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Use __builtin_memmove for trivially copyable types 

2018-07-19  Glen Joseph Fernandes  <glenjofe@gmail.com>

	* include/bits/stl_algobase.h (__copy_move_a): Used
	__is_trivially_copyable.
	(__copy_move_backward_a): Likewise.
	* testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
	New test.

From-SVN: r262884
This commit is contained in:
Glen Joseph Fernandes 2018-07-19 18:58:09 +00:00 committed by Jonathan Wakely
parent 0d21482100
commit 20a0c4e3dc
3 changed files with 47 additions and 2 deletions
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8
libstdc++-v3/ChangeLog
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@ -1,3 +1,11 @@
2018-07-19 Glen Joseph Fernandes <glenjofe@gmail.com>
* include/bits/stl_algobase.h (__copy_move_a): Used
__is_trivially_copyable.
(__copy_move_backward_a): Likewise.
* testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc:
New test.
2018-07-17 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/86450

4
libstdc++-v3/include/bits/stl_algobase.h
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@ -391,7 +391,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
typedef typename iterator_traits<_II>::value_type _ValueTypeI;
typedef typename iterator_traits<_OI>::value_type _ValueTypeO;
typedef typename iterator_traits<_II>::iterator_category _Category;
const bool __simple = (__is_trivial(_ValueTypeI)
const bool __simple = (__is_trivially_copyable(_ValueTypeI)
&& __is_pointer<_II>::__value
&& __is_pointer<_OI>::__value
&& __are_same<_ValueTypeI, _ValueTypeO>::__value);
@ -593,7 +593,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
typedef typename iterator_traits<_BI1>::value_type _ValueType1;
typedef typename iterator_traits<_BI2>::value_type _ValueType2;
typedef typename iterator_traits<_BI1>::iterator_category _Category;
const bool __simple = (__is_trivial(_ValueType1)
const bool __simple = (__is_trivially_copyable(_ValueType1)
&& __is_pointer<_BI1>::__value
&& __is_pointer<_BI2>::__value
&& __are_same<_ValueType1, _ValueType2>::__value);

37
libstdc++-v3/testsuite/20_util/specialized_algorithms/uninitialized_copy/1.cc Normal file
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@ -0,0 +1,37 @@
// Copyright (C) 2018 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-do compile { target c++11 } }
#include <memory>
struct T
{
T() { }
T(const T&) = delete;
};
static_assert(__is_trivially_assignable(T&, const T&) &&
!__is_trivial(T), "T is only trivially copy assignable");
void
test01(T* result)
{
T t[1];
std::uninitialized_copy(t, t+1, result); // { dg-error "here" }
}
// { dg-prune-output "use of deleted function" }