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/* { dg-do run } */

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

/* Ensure that BIT_FIELD_REFs gets the appropriate VUSE.

   Contributed by Paolo Bonzini  <bonzini@gnu.org>.

   This testcase actually never triggered in the CVS repo, but it did

   in my local tree and it seems worth testing.  In this test, the if's

   are folded to BIT_FIELD_REFs but the VUSEs were erroneously left out.

   Therefore, DOM did not see that i was modified between the two ifs

   and optimized away the second if.  */

extern void abort (void);

extern void exit (int);

struct x

{

  unsigned b:1;

  unsigned c:1;

};

struct x i = { 1, 1 };

int

main ()

{

  i.b = 1;

  if (i.b == 1 && i.c == 0)

    exit (0);

  i.c = 0;

  if (i.b == 1 && i.c == 0)

    exit (0);

  abort ();

}