1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized" } */
       3  /* { dg-final { scan-tree-dump-not "link_error" "optimized" } } */
       4  /* { dg-final { scan-tree-dump-not "__builtin_strstr" "optimized" } } */
       5  /* { dg-final { scan-tree-dump-times "return p_\[0-9]*.D.;" 1 "optimized" } } */
       6  /* { dg-final { scan-tree-dump-times "__builtin_strchr" 1 "optimized" } } */
       7  
       8  extern void link_error (void);
       9  
      10  void
      11  foo (void)
      12  {
      13    const char *p = "abcdef";
      14    const char *q = "def";
      15    p++;
      16    q++;
      17    if (__builtin_strstr (p, q) != p + 3)
      18      link_error ();
      19  }
      20  
      21  char *
      22  bar (const char *p)
      23  {
      24    return __builtin_strstr (p, "");
      25  }
      26  
      27  char *
      28  baz (const char *p)
      29  {
      30    return __builtin_strstr (p, "d");
      31  }