1 /* { dg-do compile } */ 2 /* { dg-options "-O2 -fdump-tree-reassoc1" } */ main(int a,int b,int c,int d)3int main(int a, int b, int c, int d) 4 { 5 /* All the xor's cancel each other out, leaving 0 */ 6 int e = (a ^ b) ^ (c ^ d); 7 int f = (c ^ a) ^ (b ^ d); 8 return e ^ f; 9 } 10 /* { dg-final { scan-tree-dump-times "= 0" 1 "reassoc1"} } */ 11