1  #include <stdlib.h>
       2  #include <unistd.h>
       3  
       4  int
       5  main ()
       6  {
       7    #pragma omp parallel
       8    #pragma omp single
       9    {
      10      int x = 1, y = 2, z = 3;
      11      #pragma omp taskgroup
      12      {
      13        #pragma omp task shared (x, y, z) depend(inout: x, y) \
      14  		       depend (in: z) if (x > 10)
      15        {
      16  	if (x != 1 || y != 2 || z != 3)
      17  	  abort ();
      18  	x = 4;
      19  	y = 5;
      20        }
      21        /* The above task has depend clauses, but no dependencies
      22  	 on earlier tasks, and is if (0), so must be scheduled
      23  	 immediately.  */
      24        if (x != 4 || y != 5)
      25  	abort ();
      26      }
      27      #pragma omp taskgroup
      28      {
      29        #pragma omp task shared (x, y) depend(in: x, y)
      30        {
      31  	usleep (10000);
      32  	if (x != 4 || y != 5 || z != 3)
      33  	  abort ();
      34        }
      35        #pragma omp task shared (x, y) depend(in: x, y)
      36        {
      37  	usleep (10000);
      38  	if (x != 4 || y != 5 || z != 3)
      39  	  abort ();
      40        }
      41        #pragma omp task shared (x, y, z) depend(inout: x, y) \
      42  		       depend (in: z) if (x > 10)
      43        {
      44  	if (x != 4 || y != 5 || z != 3)
      45  	  abort ();
      46  	x = 6;
      47  	y = 7;
      48        }
      49        /* The above task has depend clauses, and may have dependencies
      50  	 on earlier tasks, while it is if (0), it can be deferred.  */
      51      }
      52      if (x != 6 || y != 7)
      53        abort ();
      54    }
      55    return 0;
      56  }