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PR libstdc++/30416 (continued)

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2007-01-12  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/30416 (continued)
	* include/std/valarray (valarray<>::shift, valarray<>::cshift):
	Allways return the same variable, thus facilitating NRVO.

From-SVN: r120722
This commit is contained in:
Paolo Carlini 2007-01-12 13:34:47 +00:00 • committed by Paolo Carlini
parent f005dd79c5
commit 102693c7de
2 changed files with 25 additions and 11 deletions
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6
libstdc++-v3/ChangeLog
View file

@ -1,3 +1,9 @@
2007-01-12 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/30416 (continued)
* include/std/valarray (valarray<>::shift, valarray<>::cshift):
Allways return the same variable, thus facilitating NRVO.
2007-01-12 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/30416

30
libstdc++-v3/include/std/valarray
View file

@ -782,14 +782,18 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
inline valarray<_Tp>
valarray<_Tp>::shift(int __n) const
{
if (_M_size == 0 || __n == 0)
return *this;
valarray<_Tp> __ret;
if (_M_size == 0)
return __ret;
_Tp* __restrict__ __tmp_M_data =
std::__valarray_get_storage<_Tp>(_M_size);
if (__n > 0) // shift left
if (__n == 0)
std::__valarray_copy_construct(_M_data,
_M_data + _M_size, __tmp_M_data);
else if (__n > 0) // shift left
{
if (size_t(__n) > _M_size)
__n = _M_size;
@ -799,7 +803,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
std::__valarray_default_construct(__tmp_M_data + _M_size - __n,
__tmp_M_data + _M_size);
}
else // shift right
else // shift right
{
if (size_t(-__n) > _M_size)
__n = -_M_size;
@ -819,14 +823,18 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
inline valarray<_Tp>
valarray<_Tp>::cshift(int __n) const
{
if (_M_size == 0 || __n == 0)
return *this;
valarray<_Tp> __ret;
if (_M_size == 0)
return __ret;
_Tp* __restrict__ __tmp_M_data =
std::__valarray_get_storage<_Tp>(_M_size);
if (__n > 0) // cshift left
if (__n == 0)
std::__valarray_copy_construct(_M_data,
_M_data + _M_size, __tmp_M_data);
else if (__n > 0) // cshift left
{
if (size_t(__n) > _M_size)
__n = __n % _M_size;
@ -836,7 +844,7 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
std::__valarray_copy_construct(_M_data + __n, _M_data + _M_size,
__tmp_M_data);
}
else // cshift right
else // cshift right
{
if (size_t(-__n) > _M_size)
__n = -(-__n % _M_size);