================
@@ -178,6 +178,16 @@ void ProTypeVarargCheck::check(const 
MatchFinder::MatchResult &Result) {
   if (const auto *Matched = Result.Nodes.getNodeAs<CallExpr>("callvararg")) {
     if (hasSingleVariadicArgumentWithValue(Matched, 0))
       return;
+
+    // Skip builtins with custom type checking - they use variadics as an
+    // implementation detail to accept multiple types, not for C-style varargs.
+    if (const auto *FD = Matched->getDirectCallee()) {
+      if (const unsigned BuiltinID = FD->getBuiltinID()) {
----------------
mugiwaraluffy56 wrote:

@zeyi2 Done, thanks for the suggestion.

https://github.com/llvm/llvm-project/pull/178656
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