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| author | Jonathan Wakely <jwakely@redhat.com> | 2024-02-08 15:47:19 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2024-02-15 11:43:21 +0000 |
| commit | bf883e6428a545d091319c8b71fcfb35e7dd7084 (patch) | |
| tree | a141b6548b73220e36465835236c550638afc94e | |
| parent | e7ae13a858f36031b8fd3aa07362752ff2b19b2e (diff) | |
| download | gcc-bf883e6428a545d091319c8b71fcfb35e7dd7084.zip gcc-bf883e6428a545d091319c8b71fcfb35e7dd7084.tar.gz gcc-bf883e6428a545d091319c8b71fcfb35e7dd7084.tar.bz2 | |
libstdc++: Remove redundant zeroing in std::bitset::operator>>= [PR113806]
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.
| -rw-r--r-- | libstdc++-v3/include/std/bitset | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/libstdc++-v3/include/std/bitset b/libstdc++-v3/include/std/bitset index 16c4040..ccd6d19 100644 --- a/libstdc++-v3/include/std/bitset +++ b/libstdc++-v3/include/std/bitset @@ -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; |