[Bug libstdc++/101608] ranges::fill/fill_n missing std::is_constant_evaluated() condition for __builtin_memset

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101608

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jonathan Wakely
<r...@gcc.gnu.org>:

https://gcc.gnu.org/g:7ae6e4e3831429d20eea1be285dbc6a4a005930f

commit r11-9314-g7ae6e4e3831429d20eea1be285dbc6a4a005930f
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Wed Nov 24 13:17:54 2021 +0000

    libstdc++: Do not use memset in constexpr calls to ranges::fill_n
[PR101608]

    libstdc++-v3/ChangeLog:

            PR libstdc++/101608
            * include/bits/ranges_algobase.h (__fill_n_fn): Check for
            constant evaluation before using memset.
            * testsuite/25_algorithms/fill_n/constrained.cc: Check
            byte-sized values as well.

    (cherry picked from commit 82c3657dd74896b39937bb0a2aaeba9b8ca105fd)