1  /* { dg-do compile } */
       2  /* { dg-options "-O1 -fdump-tree-optimized" } */
       3  
       4  struct
       5  {
       6    struct
       7      {
       8        int a;
       9        int b;
      10      } a[100];
      11  } a;
      12  
      13  typedef __SIZE_TYPE__ size_t;
      14  void foo(size_t);
      15  size_t *bar (void);
      16  
      17  int
      18  main (void)
      19  {
      20    size_t *b = bar ();
      21  
      22    /* This should be folded.  */
      23    foo (&a.a[50].a - &a.a[33].b);
      24    foo ((size_t) &a.a[50].b - (size_t) &a);
      25  
      26    /* And this should not.  */
      27    foo ((size_t) &b - (size_t) b);
      28    return 0;
      29  }
      30  
      31  /* Two of the calls to foo should be folded to just foo(constant).  */
      32  
      33  /* { dg-final { scan-tree-dump-times "foo \\(\[0-9\]*\\)" 2 "optimized" } } */