diff --git a/clang/lib/AST/Type.cpp b/clang/lib/AST/Type.cpp
--- a/clang/lib/AST/Type.cpp
+++ b/clang/lib/AST/Type.cpp
@@ -2463,7 +2463,7 @@
 QualType Type::getRVVEltType(const ASTContext &Ctx) const {
   assert(isRVVVLSBuiltinType() && "unsupported type!");
 
-  const BuiltinType *BTy = getAs<BuiltinType>();
+  const BuiltinType *BTy = castAs<BuiltinType>();
   return Ctx.getBuiltinVectorTypeInfo(BTy).ElementType;
 }