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

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95520

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Iain D Sandoe
<iains@gcc.gnu.org>:

https://gcc.gnu.org/g:3a93c67f21818eafd6823a7c3d06db1432f9c07b

commit r11-8787-g3a93c67f21818eafd6823a7c3d06db1432f9c07b
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)