[Bug libgomp/108098] OpenMP/nvptx reverse offload execution test FAILs

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108098

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tobias Burnus <burnus@gcc.gnu.org>:

https://gcc.gnu.org/g:4359724cba31b2645f6106266bef019c3d6ef16a

commit r14-491-g4359724cba31b2645f6106266bef019c3d6ef16a
Author: Tobias Burnus <tobias@codesourcery.com>
Date:   Fri May 5 11:27:32 2023 +0200

    nvptx/mkoffload.cc: Add dummy proc for OpenMP rev-offload table [PR108098]

    Seemingly, the ptx JIT of CUDA <= 10.2 replaces function pointers in global
    variables by NULL if a translation does not contain any executable code. It
    works with CUDA 11.1.  The code of this commit is about reverse offload;
    having NULL values disables the side of reverse offload during image load.

    Solution is the same as found by Thomas for a related issue: Adding a dummy
    procedure. Cf. the PR of this issue and Thomas' patch
    "nvptx: Support global constructors/destructors via 'collect2'"
    https://gcc.gnu.org/pipermail/gcc-patches/2022-December/607749.html

    As that approach also works here:

    Co-authored-by: Thomas Schwinge <thomas@codesourcery.com>

    gcc/
            PR libgomp/108098

            * config/nvptx/mkoffload.cc (process): Emit dummy procedure
            alongside reverse-offload function table to prevent NULL values
            of the function addresses.