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extern __attribute__ ((__noreturn__)) void exit(int);

extern __attribute__ ((__noreturn__)) void abort(void);

__attribute__ ((__noinline__))

int

add512(int a, int *b)

{

  int c = a + 512;

  if (c != 0)

    *b = a;

  return c;

}

__attribute__ ((__noinline__))

int

add513(int a, int *b)

{

  int c = a + 513;

  if (c == 0)

    *b = a;

  return c;

}

int main(void)

{

  int b0 = -1;

  int b1 = -1;

  if (add512(-512, &b0) != 0 || b0 != -1 || add513(-513, &b1) != 0 || b1 != -513)

    abort ();

  exit (0);

}