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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/109701] I have a MWE where an omp reduction breaks if I add the option for GPU offloading (even if it isn't used).
Date: Thu, 04 May 2023 16:41:16 +0000	[thread overview]
Message-ID: <bug-109701-4-mrOrme8mVD@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-109701-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109701

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is not that surprising.  As mentioned in the linked in PR99928, that
behavior is there only in OpenMP 5.0 and wasn't like that in OpenMP 4.5 and
earlier; in OpenMP 4.5
you really need separate target (or target teams) with explicit map clause and
then distribute ... with reduction.  And this part of OpenMP 5.0 was only
implemented in GCC starting with GCC 12, older versions supported the 4.5
behavior.

      parent reply	other threads:[~2023-05-04 16:41 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-02 17:07 [Bug fortran/109701] New: " thomas.meltzer1 at gmail dot com
2023-05-02 17:10 ` [Bug fortran/109701] " thomas.meltzer1 at gmail dot com
2023-05-02 19:05 ` anlauf at gcc dot gnu.org
2023-05-02 19:35 ` anlauf at gcc dot gnu.org
2023-05-03  8:30 ` thomas.meltzer1 at gmail dot com
2023-05-03 17:45 ` jakub at gcc dot gnu.org
2023-05-04 16:08 ` thomas.meltzer1 at gmail dot com
2023-05-04 16:41 ` jakub at gcc dot gnu.org [this message]

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