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Subject: [Bug libstdc++/101608] ranges::fill/fill_n missing
 std::is_constant_evaluated() condition for __builtin_memset
Date: Thu, 25 Nov 2021 20:03:43 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101608

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:82c3657dd74896b39937bb0a2aaeba9b8ca105fd

commit r12-5530-g82c3657dd74896b39937bb0a2aaeba9b8ca105fd
Author: Jonathan Wakely <jwakely@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.=