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struct s { volatile struct s *next; };

void __attribute__((noinline))

bar (int ignored, int n)

{

  asm volatile ("");

}

int __attribute__((noinline))

foo (volatile struct s *ptr, int n)

{

  int i;

  bar (0, n);

  for (i = 0; i < n; i++)

    ptr = ptr->next;

}

int main (void)

{

  volatile struct s rec = { &rec };

  foo (&rec, 10);

  return 0;

}