https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113807
Bug ID: 113807
Summary: [performance] bitset::set not using memset opportunity
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: rhalbersma at gmail dot com
Target Milestone: ---
Conditionally on is_constant_evaluated() being false, bitset::reset delegate to
__builtin_memset(_M_w, 0, _Nw * sizeof(_WordT)) and uses a loop otherwise. In
contrast, bitset::set unconditionally has a raw loop.
Can't bitset::set also not similarly use __builtin_memset(_M_w, 0xFF, _Nw *
sizeof(_WordT)); when is_constant_evaluated() is false?
