1  /* { dg-options "-O3 -fdump-tree-lversion-details" } */
       2  
       3  /* Versioning for step == 1 in these loops would allow loop interchange,
       4     but otherwise isn't worthwhile.  At the moment we decide not to version.  */
       5  
       6  struct foo {
       7    int a[100];
       8  };
       9  
      10  void
      11  f1 (struct foo *x, int step, int n)
      12  {
      13    for (int i = 0; i < n; ++i)
      14      for (int j = 0; j < n; ++j)
      15        x[j * step].a[i] = 100;
      16  }
      17  
      18  void
      19  f2 (struct foo *x, int step, int n)
      20  {
      21    for (int i = 0; i < n; ++i)
      22      for (int j = 0; j < n; ++j)
      23        x[j].a[i * step] = 100;
      24  }
      25  
      26  void
      27  f3 (struct foo *x, int step, int limit)
      28  {
      29    for (int i = 0; i < 100; ++i)
      30      for (int j = 0; j < limit; j += step)
      31        x[j].a[i] = 100;
      32  }
      33  
      34  void
      35  f4 (struct foo *x, int step, int limit)
      36  {
      37    for (int i = 0; i < limit; i += step)
      38      for (int j = 0; j < 100; ++j)
      39        x[j].a[i] = 100;
      40  }
      41  
      42  /* { dg-final { scan-tree-dump-not {want to version} "lversion" } } */
      43  /* { dg-final { scan-tree-dump-not {versioned} "lversion" } } */