[Bug libgomp/105201] New: cuLaunchKernel error with subsequent empty target regions

[marcel at codesourcery dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105201

            Bug ID: 105201
           Summary: cuLaunchKernel error with subsequent empty target
                    regions
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgomp
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marcel at codesourcery dot com
                CC: jakub at gcc dot gnu.org
  Target Milestone: ---

Hi all,

I observed a 
   "libgomp: cuLaunchKernel error: invalid resource handle"
for the following testcase (compiled with x86_64-linux and run with nvptx
offloading (different machines with different kinds of GPUs)):

#include <omp.h>
int
main (int argc, char *const *argv)
{
  __builtin_printf ("omp_get_num_devices (): %d\n", omp_get_num_devices ());
  for (int i=0; i < 2; i++)
    #pragma omp target device (i)
    ;
  #pragma omp target device (0)
  ;
  return 0;
}

The error occurred when using two devices at least (for (n)one device the test
passes).

Marcel