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From: "fdumont at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/103621] stable_sort could call
 std::__merge_sort_with_buffer directly in typical case
Date: Thu, 13 Oct 2022 17:12:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103621

Fran=C3=A7ois Dumont <fdumont at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.0
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |fdumont at gcc dot gnu.org
         Resolution|---                         |FIXED

--- Comment #1 from Fran=C3=A7ois Dumont <fdumont at gcc dot gnu.org> ---
I think it has been fixed by:
commit 63d182fb86e47323ac50d9368845d712e1f7da89
Author: Fran=C3=A7ois Dumont <fdumont@gcc.gnu.org>
Date:   Thu Jan 21 19:30:47 2021 +0100

    libstdc++: Enhance branching in std::inplace_merge and std::stable_sort

    When we manage to allocate a buffer of the expected size we can simplify
the code to
    perform the expected algorithm.

    libstdc++-v3/ChangeLog:

            * include/bits/stl_algo.h
            (__merge_adaptive): Adapt to merge only when buffer is large
enough..
            (__merge_adaptive_resize): New, adapt merge when buffer is too
small.
            (__inplace_merge): Adapt, use latter.
            (__stable_sort_adaptive): Adapt to sort only when buffer is lar=
ge
enough.
            (__stable_sort_adaptive_resize): New, adapt sort when buffer is=
 too
small.
            (__stable_sort): Adapt, use latter.


Let us know otherwise.=