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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, 138 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/25_algorithms/iter_swap/20577.cc b/libstdc++-v3/testsuite/25_algorithms/iter_swap/20577.cc
new file mode 100644
index 000000000..ee084eb97
--- /dev/null
+++ b/libstdc++-v3/testsuite/25_algorithms/iter_swap/20577.cc
@@ -0,0 +1,70 @@
+// Copyright (C) 2005, 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 <algorithm>
+#include <vector>
+#include <testsuite_hooks.h>
+
+void
+test1()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::vector<bool> v;
+  v.push_back(true);
+  v.push_back(false);
+  std::iter_swap(v.begin(), v.begin() + 1);
+  VERIFY( v[0] == false && v[1] == true );
+}
+
+void
+test2()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::vector<int> v;
+  v.push_back(1);
+  v.push_back(2);
+  std::iter_swap(v.begin(), v.begin() + 1);
+  VERIFY( v[0] == 2 && v[1] == 1 );
+}
+
+int int_swap_count;
+
+struct X {};
+void swap(X&, X&)
+{ ++int_swap_count; }
+
+void
+test3()
+{
+  bool test __attribute__((unused)) = true;
+
+  int_swap_count = 0;
+  X i, j;
+  std::iter_swap(&i, &j);
+  VERIFY( int_swap_count == 1 );
+}
+
+// libstdc++/20577
+int main()
+{
+  test1();
+  test2();
+  test3();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/25_algorithms/iter_swap/requirements/explicit_instantiation/2.cc b/libstdc++-v3/testsuite/25_algorithms/iter_swap/requirements/explicit_instantiation/2.cc
new file mode 100644
index 000000000..822c69ccf
--- /dev/null
+++ b/libstdc++-v3/testsuite/25_algorithms/iter_swap/requirements/explicit_instantiation/2.cc
@@ -0,0 +1,34 @@
+// { dg-do compile }
+
+// 2007-09-20 Benjamin Kosnik <bkoz@redhat.com>
+
+// Copyright (C) 2007, 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 <algorithm>
+#include <testsuite_api.h>
+
+namespace std
+{
+  using __gnu_test::NonDefaultConstructible;
+
+  typedef NonDefaultConstructible 		value_type;
+  typedef value_type* 		iterator_type;
+
+  template void iter_swap(iterator_type, iterator_type);
+} 
diff --git a/libstdc++-v3/testsuite/25_algorithms/iter_swap/requirements/explicit_instantiation/pod.cc b/libstdc++-v3/testsuite/25_algorithms/iter_swap/requirements/explicit_instantiation/pod.cc
new file mode 100644
index 000000000..b7e4a16ba
--- /dev/null
+++ b/libstdc++-v3/testsuite/25_algorithms/iter_swap/requirements/explicit_instantiation/pod.cc
@@ -0,0 +1,34 @@
+// { dg-do compile }
+
+// 2007-09-20 Benjamin Kosnik <bkoz@redhat.com>
+
+// Copyright (C) 2007, 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 <algorithm>
+#include <testsuite_character.h>
+
+namespace std
+{
+  using __gnu_test::pod_int;
+
+  typedef pod_int 		value_type;
+  typedef value_type* 		iterator_type;
+
+  template void iter_swap(iterator_type, iterator_type);
+}