| /* { dg-do compile } */ |
| /* { dg-options "-O2 -fdump-tree-optimized" } */ |
| |
| int f (int a0,int a1,int a2,int a3,int a4) |
| { |
| int b0, b1, b2, b3, b4,e; |
| /* this can be optimized to four additions... */ |
| b4 = a4 + a3 + a2 + a1 + a0; |
| b3 = a3 + a2 + a1 + a0; |
| b2 = a2 + a1 + a0; |
| b1 = a1 + a0; |
| /* This is actually 0 */ |
| e = b4 - b3 + b2 - b1 - a4 - a2; |
| return e; |
| } |
| |
| /* We can't reassociate the expressions due to undefined signed overflow. */ |
| |
| /* { dg-final { scan-tree-dump-times "return 0" 1 "optimized" { xfail *-*-* } } } */ |
| /* { dg-final { cleanup-tree-dump "optimized" } } */ |
