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// Test -Waddress for testing an address against NULL.

// Origin: Ian Lance Taylor 

// { dg-do compile }

// { dg-options "-Waddress" }

extern int foo (int);

int i;

void

bar (int a)

{

 lab:

  if (foo)      // { dg-warning "always evaluate as" "correct warning" }

    foo (0);

  if (foo (1))

    ;

  if (&i)       // { dg-warning "always evaluate as" "correct warning" }

    foo (2);

  if (i)

    foo (3);

  if (&a)       // { dg-warning "always evaluate as" "correct warning" }

    foo (4);

  if (a)

    foo (5);

  if (&&lab)    // { dg-warning "always evaluate as" "correct warning" }

    foo (6);

  if (foo == 0) // { dg-warning "never be NULL" "correct warning" }

    foo (7);

  if (foo (1) == 0)

    foo (8);

  if (&i == 0)  // { dg-warning "never be NULL" "correct warning" }

    foo (9);

  if (i == 0)

    foo (10);

  if (&a == 0)  // { dg-warning "never be NULL" "correct warning" }

    foo (11);

  if (a == 0)

    foo (12);

  if (&&lab == 0) // { dg-warning "never be NULL" "correct warning" }

    foo (13);

  if (0 == foo) // { dg-warning "never be NULL" "correct warning" }

    foo (14);

  if (0 == foo (1))

    foo (15);

  if (0 == &i)  // { dg-warning "never be NULL" "correct warning" }

    foo (16);

  if (0 == i)

    foo (17);

  if (0 == &a)  // { dg-warning "never be NULL" "correct warning" }

    foo (18);

  if (0 == a)

    foo (19);

  if (0 == &&lab) // { dg-warning "never be NULL" "correct warning" }

    foo (20);

}