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| author | Jonathan Wakely <jwakely@redhat.com> | 2024-06-10 14:08:16 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2024-06-12 15:06:47 +0100 |
| commit | bd3a312728fbf8c35a09239b9180269f938f872e (patch) | |
| tree | d2775de3e5d07ffe67332d96f53d225997c4fa1a /gcc | |
| parent | 3f2f9059c7f76ff888e9d0e8f10dec6f48e346c9 (diff) | |
| download | gcc-bd3a312728fbf8c35a09239b9180269f938f872e.zip gcc-bd3a312728fbf8c35a09239b9180269f938f872e.tar.gz gcc-bd3a312728fbf8c35a09239b9180269f938f872e.tar.bz2 | |
libstdc++: Fix std::tr2::dynamic_bitset shift operations [PR115399]
The shift operations for dynamic_bitset fail to zero out words where the
non-zero bits were shifted to a completely different word.
For a right shift we don't need to sanitize the unused bits in the high
word, because we know they were already clear and a right shift doesn't
change that.
libstdc++-v3/ChangeLog:
PR libstdc++/115399
* include/tr2/dynamic_bitset (operator>>=): Remove redundant
call to _M_do_sanitize.
* include/tr2/dynamic_bitset.tcc (_M_do_left_shift): Zero out
low bits in words that should no longer be populated.
(_M_do_right_shift): Likewise for high bits.
* testsuite/tr2/dynamic_bitset/pr115399.cc: New test.
Diffstat (limited to 'gcc')
0 files changed, 0 insertions, 0 deletions