Add simple test to verify OpenMP offload

[jeanlucf22]

Verify simple OpenMP loop running on device,
to check OpenMP offload working

[jmohdyusof]

I am not sure this is doing what you think it is. From the OpenMP 5.2 spec document:

18.7.6 omp_is_initial_device
Summary
The omp_is_initial_device routine returns true if the current task is executing on the host device; otherwise, it returns false.

I assume we want the code to be executing on the target device if offload is true?

[jeanlucf22]

I am not sure this is doing what you think it is. From the OpenMP 5.2 spec document:

18.7.6 omp_is_initial_device Summary The omp_is_initial_device routine returns true if the current task is executing on the host device; otherwise, it returns false.

I assume we want the code to be executing on the target device if offload is true?

0 = false. So if running on GPU, value will be 0 and test will pass

[jmohdyusof]

OK, I guess I was confused because for C usually exiting with 0 = success. So long as it is used correctly, I guess it is fine

[nicolasbock]

I cannot test whether this works but the code looks good.