[Openmp-dev] Mapped without a warning, but device code fails at run time

[Doerfert, Johannes via Openmp-dev]

Got it this time (attached again for the list), thanks!

After a brief look, I think we need to open a bug for this. If the behavior is as you described, it is a problem we need to fix.

________________________________________
From: Itaru Kitayama <itaru.kitayama at gmail.com>
Sent: Monday, November 4, 2019 01:36
To: Doerfert, Johannes
Subject: Re: [Openmp-dev] Mapped without a warning, but device code fails at run time

I've attached the reproducer. Thanks,

On Mon, Nov 4, 2019 at 4:27 PM Doerfert, Johannes <jdoerfert at anl.gov<mailto:jdoerfert at anl.gov>> wrote:
This sounds like a bug. Changing a type should not only impact runtime
offloading behavior (with exceptions).

I fail to locate the attachment, could you resend or put it somewhere
online?

Thanks,
  Johannes

On 11/04, Itaru Kitayama wrote:
> In the attached code, if I remove the protected member, syn_id_delay_ from
> the class definition, it runs on the device.
>
> On Tue, Oct 29, 2019 at 7:40 AM Itaru Kitayama <itaru.kitayama at gmail.com<mailto:itaru.kitayama at gmail.com>>
> wrote:
>
> > Hi,
> > How do I enable debug messages at run time?
> > I've attached a small reproducer for you to take a look at it.
> >
> > On Tue, Oct 29, 2019 at 3:42 AM Doerfert, Johannes <jdoerfert at anl.gov<mailto:jdoerfert at anl.gov>>
> > wrote:
> >
> >> This can have various reasons, including a compiler bug.
> >> Try to enable debug messages by the runtime and see if that helps to
> >> determine why offloading failed.
> >> You can also provide a small reproducer so we can take a look.
> >>
> >> ________________________________________
> >> From: Openmp-dev <openmp-dev-bounces at lists.llvm.org<mailto:openmp-dev-bounces at lists.llvm.org>> on behalf of Itaru
> >> Kitayama via Openmp-dev <openmp-dev at lists.llvm.org<mailto:openmp-dev at lists.llvm.org>>
> >> Sent: Monday, October 21, 2019 22:20
> >> To: openmp-dev
> >> Subject: [Openmp-dev] Mapped without a warning, but device code fails at
> >> run time
> >>
> >> Hi,
> >> By checking the compiler message, a type is mapped without triggering
> >> a Non-trivial type ... warning, but the device code fails at the run time
> >> leaving:
> >>
> >> Libomptarget fatal error 1: failure of target construct while offloading
> >> is mandatory
> >>
> >> (in the code accessing an element in a user-defined "vector")
> >> in this case, should I worry about a possible compiler bug?
> >>
> >

--

Johannes Doerfert
Researcher

Argonne National Laboratory
Lemont, IL 60439, USA

jdoerfert at anl.gov<mailto:jdoerfert at anl.gov>
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