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
directory might differ from line-endings of the respective
files in the upstream repository.

3 files changed, 252 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.cc b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.cc
new file mode 100644
index 000000000..6b46402fe
--- /dev/null
+++ b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.cc
@@ -0,0 +1,68 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 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/>.
+
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file elapsed_timer.cpp
+ * Contains utilities for tests.
+ */
+
+#include <util/performance/time/elapsed_timer.hpp>
+
+namespace __gnu_pbds
+{
+
+  namespace test
+  {
+
+    elapsed_timer::
+    elapsed_timer()
+    {
+      reset();
+    }
+
+    void
+    elapsed_timer::
+    reset()
+    {
+      m_start = ::clock();
+    }
+
+    elapsed_timer::
+    operator double() const
+    {
+      const clock_t now = ::clock();
+
+      return (((double)now - m_start) / CLOCKS_PER_SEC);
+    }
+
+  } // namespace test
+
+} // namespace __gnu_pbds
diff --git a/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.hpp b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.hpp
new file mode 100644
index 000000000..5f7937b92
--- /dev/null
+++ b/libstdc++-v3/testsuite/util/performance/time/elapsed_timer.hpp
@@ -0,0 +1,67 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 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/>.
+
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file elapsed_timer.hpp
+ * Contains time utilities for tests.
+ */
+
+#ifndef PB_DS_TEST_TIME_HPP
+#define PB_DS_TEST_TIME_HPP
+
+#include <time.h>
+#include <iosfwd>
+
+namespace __gnu_pbds
+{
+
+  namespace test
+  {
+
+    class elapsed_timer
+    {
+    public:
+      elapsed_timer();
+
+      void
+      reset();
+
+      operator double() const;
+
+    protected:
+      clock_t m_start;
+    };
+
+  } // namespace test
+
+} // namespace __gnu_pbds
+
+#endif // #ifndef PB_DS_TEST_TIME_HPP
diff --git a/libstdc++-v3/testsuite/util/performance/time/timing_test_base.hpp b/libstdc++-v3/testsuite/util/performance/time/timing_test_base.hpp
new file mode 100644
index 000000000..961583273
--- /dev/null
+++ b/libstdc++-v3/testsuite/util/performance/time/timing_test_base.hpp
@@ -0,0 +1,117 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 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/>.
+
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file timing_test_base.hpp
+ * Contains a base class for timing tests.
+ */
+
+#ifndef PB_DS_TIMING_TEST_BASE_HPP
+#define PB_DS_TIMING_TEST_BASE_HPP
+
+#include <performance/time/elapsed_timer.hpp>
+#include <statistic/result_recorder.hpp>
+
+namespace __gnu_pbds
+{
+  namespace test
+  {
+    namespace detail
+    {
+      class timing_test_base
+      {
+      protected:
+	template<typename Functor>
+	double
+	operator()(Functor& fn);
+
+	static double
+        min_time_res();
+
+      private:
+	template<typename Functor>
+	std::size_t
+	get_min_resolution(Functor&);
+
+	template<typename Functor>
+	double
+	run_at_resolution(Functor&, std::size_t);
+      };
+
+      template<typename Functor>
+      double
+      timing_test_base::operator()(Functor& fn)
+      {
+	const std::size_t resolution = get_min_resolution(fn);
+	__gnu_pbds::test::detail::result_recorder<double> rec;
+	double res;
+	do
+	  res = run_at_resolution(fn, resolution);
+	while (rec.add_result(res) == false);
+	res = rec.get_sample_mean() / resolution;
+	return res;
+      }
+
+      double
+      timing_test_base::min_time_res()
+      { return 1e-7; }
+
+      template<typename Functor>
+      std::size_t
+      timing_test_base::get_min_resolution(Functor& fn)
+      {
+	std::size_t guess = 0;
+	const double epsilon_val = min_time_res();
+	double res;
+	do
+	  {
+	    guess = guess * 2 + 1;
+	    res = run_at_resolution(fn, guess);
+	  }
+	while (res < epsilon_val);
+	return guess;
+      }
+
+      template<typename Functor>
+      double
+      timing_test_base::run_at_resolution(Functor& fn, std::size_t resolution)
+      {
+	elapsed_timer res;
+	fn(resolution);
+	return res;
+      }
+
+    } // namespace detail
+  } // namespace test
+} // namespace __gnu_pbds
+
+#endif 
+