================
@@ -20257,7 +20257,11 @@ static void DoMarkVarDeclReferenced(
   bool UsableInConstantExpr =
       Var->mightBeUsableInConstantExpressions(SemaRef.Context);
 
-  if (Var->isLocalVarDeclOrParm() && !Var->hasExternalStorage()) {
+  bool ShouldTrackForUnusedButSet = Var->isStaticFileVar() &&
+                                    !Var->isStaticDataMember() &&
+                                    !Var->getType()->isFunctionPointerType();
----------------
zwuis wrote:

Why variables with function pointer type and static data members are handled 
specially? Are there any other bugs in our implementation?

https://github.com/llvm/llvm-project/pull/178342
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