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From: "kcy at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgomp/98738] task-detach-6.f90 hangs intermittently
Date: Thu, 11 Mar 2021 14:05:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98738

--- Comment #15 from Kwok Yeung <kcy at codesourcery dot com> ---
(In reply to Thomas Schwinge from comment #13)
> Kwok, it seems -- at least in my testing -- that your latest commit
> d656bfda2d8316627d0bbb18b10954e6aaf3c88c "openmp: Fix intermittent hanging
> of task-detach-6 libgomp tests [PR98738]" has broken things with nvptx
> offloading enabled: because of hanging
> 'libgomp.c/../libgomp.c-c++-common/task-detach-6.c'

I noted this hang at:

https://gcc.gnu.org/pipermail/gcc-patches/2021-February/565740.html

It does not seem to be an issue with the detach support though, as this tri=
vial
testcase will also hang.

int main (void)
{
#pragma omp target
   #pragma omp parallel
     #pragma omp task
       ;
}

I have confirmed that this behaviour occurs even before my original patch f=
or
implementing the detach clause, and it does not occur with GCN offloading.=