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diff --git a/libstdc++-v3/testsuite/abi/demangle/regression/7986-09.cc b/libstdc++-v3/testsuite/abi/demangle/regression/7986-09.cc
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+++ b/libstdc++-v3/testsuite/abi/demangle/regression/7986-09.cc
@@ -0,0 +1,39 @@
+// 2003-02-26 Benjamin Kosnik <bkoz@redhat.com>
+
+// Copyright (C) 2003, 2009 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/>.
+
+// IA 64 C++ ABI - 5.1 External Names (a.k.a. Mangling)
+
+#include <testsuite_hooks.h>
+
+// libstdc++/7986
+int main()
+{
+  using namespace __gnu_test;
+
+ // cplus-dem FAIL
+  // Equivalent as considered order-insensitive?
+  // standard text, icc FAIL
+  //  verify_demangle("_ZlsRKU3fooU4bart1XS0_", 
+  //     "operator<<(X const foo bart&, X const foo bart)");
+  // new __cxa_demangle
+  verify_demangle("_ZlsRKU3fooU4bart1XS0_", 
+		  "operator<<(X bart foo const&, X bart)");
+
+  return 0;
+}