Do not optimize out ini_get() when the entry does not exist during compilation (#8507)

The entry may exist later if dl is enabled

Fixes GH-8466

Author: arnaud-lb

ext/opcache/Optimizer/sccp.c

@@ -939,6 +939,9 @@ static inline int ct_eval_func_call(
 
 			ini_entry = zend_hash_find_ptr(EG(ini_directives), Z_STR_P(args[0]));
 			if (!ini_entry) {
+				if (PG(enable_dl)) {
+					return FAILURE;
+				}
 				ZVAL_FALSE(result);
 			} else if (ini_entry->modifiable != ZEND_INI_SYSTEM) {
 				return FAILURE;