Use faster API too look up property info in object handlers

We have the proprerty offset here and know it's valid, so we can
use our property helper table to fetch it, rather than doing a
full property info lookup.

Author: nikic

Zend/zend_object_handlers.c

@@ -629,6 +629,16 @@ ZEND_API uint32_t *zend_get_property_guard(zend_object *zobj, zend_string *membe
 }
 /* }}} */
 
+static zend_always_inline zend_property_info *prop_info_for_offset(
+		zend_object *obj, uint32_t prop_offset, void **cache_slot) {
+	if (cache_slot) {
+		return cache_slot[2];
+	} else {
+		zend_property_info *info = zend_get_property_info_for_slot(obj, OBJ_PROP(obj, prop_offset));
+		return (info && info->type) ? info : NULL;
+	}
+}
+
 ZEND_API zval *zend_std_read_property(zval *object, zval *member, int type, void **cache_slot, zval *rv) /* {{{ */
 {
 	zend_object *zobj;
@@ -743,7 +753,8 @@ ZEND_API zval *zend_std_read_property(zval *object, zval *member, int type, void
 
 			if (UNEXPECTED(ZEND_CLASS_HAS_TYPE_HINTS(zobj->ce) &&
 				IS_VALID_PROPERTY_OFFSET(property_offset) &&
-				(prop_info = zend_object_fetch_property_type_info(Z_OBJCE_P(object), name, cache_slot)))) {
+				(prop_info = prop_info_for_offset(Z_OBJ_P(object), property_offset, cache_slot)))
+			) {
 				zend_verify_prop_assignable_by_ref(prop_info, retval, (zobj->ce->__get->common.fn_flags & ZEND_ACC_STRICT_TYPES) != 0);
 			}
 
@@ -760,7 +771,7 @@ ZEND_API zval *zend_std_read_property(zval *object, zval *member, int type, void
 
 	if (type != BP_VAR_IS) {
 		if (IS_VALID_PROPERTY_OFFSET(property_offset) &&
-			(prop_info = zend_object_fetch_property_type_info(Z_OBJCE_P(object), name, cache_slot))) {
+			(prop_info = prop_info_for_offset(Z_OBJ_P(object), property_offset, cache_slot))) {
 			zend_throw_error(NULL, "Typed property %s::$%s must not be accessed before initialization",
 				ZSTR_VAL(prop_info->ce->name),
 				ZSTR_VAL(name));
@@ -793,7 +804,7 @@ ZEND_API zval *zend_std_write_property(zval *object, zval *member, zval *value,
 	if (EXPECTED(IS_VALID_PROPERTY_OFFSET(property_offset))) {
 		variable_ptr = OBJ_PROP(zobj, property_offset);
 		if (Z_TYPE_P(variable_ptr) != IS_UNDEF) {
-			zend_property_info *prop_info = zend_object_fetch_property_type_info(Z_OBJCE_P(object), name, cache_slot);
+			zend_property_info *prop_info = prop_info_for_offset(Z_OBJ_P(object), property_offset, cache_slot);
 
 			Z_TRY_ADDREF_P(value);
 
@@ -858,7 +869,7 @@ ZEND_API zval *zend_std_write_property(zval *object, zval *member, zval *value,
 
 			variable_ptr = OBJ_PROP(zobj, property_offset);
 
-			if (UNEXPECTED(prop_info = zend_object_fetch_property_type_info(Z_OBJCE_P(object), name, cache_slot))) {
+			if (UNEXPECTED(prop_info = prop_info_for_offset(Z_OBJ_P(object), property_offset, cache_slot))) {
 				ZVAL_COPY_VALUE(&tmp, value);
 				if (UNEXPECTED(!zend_verify_property_type(prop_info, &tmp, ZEND_CALL_USES_STRICT_TYPES(EG(current_execute_data))))) {
 					zval_ptr_dtor(value);