1  /* { dg-do run } */
       2  /* { dg-require-effective-target store_merge } */
       3  /* { dg-options "-O2 -fdump-tree-store-merging" } */
       4  
       5  /* Check that we can widen accesses to bitfields.  */
       6  
       7  struct bar {
       8    int a : 3;
       9    unsigned char b : 4;
      10    unsigned char c : 1;
      11    char d;
      12    char e;
      13    char f;
      14    char g;
      15  };
      16  
      17  __attribute__ ((noinline)) void
      18  foozero (struct bar *p)
      19  {
      20    p->b = 0;
      21    p->a = 0;
      22    p->c = 0;
      23    p->d = 0;
      24    p->e = 0;
      25    p->f = 0;
      26    p->g = 0;
      27  }
      28  
      29  __attribute__ ((noinline)) void
      30  foo1 (struct bar *p)
      31  {
      32    p->b = 3;
      33    p->a = 2;
      34    p->c = 1;
      35    p->d = 4;
      36    p->e = 5;
      37  }
      38  
      39  int
      40  main (void)
      41  {
      42    struct bar p;
      43    foozero (&p);
      44    foo1 (&p);
      45    if (p.a != 2 || p.b != 3 || p.c != 1 || p.d != 4 || p.e != 5
      46        || p.f != 0 || p.g != 0)
      47      __builtin_abort ();
      48  
      49    return 0;
      50  }
      51  
      52  
      53  /* { dg-final { scan-tree-dump-times "Merging successful" 2 "store-merging" } } */