1  /* { dg-do compile }  */
       2  /* { dg-options "-O2 -fdump-rtl-combine" }  */
       3  
       4  int a;
       5  
       6  double b1() {
       7    int c = a << 1;
       8    return 1 - c;
       9  }
      10  
      11  double b2() {
      12    int c = a << 2;
      13    return 1 - c;
      14  }
      15  
      16  double b3() {
      17    int c = a << 3;
      18    return 1 - c;
      19  }
      20  
      21  /* { dg-final { scan-rtl-dump-times "\\*sub_n" 3 "combine" } } */