[Bug c++/115858] Incompatibility of coroutines and alloca()

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115858

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Arsen Arsenovic <ar...@gcc.gnu.org>:

https://gcc.gnu.org/g:c73d7f3c66c0b5865edd6880cd0d6be723cfbb8d

commit r15-3202-gc73d7f3c66c0b5865edd6880cd0d6be723cfbb8d
Author: Arsen ArsenoviÄ <ar...@aarsen.me>
Date:   Fri Aug 2 13:17:40 2024 +0200

    coroutines: diagnose usage of alloca in coroutines

    We do not support it currently, and the resulting memory can only be
    used inside a single resumption, so best not confuse the user with it.

            PR c++/115858 - Incompatibility of coroutines and alloca()

    gcc/ChangeLog:

            * coroutine-passes.cc (execute_early_expand_coro_ifns): Emit a
            sorry if a statement is an alloca call.

    gcc/testsuite/ChangeLog:

            * g++.dg/coroutines/pr115858.C: New test.