[Bug middle-end/109849] suboptimal code for vector walking loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109849

--- Comment #36 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Francois Dumont <fdum...@gcc.gnu.org>:

https://gcc.gnu.org/g:0426be454448f8cfb9db21f4f669426afb7b57c8

commit r15-996-g0426be454448f8cfb9db21f4f669426afb7b57c8
Author: François Dumont <frs.dum...@gmail.com>
Date:   Sat Jun 1 22:17:19 2024 +0200

    libstdc++: Fix -Wstringop-overflow warning coming from std::vector
[PR109849]

    libstdc++-v3/ChangeLog:

            PR libstdc++/109849
            * include/bits/vector.tcc
            (std::vector<>::_M_range_insert(iterator, _FwdIt, _FwdIt,
            forward_iterator_tag))[__cplusplus < 201103L]: Add
__builtin_unreachable
            expression to tell the compiler that the allocated buffer is large
enough to
            receive current elements plus the elements of the range to insert.