1  /* PR rtl-optimization/64316 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O3" } */
       4  /* { dg-additional-options "-mavx2" { target { i?86-*-* x86_64-*-* } } } */
       5  
       6  struct S
       7  {
       8    unsigned int s;
       9    unsigned long w[];
      10  };
      11  
      12  struct S **s;
      13  
      14  int
      15  foo (struct S *x, struct S *y, struct S *z)
      16  {
      17    unsigned int i;
      18    unsigned long *a, *b, *c;
      19    int r = 0;
      20    for (a = x->w, b = y->w, c = z->w, i = 0; i < x->s; i++, a++)
      21      {
      22        unsigned long d = *b++ & *c++;
      23        if (*a != d)
      24  	{
      25  	  r = 1;
      26  	  *a = d;
      27  	}
      28      }
      29    return r;
      30  }
      31  
      32  void
      33  bar (int x)
      34  {
      35    int p = x - 1;
      36    do
      37      {
      38        foo (s[x], s[x], s[p]);
      39        p--;
      40      }
      41    while (p > 0);
      42  }