Use interned string for calling count() in Zend VM

Similar to f0dd79a

Copied from GH-7695

Author: TysonAndre

Zend/zend_string.h

@@ -574,6 +574,7 @@ EMPTY_SWITCH_DEFAULT_CASE()
 	_(ZEND_STR_OFFSETSET,              "offsetset") \
 	_(ZEND_STR_OFFSETEXISTS,           "offsetexists") \
 	_(ZEND_STR_OFFSETUNSET,            "offsetunset") \
+	_(ZEND_STR_COUNT,                  "count") \
 
 
 typedef enum _zend_known_string_id {

Zend/zend_vm_def.h

@@ -9086,7 +9086,8 @@ ZEND_VM_COLD_CONST_HANDLER(190, ZEND_COUNT, CONST|TMPVAR|CV, UNUSED)
 			if (zend_class_implements_interface(zobj->ce, zend_ce_countable)) {
 				zval retval;
 
-				zend_call_method_with_0_params(zobj, NULL, NULL, "count", &retval);
+				zend_function *count_fn = zend_hash_find_ptr(&zobj->ce->function_table, ZSTR_KNOWN(ZEND_STR_COUNT));
+				zend_call_known_instance_method_with_0_params(count_fn, zobj, &retval);
 				count = zval_get_long(&retval);
 				zval_ptr_dtor(&retval);
 				break;

Zend/zend_vm_execute.h

@@ -10564,7 +10564,8 @@ static ZEND_VM_COLD ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL ZEND_COUNT_SPEC_CONST_
 			if (zend_class_implements_interface(zobj->ce, zend_ce_countable)) {
 				zval retval;
 
-				zend_call_method_with_0_params(zobj, NULL, NULL, "count", &retval);
+				zend_function *count_fn = zend_hash_find_ptr(&zobj->ce->function_table, ZSTR_KNOWN(ZEND_STR_COUNT));
+				zend_call_known_instance_method_with_0_params(count_fn, zobj, &retval);
 				count = zval_get_long(&retval);
 				zval_ptr_dtor(&retval);
 				break;
@@ -17857,7 +17858,8 @@ static ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL ZEND_COUNT_SPEC_TMPVAR_UNUSED_HANDL
 			if (zend_class_implements_interface(zobj->ce, zend_ce_countable)) {
 				zval retval;
 
-				zend_call_method_with_0_params(zobj, NULL, NULL, "count", &retval);
+				zend_function *count_fn = zend_hash_find_ptr(&zobj->ce->function_table, ZSTR_KNOWN(ZEND_STR_COUNT));
+				zend_call_known_instance_method_with_0_params(count_fn, zobj, &retval);
 				count = zval_get_long(&retval);
 				zval_ptr_dtor(&retval);
 				break;
@@ -47584,7 +47586,8 @@ static ZEND_OPCODE_HANDLER_RET ZEND_FASTCALL ZEND_COUNT_SPEC_CV_UNUSED_HANDLER(Z
 			if (zend_class_implements_interface(zobj->ce, zend_ce_countable)) {
 				zval retval;
 
-				zend_call_method_with_0_params(zobj, NULL, NULL, "count", &retval);
+				zend_function *count_fn = zend_hash_find_ptr(&zobj->ce->function_table, ZSTR_KNOWN(ZEND_STR_COUNT));
+				zend_call_known_instance_method_with_0_params(count_fn, zobj, &retval);
 				count = zval_get_long(&retval);
 				zval_ptr_dtor(&retval);
 				break;

ext/standard/array.c

@@ -702,18 +702,20 @@ PHP_FUNCTION(count)
 		case IS_OBJECT: {
 			zval retval;
 			/* first, we check if the handler is defined */
-			if (Z_OBJ_HT_P(array)->count_elements) {
+			zend_object *zobj = Z_OBJ_P(array);
+			if (zobj->handlers->count_elements) {
 				RETVAL_LONG(1);
-				if (SUCCESS == Z_OBJ_HT(*array)->count_elements(Z_OBJ_P(array), &Z_LVAL_P(return_value))) {
+				if (SUCCESS == zobj->handlers->count_elements(zobj, &Z_LVAL_P(return_value))) {
 					return;
 				}
 				if (EG(exception)) {
 					RETURN_THROWS();
 				}
 			}
 			/* if not and the object implements Countable we call its count() method */
-			if (instanceof_function(Z_OBJCE_P(array), zend_ce_countable)) {
-				zend_call_method_with_0_params(Z_OBJ_P(array), NULL, NULL, "count", &retval);
+			if (instanceof_function(zobj->ce, zend_ce_countable)) {
+				zend_function *count_fn = zend_hash_find_ptr(&zobj->ce->function_table, ZSTR_KNOWN(ZEND_STR_COUNT));
+				zend_call_known_instance_method_with_0_params(count_fn, zobj, &retval);
 				if (Z_TYPE(retval) != IS_UNDEF) {
 					RETVAL_LONG(zval_get_long(&retval));
 					zval_ptr_dtor(&retval);