apply suggestions from code review

Author: LamentXU123

Zend/zend_vm_def.h

@@ -4491,6 +4491,21 @@ ZEND_VM_COLD_CONST_HANDLER(124, ZEND_VERIFY_RETURN_TYPE, CONST|TMP|VAR|UNUSED|CV
 			ZVAL_DEREF(retval_ptr);
 		}
 
+		if (EXPECTED(ZEND_TYPE_CONTAINS_CODE(ret_info->type, Z_TYPE_P(retval_ref)))) {
+			ZEND_VM_NEXT_OPCODE();
+		}
+
+		if (OP1_TYPE == IS_CV && UNEXPECTED(Z_ISUNDEF_P(retval_ptr))) {
+			SAVE_OPLINE();
+			retval_ref = retval_ptr = ZVAL_UNDEFINED_OP1();
+			if (UNEXPECTED(EG(exception))) {
+				HANDLE_EXCEPTION();
+			}
+			if (ZEND_TYPE_FULL_MASK(ret_info->type) & MAY_BE_NULL) {
+				ZEND_VM_NEXT_OPCODE();
+			}
+		}
+
 		zend_reference *ref = NULL;
 		if (UNEXPECTED(retval_ref != retval_ptr)) {
 			if (UNEXPECTED(EX(func)->op_array.fn_flags & ZEND_ACC_RETURN_REFERENCE)) {
@@ -4505,19 +4520,7 @@ ZEND_VM_COLD_CONST_HANDLER(124, ZEND_VERIFY_RETURN_TYPE, CONST|TMP|VAR|UNUSED|CV
 				}
 				retval_ptr = retval_ref;
 			}
-		}
-
-		if (EXPECTED(ZEND_TYPE_CONTAINS_CODE(ret_info->type, Z_TYPE_P(retval_ptr)))) {
-			ZEND_VM_NEXT_OPCODE();
-		}
-
-		if (OP1_TYPE == IS_CV && UNEXPECTED(Z_ISUNDEF_P(retval_ptr))) {
-			SAVE_OPLINE();
-			retval_ref = retval_ptr = ZVAL_UNDEFINED_OP1();
-			if (UNEXPECTED(EG(exception))) {
-				HANDLE_EXCEPTION();
-			}
-			if (ZEND_TYPE_FULL_MASK(ret_info->type) & MAY_BE_NULL) {
+			if (EXPECTED(ZEND_TYPE_CONTAINS_CODE(ret_info->type, Z_TYPE_P(retval_ptr)))) {
 				ZEND_VM_NEXT_OPCODE();
 			}
 		}