known_condition_true
known_condition_true(stmt->if_conditional) && __path_is_null()) {
int known_condition_true(struct expression *expr);
if (known_condition_true(stmt->if_conditional)) {
if (known_condition_true(expr->conditional)) {
if (known_condition_true(expr->conditional)) {
if (known_condition_true(expr->unop)) {
if (known_condition_true(expr))
if (known_condition_true(expr->conditional))
if (known_condition_true(expr->conditional))