--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,77 @@
+// Copyright (C) 2020 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do run { target c++2a } }
+
+#include <algorithm>
+#include <memory>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+using __gnu_test::test_output_range;
+
+namespace ranges = std::ranges;
+
+template<typename Out, auto value>
+void
+test01()
+{
+    {
+      Out x[5];
+      ranges::uninitialized_fill_n(x, 5, value);
+      VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+    }
+
+    {
+      Out x[5];
+      test_output_range<Out> rx(x);
+      ranges::uninitialized_fill_n(x, 5, value);
+      VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+    }
+}
+
+int
+main()
+{
+  test01<char, 'a'>();
+  test01<char, 100>();
+  test01<char, 150>();
+  test01<char, 300>();
+  test01<char, 1000>();
+  test01<char, -10000L>();
+
+  test01<signed char, 'a'>();
+  test01<signed char, 100>();
+  test01<signed char, 150>();
+  test01<signed char, 300>();
+
+  test01<unsigned char, 'a'>();
+  test01<unsigned char, 100>();
+  test01<unsigned char, 150>();
+  test01<unsigned char, 300>();
+
+  test01<int, 'a'>();
+  test01<int, u8'a'>();
+  test01<int, (signed char)'a'>();
+  test01<int, (unsigned char)'a'>();
+
+  test01<volatile int, 'a'>();
+  test01<volatile int, 'a'>();
+  test01<volatile int, 500>();
+  test01<volatile char, 500>();
+}