1  /* { dg-do run } */
       2  /* { dg-options "-O2 -ftree-vectorize -std=c99 -fipa-pta" } */
       3  
       4  
       5  extern void abort (void);
       6  
       7  #define nEvents 1000
       8  
       9  static void __attribute__((noinline, noclone, optimize("-fno-tree-vectorize")))
      10  init (unsigned *results, unsigned *pData)
      11  {
      12    unsigned int i;
      13    for (i = 0; i < nEvents; ++i)
      14      pData[i] = i % 3;
      15  }
      16  
      17  static void __attribute__((noinline, noclone, optimize("-fno-tree-vectorize")))
      18  check (unsigned *results)
      19  {
      20    unsigned sum = 0;
      21    for (int idx = 0; idx < (int)nEvents; idx++)
      22      sum += results[idx];
      23  
      24    if (sum != 1998)
      25      abort ();
      26  }
      27  
      28  int
      29  main (void)
      30  {
      31    unsigned results[nEvents];
      32    unsigned pData[nEvents];
      33    unsigned coeff = 2;
      34  
      35    init (&results[0], &pData[0]);
      36  
      37  #pragma omp parallel for
      38    for (int idx = 0; idx < (int)nEvents; idx++)
      39      results[idx] = coeff * pData[idx];
      40  
      41    check (&results[0]);
      42  
      43    return 0;
      44  }