C++
Michele Martone suggests:
code like this https://github.com/intel/llvm/tree/sycl/sycl/unittests coming from the new Intel's "standard" oneAPI DPC++ https://github.com/intel/llvm/blob/sycl/sycl/doc/GetStartedGuide.md#code-the-program-for-a-specific-gpu may be more widespread in HPC in the near future
It would be good to see how well Coccinelle does with the code at the unittests link.