/* { dg-do compile } *//* { dg-options "-O1 -fdump-tree-vars" } */struct{  struct    {      int a;      int b;    } a[100];} a;typedef __SIZE_TYPE__ size_t;void foo(size_t);size_t *bar (void);intmain (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 "vars" } } *//* { dg-final { cleanup-tree-dump "vars" } } */