1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -Wuninitialized" } */
       3  
       4  int get_a_value ();
       5  void printk(const char *);
       6  void test_func()
       7  {
       8      int loop;
       9      while (!loop) {             /* { dg-warning "is used uninitialized" } */
      10  	loop = get_a_value();
      11  	printk("...");
      12      }
      13  }