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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/110334] [13/14 Regresssion] unused functions not eliminated
 before LTO streaming
Date: Wed, 28 Jun 2023 04:42:24 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110334

--- Comment #13 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Jason Merrill <jason@gcc.gnu.org>:

https://gcc.gnu.org/g:abdf0b6cdff5783b97f35ad61ae31433f0569dfd

commit r14-2149-gabdf0b6cdff5783b97f35ad61ae31433f0569dfd
Author: Jason Merrill <jason@redhat.com>
Date:   Tue Jun 27 05:15:01 2023 -0400

    c++: inherited constructor attributes

    Inherited constructors are like constructor clones; they don't exist fr=
om
    the language perspective, so they should copy the attributes in the same
    way.  But it doesn't make sense to copy alias or ifunc attributes in ei=
ther
    case.  Unlike handle_copy_attribute, we do want to copy inlining
attributes.

    The discussion of PR110334 pointed out that we weren't copying the
    always_inline attribute, leading to poor inlining choices.

            PR c++/110334

    gcc/cp/ChangeLog:

            * cp-tree.h (clone_attrs): Declare.
            * method.cc (implicitly_declare_fn): Use it for inherited
            constructor.
            * optimize.cc (clone_attrs): New.
            (maybe_clone_body): Use it.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp1z/nodiscard-inh1.C: New test.=