This patch makes "&Cls::purevfn" not an odr use. This isn't what the standard
says, but that's a defect (to be filed). "Cls::purevfn()" is still an odr use.

Also fixes a bug that caused us to not mark the function referenced just
because we didn't want to mark it odr used.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174242 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateVariadic.cpp b/lib/Sema/SemaTemplateVariadic.cpp
index bb20913..470896e 100644
--- a/lib/Sema/SemaTemplateVariadic.cpp
+++ b/lib/Sema/SemaTemplateVariadic.cpp
@@ -844,7 +844,7 @@
     return ExprError();
   }
 
-  MarkAnyDeclReferenced(OpLoc, ParameterPack);
+  MarkAnyDeclReferenced(OpLoc, ParameterPack, true);
 
   return new (Context) SizeOfPackExpr(Context.getSizeType(), OpLoc, 
                                       ParameterPack, NameLoc, RParenLoc);