gcc/testsuite/gcc.dg/torture/pr61964.c

   1 /* { dg-do run } */
   2
   3 extern void abort (void);
   4
   5 struct node { struct node *next, *prev; } node;
   6 struct head { struct node *first; } heads[5];
   7 int k = 2;
   8 struct head *head = &heads[2];
   9
  10 static int __attribute__((noinline))
  11 foo()
  12 {
  13   node.prev = (void *)head;
  14   head->first = &node;
  15
  16   struct node *n = head->first;
  17   struct head *h = &heads[k];
  18
  19   if (n->prev == (void *)h)
  20     h->first = n->next;
  21   else
  22     n->prev->next = n->next;
  23
  24   n->next = h->first;
  25   return n->next == &node;
  26 }
  27
  28 int main()
  29 {
  30   if (foo ())
  31     abort ();
  32   return 0;
  33 }