[Bug c++/95428] ABI breakage for "base object constructor" for final classes

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95428

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jason Merrill
<ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:d94796352234def681a34eef99dad18bccecbca7

commit r10-8659-gd94796352234def681a34eef99dad18bccecbca7
Author: Jason Merrill <ja...@redhat.com>
Date:   Fri Aug 21 16:23:03 2020 -0400

    c++: Emit as-base 'tor symbols for final class.  [PR95428]

    For PR70462 I stopped emitting the as-base constructor and destructor
    variants for final classes, because they can never be called.  Except that
    it turns out that clang calls base variants from complete variants, even
for
    classes with virtual bases, and in some cases inlines them such that the
    calls to the base variant are exposed.  So we need to continue to emit the
    as-base symbols, even though they're unreachable by G++-compiled code.

    gcc/cp/ChangeLog:

            PR c++/95428
            * optimize.c (populate_clone_array): Revert PR70462 change.
            (maybe_clone_body): Likewise.

    gcc/testsuite/ChangeLog:

            * g++.dg/other/final8.C: Adjust expected output.