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diff --git a/gcc-4.4.3/libstdc++-v3/testsuite/20_util/common_type/requirements/typedefs-1.cc b/gcc-4.4.3/libstdc++-v3/testsuite/20_util/common_type/requirements/typedefs-1.cc
new file mode 100644
index 000000000..94469d974
--- /dev/null
+++ b/gcc-4.4.3/libstdc++-v3/testsuite/20_util/common_type/requirements/typedefs-1.cc
@@ -0,0 +1,117 @@
+// { dg-options "-std=gnu++0x" }
+//
+// Copyright (C) 2008, 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/>.
+
+#include <type_traits>
+#include <testsuite_hooks.h>
+
+#define JOIN( X, Y ) DO_JOIN( X, Y )
+#define DO_JOIN( X, Y ) DO_JOIN2(X,Y)
+#define DO_JOIN2( X, Y ) X##Y
+
+#define COMMON_TYPE_TEST_1(type1, uid) \
+  typedef common_type<type1>::type JOIN(test_t,uid); \
+  VERIFY( (is_same<JOIN(test_t,uid), JOIN(test_t,uid)>::value) ); \
+  typedef common_type<const type1>::type JOIN(test_t,JOIN(uid,c)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,c)), \
+                   JOIN(test_t,JOIN(uid,c))>::value) ); \
+  typedef common_type<volatile type1>::type JOIN(test_t,JOIN(uid,v)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,v)), \
+                   JOIN(test_t,JOIN(uid,v))>::value) ); \
+  typedef common_type<const volatile type1>::type JOIN(test_t,JOIN(uid,cv)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,cv)), \
+                   JOIN(test_t,JOIN(uid,cv))>::value) ); \
+  typedef common_type<type1 &>::type JOIN(test_t,JOIN(uid,l)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,l)), \
+                   JOIN(test_t,JOIN(uid,l))>::value) ); \
+  typedef common_type<const type1 &>::type JOIN(test_t,JOIN(uid,lc)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,lc)), \
+                   JOIN(test_t,JOIN(uid,lc))>::value) ); \
+  typedef common_type<volatile type1 &>::type JOIN(test_t,JOIN(uid,lv)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,lv)), \
+                   JOIN(test_t,JOIN(uid,lv))>::value) ); \
+  typedef common_type<const volatile type1 &>::type JOIN(test_t,JOIN(uid,lcv)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,lcv)), \
+                   JOIN(test_t,JOIN(uid,lcv))>::value) ); \
+  typedef common_type<type1 &&>::type JOIN(test_t,JOIN(uid,r)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,r)), \
+                   JOIN(test_t,JOIN(uid,r))>::value) ); \
+  typedef common_type<const type1 &&>::type JOIN(test_t,JOIN(uid,rc)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,rc)), \
+                   JOIN(test_t,JOIN(uid,rc))>::value) ); \
+  typedef common_type<volatile type1 &&>::type JOIN(test_t,JOIN(uid,rv)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,rv)), \
+                   JOIN(test_t,JOIN(uid,rv))>::value) ); \
+  typedef common_type<const volatile type1 &&>::type JOIN(test_t,JOIN(uid,rcv)); \
+  VERIFY( (is_same<JOIN(test_t,JOIN(uid,rcv)), \
+                   JOIN(test_t,JOIN(uid,rcv))>::value) )
+    
+struct A { };
+struct B : A { };
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using std::common_type;
+  using std::is_same;
+
+  // Positive tests.
+  COMMON_TYPE_TEST_1(int, 1);
+  COMMON_TYPE_TEST_1(double, 2);
+  COMMON_TYPE_TEST_1(A, 3);
+  COMMON_TYPE_TEST_1(B, 4);
+}
+
+#define COMMON_TYPE_TEST_2_IMPL(type1, type2, type3, uid) \
+  typedef common_type<type1, type2>::type  	JOIN(JOIN(test, uid),_t1); \
+  typedef common_type<type2, type1>::type  	JOIN(JOIN(test, uid),_t2); \
+  VERIFY( (is_same<JOIN(JOIN(test, uid),_t1), type3>::value) ); \
+  VERIFY( (is_same<JOIN(JOIN(test, uid),_t2), type3>::value) )
+
+#define NO_CV
+  
+#define COMMON_TYPE_TEST_2(cv_qual, type1, type2, type3, uid) \
+  COMMON_TYPE_TEST_2_IMPL(cv_qual type1, type2, type3, uid); \
+  COMMON_TYPE_TEST_2_IMPL(cv_qual type1 &, type2, type3, JOIN(uid,l)); \
+  COMMON_TYPE_TEST_2_IMPL(cv_qual type1 &&, type2, type3, JOIN(uid,r))
+
+#define COMMON_TYPE_TEST_ALL_2(type1, type2, type3, uid) \
+  COMMON_TYPE_TEST_2(NO_CV, type1, type2, type3, uid); \
+  COMMON_TYPE_TEST_2(const, type1, type2, type3, uid); \
+  COMMON_TYPE_TEST_2(volatile, type1, type2, type3, uid); \
+  COMMON_TYPE_TEST_2(const volatile, type1, type2, type3, uid)
+
+void test02()
+{
+  bool test __attribute__((unused)) = true;
+  using std::common_type;
+  using std::is_same;
+  
+  COMMON_TYPE_TEST_ALL_2(int, int, int, 1);
+  COMMON_TYPE_TEST_ALL_2(int, double, double, 2);
+  COMMON_TYPE_TEST_2(NO_CV, A, A, A, 3);
+  COMMON_TYPE_TEST_2(const, A, A, const A, 4);
+  COMMON_TYPE_TEST_2(NO_CV, B, A, A, 5);  
+}
+
+int main()
+{
+  test01();
+  test02();
+  return 0;
+}