gcc/4.2.2/libmudflap/testsuite/libmudflap.c/heap-scalestress.c:53-59

   53:             {                  /* add at head */
   54:               p->next = head;
   55:               if (NULL == tail)
   56:                 tail = p;
   57:               head = p;
   58:             }
   59:         }