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/* { dg-do compile } */

/* { dg-options "-O2 -ftree-loop-distribution" } */

#define NULL ((void *)0)

__extension__ typedef __SIZE_TYPE__ size_t;

extern void *foo(size_t nelem, size_t elsize);

extern void bar (char*, ...);

typedef struct alt_state *alt_state_t;

typedef struct state *state_t;

struct alt_state

{

  alt_state_t next_alt_state;

};

static alt_state_t first_free_alt_state = NULL;

static void

free_alt_state (alt_state_t alt_state)

{

  if (alt_state == NULL)

    return;

  alt_state->next_alt_state = first_free_alt_state;

  first_free_alt_state = alt_state;

}

/* The function frees list started with node ALT_STATE_LIST.  */

static void

free_alt_states (alt_state_t alt_states_list)

{

  alt_state_t curr_alt_state;

  alt_state_t next_alt_state;

  for (curr_alt_state = alt_states_list;

       curr_alt_state != NULL;

       curr_alt_state = next_alt_state)

    {

      next_alt_state = curr_alt_state->next_alt_state;

      free_alt_state (curr_alt_state);

    }

}

int

main (void)

{

  int i;

  alt_state_t state, act_state;

  act_state = state = foo (1, sizeof (struct alt_state));

  for (i = 0; i < 2; i ++)

  {

    act_state->next_alt_state = foo (1, sizeof (struct alt_state));

    act_state = act_state->next_alt_state;

  }

  free_alt_states (state);

  for (act_state = first_free_alt_state;

       act_state != NULL;

       act_state = act_state->next_alt_state)

       bar ("going from %p to %p\n", act_state, act_state->next_alt_state);

  return 0;

}