obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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3 files changed, 162 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/26_numerics/complex/cons/48760.cc b/libstdc++-v3/testsuite/26_numerics/complex/cons/48760.cc
new file mode 100644
index 000000000..0027a34e4
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/complex/cons/48760.cc
@@ -0,0 +1,58 @@
+// { dg-require-c-std "" }
+
+// Copyright (C) 2011 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 <complex>
+#include <limits>
+#include <testsuite_hooks.h>
+
+template<typename T>
+  void do_test01()
+  {
+    bool test __attribute__((unused)) = true;
+
+    if (std::numeric_limits<T>::has_quiet_NaN)
+      {
+	std::complex<T> c1(T(0), std::numeric_limits<T>::quiet_NaN());
+	VERIFY( c1.real() == T(0) );
+	VERIFY( std::isnan(c1.imag()) );
+
+	std::complex<T> c2(std::numeric_limits<T>::quiet_NaN(), T(0));
+	VERIFY( std::isnan(c2.real()) );
+	VERIFY( c2.imag() == T(0) );
+
+	std::complex<T> c3(std::numeric_limits<T>::quiet_NaN(),
+			   std::numeric_limits<T>::quiet_NaN());
+	VERIFY( std::isnan(c3.real()) );
+	VERIFY( std::isnan(c3.imag()) );
+      }
+  }
+
+// libstdc++/48760
+void test01()
+{
+  do_test01<float>();
+  do_test01<double>();
+  do_test01<long double>();
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/complex/cons/constexpr.cc b/libstdc++-v3/testsuite/26_numerics/complex/cons/constexpr.cc
new file mode 100644
index 000000000..13d3c8168
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/complex/cons/constexpr.cc
@@ -0,0 +1,37 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2010 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 <complex>
+#include <testsuite_common_types.h>
+
+int main()
+{
+  __gnu_test::constexpr_default_constructible test1;
+  test1.operator()<std::complex<float>>();
+  test1.operator()<std::complex<double>>();
+  test1.operator()<std::complex<long double>>();
+
+  __gnu_test::constexpr_single_value_constructible test2;
+  test2.operator()<std::complex<float>, float>();
+  test2.operator()<std::complex<double>, double>();
+  test2.operator()<std::complex<long double>, long double>();
+
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/26_numerics/complex/cons/constexpr_primary.cc b/libstdc++-v3/testsuite/26_numerics/complex/cons/constexpr_primary.cc
new file mode 100644
index 000000000..77e01bcff
--- /dev/null
+++ b/libstdc++-v3/testsuite/26_numerics/complex/cons/constexpr_primary.cc
@@ -0,0 +1,67 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++0x" }
+
+// Copyright (C) 2010 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 <complex>
+
+// User defined type, so that the primary std::complex template is used.
+namespace numext
+{
+  struct ldld_base
+  {
+    long double one;
+    long double two;
+  };
+
+  struct ldld_lit : public ldld_base
+  { };
+
+  struct ldld_nonlit : public ldld_base
+  {
+    ~ldld_nonlit() { }
+  };
+
+  bool
+  operator<(const ldld_base __a, const ldld_base __b)
+  { return __a.one < __b.one && __a.two < __b.two; }
+
+  bool
+  operator==(const ldld_base __a, const ldld_base __b)
+  { return __a.one == __b.one && __a.two == __b.two; }
+
+  ldld_base
+  operator+=(const ldld_base __a, const ldld_base __b)
+  { return ldld_base({ __a.one + __b.one, __a.two + __b.two}); }
+
+  ldld_base
+  operator-=(const ldld_base __a, const ldld_base __b)
+  { return ldld_base({ __a.one - __b.one, __a.two - __b.two}); }
+
+  ldld_base
+  operator*=(const ldld_base __a, const ldld_base __b)
+  { return ldld_base({ __a.one * __b.one, __a.two * __b.two}); }
+
+  ldld_base
+  operator/=(const ldld_base __a, const ldld_base __b)
+  { return ldld_base({ __a.one / __b.one, __a.two / __b.two}); }
+
+}
+
+constexpr std::complex<numext::ldld_lit> lit; // ok
+// constexpr std::complex<numext::ldld_nonlit> nonlit; // error