[Openmp-dev] LIT failure: clang/test/Driver/openmp-offload-gpu.c

[Shilei Tian via Openmp-dev]

There is dummy file in clang/test/Driver/Inputs/libomptarget. It also has multiple dummy CUDAs. For this specific case, it should not raise the error because passing -S should only contain preprocess and compilation.

Regards,
Shilei

> On Mar 18, 2021, at 5:19 PM, Joachim Protze <protze.joachim at gmail.com> wrote:
> 
> The test complains, that libomptarget-nvptx-sm_60.bc cannot be found.
> How should it be found, if libomptarget is not built?
> 
> - Joachim
> 
> Am 18.03.21 um 22:16 schrieb Shilei Tian:
>> It’s clang driver test, so it doesn’t need to have OpenMP enabled. On Phab, IIRC, by default it’s ALL. I did remember I updated the patch because of the driver case, and later it all passed.
>> 
>> Regards,
>> Shilei
>> 
>>> On Mar 18, 2021, at 5:14 PM, Joachim Protze <protze.joachim at gmail.com> wrote:
>>> 
>>> The REQUIRES lines at the top of the file specify, that all targets need
>>> to be available so that the test is supported.
>>> 
>>> To fulfill the dependency with the bitcode library, this should be added
>>> as another REQUIREment of the test.
>>> 
>>> I assume that phabricator and your local test builds include building
>>> the OpenMP runtime/project?
>>> 
>>> - Joachim
>>> 
>>> 
>>> Am 18.03.21 um 21:38 schrieb Shilei Tian via Openmp-dev:
>>>> Hi Kelvin,
>>>> 
>>>> If only building with target PPC, this case will not be run because clang cannot process CUDA code.
>>>> I think it’s related to our recent change that the bitcode library is required when building OpenMP program so I updated the driver. However it passed the test before (locally and on Phab). I’ll try to reproduce and fix it accordingly.
>>>> 
>>>> Regards,
>>>> Shilei
>>>> 
>>>>> On Mar 18, 2021, at 3:14 PM, Kelvin Li via Openmp-dev <openmp-dev at lists.llvm.org> wrote:
>>>>> 
>>>>> Hi,
>>>>> 
>>>>> I don't know the LIT test infrastructure well enough.  Recently, openmp-offload-gpu.c started to fail in our downstream test.  I find that if I build with LLVM_TARGETS_TO_BUILD="PowerPC", the test is "UNSUPPORTED".  If I build with LLVM_TARGETS_TO_BUILD="ALL", the test fails.  In both cases, NO -DLLVM_ENABLE_RUNTIMES="openmp" is specified in the cmake command
>>>>> 
>>>>> Any clues of the reason?
>>>>> 
>>>>> The error message:
>>>>> 
>>>>> Exit Code: 1
>>>>> Command Output (stderr):
>>>>> --
>>>>> llvm-project/clang/test/Driver/openmp-offload-gpu.c:150:25: error: CHK-NOLIBDEVICE-NOT: excluded string found in input
>>>>> // CHK-NOLIBDEVICE-NOT: error:{{.*}}sm_60
>>>>>                       ^
>>>>> <stdin>:6:8: note: found here
>>>>> clang: error: No library 'libomptarget-nvptx-sm_60.bc' found in the default clang lib directory or in LIBRARY_PATH. Please use --libomptarget-nvptx-bc-path to specify nvptx bitcode library.
>>>>>      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>>> 
>>>>> Kelvin
>>>>> 
>>>>> _______________________________________________
>>>>> Openmp-dev mailing list
>>>>> Openmp-dev at lists.llvm.org
>>>>> https://lists.llvm.org/cgi-bin/mailman/listinfo/openmp-dev
>>>> 
>>>> 
>>>> 
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>>> 
>> 
>> 
> 

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