get_reg_value
reg2 = get_reg_value(left, get_regclass(expr->left));
reg = get_reg_value(right, ®class_32);
dest = get_reg_value(right, ®class_32);
src = get_reg_value(left, ®class_32);
reg = get_reg_value(val, ®class_32);
reg_cond = get_reg_value(cond, get_regclass(expr->conditional));
reg_true = get_reg_value(stot, get_regclass(expr));
reg_false = get_reg_value(stof, get_regclass(expr));