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

[Joachim Protze via Openmp-dev]

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
>>>>
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>>>
>>>
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>>
> 
>