1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized" } */
       3  
       4  void f1 (char *p, __SIZE_TYPE__ sz)
       5  {
       6    char *q = __builtin_memchr (p, 0, sz);
       7    __PTRDIFF_TYPE__ n = q - p;
       8  
       9    if (n >= __PTRDIFF_MAX__)
      10      __builtin_abort ();
      11  }
      12  
      13  void f2 (unsigned char *p, __SIZE_TYPE__ sz)
      14  {
      15    unsigned char *q = __builtin_memchr (p, 0, sz);
      16    __PTRDIFF_TYPE__ n = q - p;
      17  
      18    if (n >= __PTRDIFF_MAX__)
      19      __builtin_abort ();
      20  }
      21  
      22  void f3 (signed char *p, __SIZE_TYPE__ sz)
      23  {
      24    signed char *q = __builtin_memchr (p, 0, sz);
      25    __PTRDIFF_TYPE__ n = q - p;
      26  
      27    if (n >= __PTRDIFF_MAX__)
      28      __builtin_abort ();
      29  }
      30  
      31  
      32  /* { dg-final { scan-tree-dump-not "memchr" "optimized" } } */