1  /* { dg-do compile } */
       2  /* { dg-options "-Wshift-count-overflow" } */
       3  
       4  void foo()
       5  {
       6    unsigned i1 = 1U << (sizeof(unsigned) * __CHAR_BIT__); /* { dg-warning "20:left shift count >= width of type" } */
       7    unsigned i2 = 1U >> (sizeof(unsigned) * __CHAR_BIT__); /* { dg-warning "20:right shift count >= width of type" } */
       8  }