/* { 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; } /* { dg-final { scan-tree-dump-times "return 0" 1 "optimized" } } */ /* { dg-final { cleanup-tree-dump "optimized" } } */