================
@@ -3074,6 +3074,39 @@ following way:
 
 Query for this feature with ``__has_builtin(__builtin_offsetof)``.
 
+``__builtin_get_vtable_pointer``
+--------------------------------
+
+``__builtin_get_vtable_pointer`` loads and authenticates the primary vtable
+pointer from an instance of a polymorphic C++ class.
----------------
cor3ntin wrote:

Do we have general Ptrauth documentation we can cross-reference?

https://github.com/llvm/llvm-project/pull/139790
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