1  /* PR 30437: Test -Wall 
       2     Don't change this without changing Wno-all.c as well.  */
       3  /* { dg-do compile } */
       4  /* { dg-options "-Wall" } */
       5  
       6  void foo(int a)
       7  {
       8    5 * (a == 1) | (a == 2);  /* { dg-warning "no effect" "no effect" } */
       9  }