1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-dse1-details" } */
       3  
       4  void f(int n, char *p0, char *p1, char *p2, char *o)
       5  {
       6    int t0, t1;
       7    __builtin_memcpy(&t0, p0, 1);
       8    __builtin_memcpy(&t1, p1, 1);
       9    if (n==3)
      10      __builtin_memcpy(o+2, p2, 1);
      11    __builtin_memcpy(o+0, &t0, 1);
      12    __builtin_memcpy(o+1, &t1, 1);
      13  }
      14  
      15  /* { dg-final { scan-tree-dump-times "Deleted dead store" 2 "dse1" } } */