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/* PRs target/15569, rtl-optimization/15681 */

/* { dg-do compile } */

/* { dg-options "-Os -frename-registers" } */

/* { dg-options "-mconstant-gp -Os -frename-registers" { target ia64-*-* } } */

struct S { struct S *a, *b; };

struct T { struct S e; unsigned long a; int b, c; void *d; } f;

unsigned long f1 (unsigned long);

void f2 (int, struct T *);

void *f3 (void *);

unsigned long volatile g;

static void

f4 (struct T *p)

{

  f1 (f1 (((unsigned long) g - p->a) >> 20));

}

static struct T *

f5 (void)

{

  struct T *g, *p;

  struct T *q = 0;

  for (g = p = &f; (g = p = (struct T *) (g->e.a)) != &f;)

    if (p->b)

      {

        f4 (p);

        if (p->c & 0x80000)

          return p;

      }

  return q;

}

static void

f6 (struct T *p)

{

  f2 (9, p);

}

static inline void *

f7 (struct T *t)

{

  void *d;

  d = t->d;

  if (d)

    d = f3 (d);

  return d;

}

static void *

f8 (struct T *p)

{

  void *d = f7 (p);

  if (!d)

    return 0;

  f6 (p);

  return d;

}

static void

f9 (void)

{

  struct T *p;

  p = f5 ();

  f8 (p);

}

void

test (void)

{

  f9 ();

}