1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-optimized" } */
       3  
       4  int f1(int a)
       5  {
       6    return a*6-a;
       7  }
       8  
       9  int f2(int a)
      10  {
      11    return a*4+a;
      12  }
      13  
      14  int f3(int a)
      15  {
      16    return 2*a + 3*a;
      17  }
      18  
      19  int f4(int a, int b)
      20  {
      21    return 2*a + 6*b;
      22  }
      23  
      24  int f5(int a, int b)
      25  {
      26    return 2*a - 6*b;
      27  }
      28  
      29  int f6(int a, int b)
      30  {
      31    return 6*a - 2*b;
      32  }
      33  
      34  /* { dg-final { scan-tree-dump-times "a_..D. \\\* 5" 3 "optimized" } } */
      35  /* { dg-final { scan-tree-dump-times " \\\* 2" 3 "optimized" } } */
      36  /* { dg-final { scan-tree-dump-not "\\\* 6" "optimized" } } */