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/* { dg-do compile } */

/* { dg-options "-O2 -Wall" } */

struct g { long a; };

unsigned long f(struct g *a) { return *(unsigned long *)&a->a; }

struct A

{

  void *a;

};

int g(const struct A *x, long *y)

{

  typedef long __attribute__ ((may_alias)) long_a;

  *y = *(const long_a *) (&x->a);

  return 1;

}

void *a;

int

f0 (long *y)

{

  *y = *(const long *) &a; /* { dg-warning "will break" } */

  return 1;

}

int

f1 (long *y)

{

  typedef long __attribute__ ((may_alias)) long_a;

  *y = *(const long_a *) &a;

  return 1;

}

int

f2 (long *y)

{

  *y = *(const long *) &a; /* { dg-warning "will break" } */

  return 1;

}