rtx result;
rtx tem;
if (GET_CODE (op0) == CLOBBER)
return op0;
else if (GET_CODE (op1) == CLOBBER)
return op1;
if (GET_RTX_CLASS (code) == 'c'
&& swap_commutative_operands_p (op0, op1))
tem = op0, op0 = op1, op1 = tem;