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
main(void)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" } } */
34