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Subject: [Bug c++/95520] [coroutines] __builtin_FUNCTION() returns mangled
 .actor instead of original function name
Date: Sun, 03 Oct 2021 19:28:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95520

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Iain D Sandoe
<iains@gcc.gnu.org>:

https://gcc.gnu.org/g:bf455aa06f95edf15b3ee619b1096dde716fed64

commit r10-10165-gbf455aa06f95edf15b3ee619b1096dde716fed64
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Thu Jul 8 09:42:49 2021 +0100

    coroutines: Adjust outlined function names [PR95520].

    The mechanism used to date for uniquing the coroutine helper
    functions (actor, destroy) was over-complicating things and
    leading to the noted PR and also difficulties in setting
    breakpoints on these functions (so this will help PR99215 as
    well).

    This implementation delegates the adjustment to the mangling
    to write_encoding() which necessitates some book-keeping so
    that it is possible to determine which of the coroutine
    helper names is to be mangled.

    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

    PR c++/95520 - [coroutines] __builtin_FUNCTION() returns mangled .actor
instead of original function name

            PR c++/95520

    gcc/cp/ChangeLog:

            * coroutines.cc (struct coroutine_info): Add fields for
            actor and destroy function decls.
            (to_ramp): New.
            (coro_get_ramp_function): New.
            (coro_get_actor_function): New.
            (coro_get_destroy_function): New.
            (act_des_fn): Set up mapping between ramp, actor and
            destroy functions.
            (morph_fn_to_coro): Adjust interface to the builder for
            helper function decls.
            * cp-tree.h (DECL_ACTOR_FN, DECL_DESTROY_FN, DECL_RAMP_FN,
            JOIN_STR): New.
            * mangle.c (write_encoding): Handle coroutine helpers.
            (write_unqualified_name): Handle lambda coroutine helpers.

    gcc/testsuite/ChangeLog:

            * g++.dg/coroutines/pr95520.C: New test.

    (cherry picked from commit 237ab3ee49e2f3110accfcc03b6c0df8b4889f15)=