1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized" } */
       3  
       4  int f (int a0,int a1,int a2,int a3,int a4) 
       5  { 
       6  int b0, b1, b2, b3, b4,e; 
       7    /* this can be optimized to four additions... */ 
       8    b4 = a4 + a3 + a2 + a1 + a0; 
       9    b3 = a3 + a2 + a1 + a0; 
      10    b2 = a2 + a1 + a0; 
      11    b1 = a1 + a0; 
      12    /* This is actually 0 */
      13    e = b4 - b3 + b2 - b1 - a4 - a2;
      14    return e;
      15  }
      16  
      17  /* We can't reassociate the expressions due to undefined signed overflow.  */
      18  
      19  /* { dg-final { scan-tree-dump-times "return 0" 1 "optimized" { xfail *-*-* } } } */