1  /* { dg-do compile } */
       2  /* { dg-require-effective-target non_strict_align } */
       3  /* { dg-options "-O2 -fdump-tree-store-merging-details" } */
       4  
       5  /* Make sure stores to volatile addresses don't get combined with
       6     other accesses.  */
       7  
       8  struct bar
       9  {
      10    int a;
      11    char b;
      12    char c;
      13    volatile short d;
      14    char e;
      15    char f;
      16    char g;
      17  };
      18  
      19  void
      20  foozero (struct bar *p)
      21  {
      22    p->b = 0xa;
      23    p->a = 0xb;
      24    p->c = 0xc;
      25    p->d = 0;
      26    p->e = 0xd;
      27    p->f = 0xe;
      28    p->g = 0xf;
      29  }
      30  
      31  /* { dg-final { scan-tree-dump "Volatile access terminates all chains" "store-merging" } } */
      32  /* { dg-final { scan-tree-dump-times "=\{v\} 0;" 1 "store-merging" } } */