1  /* { dg-do run } */
       2  /* { dg-require-effective-target offload_device_nonshared_as } */
       3  
       4  #include <omp.h>
       5  #include <stdlib.h>
       6  
       7  #define EPS 0.000001
       8  #define N 100000
       9  #define THRESHOLD1 10000
      10  #define THRESHOLD2 1000
      11  
      12  void init (float *a1, float *a2)
      13  {
      14    float s = -1;
      15    int i;
      16    for (i = 0; i < N; i++)
      17      {
      18        a1[i] = s;
      19        a2[i] = i;
      20        s = -s;
      21      }
      22  }
      23  
      24  void check (float *a, float *b)
      25  {
      26    int i;
      27    for (i = 0; i < N; i++)
      28      if (a[i] - b[i] > EPS || b[i] - a[i] > EPS)
      29        abort ();
      30  }
      31  
      32  void vec_mult_ref (float *p, float *v1, float *v2)
      33  {
      34    int i;
      35    for (i = 0; i < N; i++)
      36      p[i] = v1[i] * v2[i];
      37  }
      38  
      39  void vec_mult (float *p, float *v1, float *v2)
      40  {
      41    int i;
      42    #pragma omp target if(N > THRESHOLD1) map(to: v1[0:N], v2[:N]) \
      43  		     map(from: p[0:N])
      44      {
      45        if (omp_is_initial_device ())
      46  	abort ();
      47  
      48        #pragma omp parallel for if(N > THRESHOLD2)
      49  	for (i = 0; i < N; i++)
      50  	  p[i] = v1[i] * v2[i];
      51      }
      52  }
      53  
      54  int main ()
      55  {
      56    float p1[N], p2[N];
      57    float v1[N], v2[N];
      58  
      59    init (v1, v2);
      60  
      61    vec_mult_ref (p1, v1, v2);
      62    vec_mult (p2, v1, v2);
      63  
      64    check (p1, p2);
      65  
      66    return 0;
      67  }