[Bug objc/101718] Objective-C frontend emits wrong code to call methods returning scalar types returned in memory

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101718

--- Comment #8 from GCC 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:106cfc476a55c7423dca23be1eb0a5fb5da736b5

commit r11-11302-g106cfc476a55c7423dca23be1eb0a5fb5da736b5
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Mon Aug 16 21:22:13 2021 +0100

    Objective-C, NeXT: Fix messenging non-aggregate return-in-memory.

    When a method returns a type that the platform ABI says should be
    returned in memory, and that is done by a hidden 'sret' parameter,
    the message send calls must be adjusted to inform the runtime that
    the sret parameter is present.  As reported in the PR, this is not
    working for non-aggregate types that use this mechanism.  The fix
    here is to adjust the logic such that all return values that flag
    'in memory' are considered to use the mechanism *unless* they
    provide a struct_value_rtx *and* the return object is an aggregate.

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

    PR objc/101718 - Objective-C frontend emits wrong code to call methods
returning scalar types returned in memory

            PR objc/101718

    gcc/objc/ChangeLog:

            * objc-next-runtime-abi-02.c (build_v2_build_objc_method_call):
            Revise for cases where scalar objects use an sret parameter.
            (next_runtime_abi_02_build_objc_method_call): Likwise.

    (cherry picked from commit 1cef3039b880a21fbdf4153e6fc42026619fd4ad)