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/* PR tree-optimization/33136 */

/* { dg-do run } */

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

extern void abort (void);

struct S

{

  void *a;

  int b;

  int *c;

};

static int d, e;

static struct S s;

static int *

__attribute__((noinline, const))

foo (void)

{

  return &s.b;

}

int *

__attribute__((noinline))

bar (int **f)

{

  s.c = &d;

  *f = &e;

  /* As nothing ever takes the address of any int * field in struct S,

     the write to *f can't alias with the s.c field.  */

  return s.c;

}

int

__attribute__((noinline))

baz (int *x)

{

  s.b = 1;

  *x = 4;

  /* Function foo takes address of an int field in struct S,

     so *x can alias with the s.b field (and it does in this testcase).  */

  return s.b;

}

int

__attribute__((noinline))

t (void)

{

  int *f = (int *) 0;

  return 10 * (bar (&f) != &d) + baz (foo ());

}

int

main (void)

{

  if (t () != 4)

    abort ();

  return 0;

}