1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fno-tree-vectorize -fdump-tree-store-merging" } */
       3  
       4  void f (void*);
       5  
       6  void g (void)
       7  {
       8    char a[8];
       9    __builtin_memset (a, 0, 8);
      10  
      11    f (a);
      12  }
      13  
      14  void h (void)
      15  {
      16    char a[8];
      17    __builtin_memset (a, 0, 1);
      18    __builtin_memset (a + 1, 0, 1);
      19    __builtin_memset (a + 2, 0, 1);
      20    __builtin_memset (a + 3, 0, 1);
      21    __builtin_memset (a + 4, 0, 1);
      22    __builtin_memset (a + 5, 0, 1);
      23    __builtin_memset (a + 6, 0, 1);
      24    __builtin_memset (a + 7, 0, 1);
      25  
      26    f (a);
      27  }
      28  
      29  /* { dg-final { scan-tree-dump "Merged into 1 stores" "store-merging" } } */