PR c++/85254

[Ville Voutilainen]

Tested on Linux-PPC64, acked by Jason on irc. Applying to trunk
on Saturday.

2019-06-01  Ville Voutilainen  <ville.voutilai...@gmail.com>

    gcc/cp

     PR c++/85254
    * class.c (fixup_type_variants): Handle CLASSTYPE_FINAL.

    testsuite/

     PR c++/85254
    * g++.dg/ext/is_final.C: Amend.

diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index a2585a6..d6ac6ce 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -1907,6 +1907,7 @@ fixup_type_variants (tree t)
 	= TYPE_HAS_NONTRIVIAL_DESTRUCTOR (t);
 
       TYPE_POLYMORPHIC_P (variants) = TYPE_POLYMORPHIC_P (t);
+      CLASSTYPE_FINAL (variants) = CLASSTYPE_FINAL (t);
 
       TYPE_BINFO (variants) = TYPE_BINFO (t);
 
diff --git a/gcc/testsuite/g++.dg/ext/is_final.C b/gcc/testsuite/g++.dg/ext/is_final.C
index b3875ad..20e5d62 100644
--- a/gcc/testsuite/g++.dg/ext/is_final.C
+++ b/gcc/testsuite/g++.dg/ext/is_final.C
@@ -43,3 +43,17 @@ static_assert( __is_final (Ff<int>), "Ff<int> is final" );
 static_assert( __is_final (Ff<A>),   "Ff<A> is final" );
 static_assert( __is_final (Ff<Af>),  "Ff<Af> is final" );
 
+// PR 85254
+
+template <class T> struct final_trait_wrap{ typedef T type; };
+
+template <class T> struct my_is_final
+{
+  static const bool value = __is_final(typename final_trait_wrap<T>::type);
+};
+
+struct final1 final {};
+template <typename T> struct final2 final {};
+
+static_assert( my_is_final<final1>::value, "final1 is final" );
+static_assert( my_is_final<final2<int>>::value, "final2<int> is final" );