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libstdc++: Remove redundant zeroing in std::bitset::operator>>= [PR113806]

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The unused bits in the high word are already zero before this operation.
Shifting the used bits to the right cannot affect the unused bits, so we
don't need to sanitize them.

libstdc++-v3/ChangeLog:

	PR libstdc++/113806
	* include/std/bitset (bitset::operator>>=): Remove redundant
	call to _M_do_sanitize.
This commit is contained in:
Jonathan Wakely 2024-02-08 15:47:19 +00:00
parent e7ae13a858
commit bf883e6428
1 changed files with 1 additions and 4 deletions
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5
libstdc++-v3/include/std/bitset
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@ -1094,10 +1094,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator>>=(size_t __position) _GLIBCXX_NOEXCEPT
{
if (__builtin_expect(__position < _Nb, 1))
{
this->_M_do_right_shift(__position);
this->_M_do_sanitize();
}
this->_M_do_right_shift(__position);
else
this->_M_do_reset();
return *this;