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/* { dg-do compile } */
/* { dg-options "-O1 -fdump-tree-optimized" } */
 
struct
{
  struct
    {
      int a;
      int b;
    } a[100];
} a;
 
typedef __SIZE_TYPE__ size_t;
void foo(size_t);
size_t *bar (void);
 
int
main (void)
{
  size_t *b = bar ();
 
  /* This should be folded.  */
  foo (&a.a[50].a - &a.a[33].b);
  foo ((size_t) &a.a[50].b - (size_t) &a);
 
  /* And this should not.  */
  foo ((size_t) &b - (size_t) b);
  return 0;
}
 
/* Two of the calls to foo should be folded to just foo(constant).  */
 
/* { dg-final { scan-tree-dump-times "foo \\(\[0-9\]*\\)" 2 "optimized" } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */