2020-03-04 Patrick Palka <ppalka@redhat.com>
+ PR libstdc++/94017
+ * include/bits/ranges_algobase.h (__fill_n_fn::operator()): Refine
+ condition for when to use memset, making sure to additionally check that
+ the output pointer's value type is a non-volatile byte type. Instead of
+ requiring that the fill type is a byte type, just require that it's an
+ integral type.
+ * testsuite/20_util/specialized_algorithms/uninitialized_fill/94017.cc:
+ New test.
+ * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/94017.cc:
+ New test.
+ * testsuite/25_algorithms/fill/94013.cc: Uncomment part of test that was
+ blocked by PR 94017.
+ * testsuite/25_algorithms/fill/94017.cc: New test.
+ * testsuite/25_algorithms/fill_n/94017.cc: New test.
+
LWG 3355 The memory algorithms should support move-only input iterators
introduced by P1207
* include/bits/ranges_uninitialized.h
if (__n <= 0)
return __first;
- // TODO: is __is_byte the best condition?
- if constexpr (is_pointer_v<_Out> && __is_byte<_Tp>::__value)
+ // TODO: Generalize this optimization to contiguous iterators.
+ if constexpr (is_pointer_v<_Out>
+ // Note that __is_byte already implies !is_volatile.
+ && __is_byte<remove_pointer_t<_Out>>::__value
+ && integral<_Tp>)
{
__builtin_memset(__first, static_cast<unsigned char>(__value), __n);
return __first + __n;
--- /dev/null
+// Copyright (C) 2020 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/>.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do run { target c++2a } }
+
+#include <algorithm>
+#include <memory>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+using __gnu_test::test_output_range;
+
+namespace ranges = std::ranges;
+
+template<typename Out, auto value>
+void
+test01()
+{
+ {
+ Out x[5];
+ ranges::uninitialized_fill(x, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+
+ {
+ Out x[5];
+ test_output_range<Out> rx(x);
+ ranges::uninitialized_fill(x, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+}
+
+int
+main()
+{
+ test01<char, 'a'>();
+ test01<char, 100>();
+ test01<char, 150>();
+ test01<char, 300>();
+ test01<char, 1000>();
+ test01<char, -10000L>();
+
+ test01<signed char, 'a'>();
+ test01<signed char, 100>();
+ test01<signed char, 150>();
+ test01<signed char, 300>();
+
+ test01<unsigned char, 'a'>();
+ test01<unsigned char, 100>();
+ test01<unsigned char, 150>();
+ test01<unsigned char, 300>();
+
+ test01<int, 'a'>();
+ test01<int, u8'a'>();
+ test01<int, (signed char)'a'>();
+ test01<int, (unsigned char)'a'>();
+
+ test01<volatile int, 'a'>();
+ test01<volatile int, 'a'>();
+ test01<volatile int, 500>();
+ test01<volatile char, 500>();
+}
--- /dev/null
+// Copyright (C) 2020 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/>.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do run { target c++2a } }
+
+#include <algorithm>
+#include <memory>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+using __gnu_test::test_output_range;
+
+namespace ranges = std::ranges;
+
+template<typename Out, auto value>
+void
+test01()
+{
+ {
+ Out x[5];
+ ranges::uninitialized_fill_n(x, 5, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+
+ {
+ Out x[5];
+ test_output_range<Out> rx(x);
+ ranges::uninitialized_fill_n(x, 5, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+}
+
+int
+main()
+{
+ test01<char, 'a'>();
+ test01<char, 100>();
+ test01<char, 150>();
+ test01<char, 300>();
+ test01<char, 1000>();
+ test01<char, -10000L>();
+
+ test01<signed char, 'a'>();
+ test01<signed char, 100>();
+ test01<signed char, 150>();
+ test01<signed char, 300>();
+
+ test01<unsigned char, 'a'>();
+ test01<unsigned char, 100>();
+ test01<unsigned char, 150>();
+ test01<unsigned char, 300>();
+
+ test01<int, 'a'>();
+ test01<int, u8'a'>();
+ test01<int, (signed char)'a'>();
+ test01<int, (unsigned char)'a'>();
+
+ test01<volatile int, 'a'>();
+ test01<volatile int, 'a'>();
+ test01<volatile int, 500>();
+ test01<volatile char, 500>();
+}
c = 4;
std::ranges::fill(a, c);
VERIFY( a[0] == 4 && a[1] == 4 );
- // currently fails, see PR 94017
- // unsigned char c2 = 5;
- // std::ranges::fill(a, c2);
+ unsigned char c2 = 5;
+ std::ranges::fill(a, c2);
#endif
}
--- /dev/null
+// Copyright (C) 2020 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/>.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do run { target c++2a } }
+
+#include <algorithm>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+using __gnu_test::test_output_range;
+
+namespace ranges = std::ranges;
+
+template<typename Out, auto value>
+void
+test01()
+{
+ {
+ Out x[5];
+ ranges::fill(x, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+
+ {
+ Out x[5];
+ test_output_range<Out> rx(x);
+ ranges::fill(x, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+}
+
+int
+main()
+{
+ test01<char, 'a'>();
+ test01<char, 100>();
+ test01<char, 150>();
+ test01<char, 300>();
+ test01<char, 1000>();
+ test01<char, -10000L>();
+
+ test01<signed char, 'a'>();
+ test01<signed char, 100>();
+ test01<signed char, 150>();
+ test01<signed char, 300>();
+
+ test01<unsigned char, 'a'>();
+ test01<unsigned char, 100>();
+ test01<unsigned char, 150>();
+ test01<unsigned char, 300>();
+
+ test01<int, 'a'>();
+ test01<int, u8'a'>();
+ test01<int, (signed char)'a'>();
+ test01<int, (unsigned char)'a'>();
+
+ test01<volatile int, 'a'>();
+ test01<volatile int, 'a'>();
+ test01<volatile int, 500>();
+ test01<volatile char, 500>();
+}
--- /dev/null
+// Copyright (C) 2020 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/>.
+
+// { dg-options "-std=gnu++2a" }
+// { dg-do run { target c++2a } }
+
+#include <algorithm>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+using __gnu_test::test_output_range;
+
+namespace ranges = std::ranges;
+
+template<typename Out, auto value>
+void
+test01()
+{
+ {
+ Out x[5];
+ ranges::fill_n(x, 5, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+
+ {
+ Out x[5];
+ test_output_range<Out> rx(x);
+ ranges::fill_n(x, 5, value);
+ VERIFY( ranges::count(x, static_cast<Out>(value)) == ranges::size(x) );
+ }
+}
+
+int
+main()
+{
+ test01<char, 'a'>();
+ test01<char, 100>();
+ test01<char, 150>();
+ test01<char, 300>();
+ test01<char, 1000>();
+ test01<char, -10000L>();
+
+ test01<signed char, 'a'>();
+ test01<signed char, 100>();
+ test01<signed char, 150>();
+ test01<signed char, 300>();
+
+ test01<unsigned char, 'a'>();
+ test01<unsigned char, 100>();
+ test01<unsigned char, 150>();
+ test01<unsigned char, 300>();
+
+ test01<int, 'a'>();
+ test01<int, u8'a'>();
+ test01<int, (signed char)'a'>();
+ test01<int, (unsigned char)'a'>();
+
+ test01<volatile int, 'a'>();
+ test01<volatile int, 'a'>();
+ test01<volatile int, 500>();
+ test01<volatile char, 500>();
+}
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