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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgomp/108098] OpenMP/nvptx reverse offload execution test
 FAILs
Date: Mon, 08 May 2023 21:15:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108098

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Tobias Burnus
<burnus@gcc.gnu.org>:

https://gcc.gnu.org/g:615b920553fd28e9d4732dedcd799227e82cc011

commit r13-7306-g615b920553fd28e9d4732dedcd799227e82cc011
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 [PR1080=
98]

    Seemingly, the ptx JIT of CUDA <=3D 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 lo=
ad.

    Solution is the same as found by Thomas for a related issue: Adding a d=
ummy
    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.

    (cherry picked from commit 4359724cba31b2645f6106266bef019c3d6ef16a)=