_cast with
 llvm::dyn_cast_if_present (NFC)

PointerUnion::dyn_cast has been soft-deprecated in favor of
llvm::dyn_cast and llvm::dyn_cast_if_present.  This patch replaces the
former with llvm::dyn_cast_if_present in
FriendTemplateDecl::getFriendDecl.

This is the only place under clang/ where migrating to llvm::dyn_cast
would trigger an assertion failure during check-clang.

Assisted-by: Antigravity
---
 clang/include/clang/AST/DeclTemplate.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/include/clang/AST/DeclTemplate.h 
b/clang/include/clang/AST/DeclTemplate.h
index 575ca86155742e..5724645602d9b3 100644
--- a/clang/include/clang/AST/DeclTemplate.h
+++ b/clang/include/clang/AST/DeclTemplate.h
@@ -2529,7 +2529,7 @@ class FriendTemplateDecl final
   }
 
   NamedDecl *getFriendDecl() const override {
-    if (NamedDecl *ND = Friend.dyn_cast<NamedDecl *>())
+    if (NamedDecl *ND = dyn_cast_if_present<NamedDecl *>(Friend))
       return ND;
     return Template.getAsTemplateDecl();
   }

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