1  /* { dg-do run } */
       2  /* { dg-set-target-env-var ASAN_OPTIONS "detect_invalid_pointer_pairs=2 halt_on_error=1" } */
       3  /* { dg-options "-fsanitize=address,pointer-subtract" } */
       4  
       5  volatile __PTRDIFF_TYPE__ v;
       6  
       7  void
       8  bar (char *p, char *q)
       9  {
      10    v = q - p;
      11    v = p - q;
      12  }
      13  
      14  char global[10000] = {};
      15  
      16  int
      17  main ()
      18  {
      19    /* Heap allocated memory.  */
      20    char *p = (char *)__builtin_malloc (42);
      21    bar (p, p + 20);
      22    __builtin_free (p);
      23  
      24    /* Global variable.  */
      25    bar (&global[0], &global[100]);
      26    bar (&global[1000], &global[9000]);
      27    bar (&global[500], &global[10]);
      28    bar (&global[0], &global[10000]);
      29  
      30    /* Stack variable.  */
      31    char stack[10000];
      32    bar (&stack[0], &stack[100]);
      33    bar (&stack[1000], &stack[9000]);
      34    bar (&stack[500], &stack[10]);
      35  
      36    return 0;
      37  }