1 files changed, 63 insertions, 0 deletions
diff --git a/gcc/testsuite/objc.dg/objc-gc-4.m b/gcc/testsuite/objc.dg/objc-gc-4.m
new file mode 100644
index 00000000000..df0a44cd8dd
--- /dev/null
+++ b/gcc/testsuite/objc.dg/objc-gc-4.m
@@ -0,0 +1,63 @@
+/* Test looking up fields in superclasses in the context of write-barriers
+   (where component references get rewritten).  */
+/* Contributed by Ziemowit Laski <zlaski@apple.com>  */
+
+/* { dg-do compile { target *-*-darwin* } } */
+/* { dg-options "-fobjc-gc" } */
+
+#include <objc/Object.h>
+
+@class MyWindow;
+
+@interface MyDocument : Object {
+    MyWindow *_window;
+}
+@end
+
+@interface MyFileDocument : MyDocument {
+     struct {
+        unsigned int autoClose:1;
+        unsigned int openForUI:1;
+        unsigned int isClosing:1;
+        unsigned int needsDiskCheck:1;
+        unsigned int isWritable:1;
+        unsigned int representsFileOnDisk:1;
+        unsigned int RESERVED:26;
+    } _fdFlags;
+}
+@end
+
+@interface MyTextFileDocument : MyFileDocument {
+    Object *_textStorage;
+    struct __tfdFlags {
+        unsigned int immutable:1;
+        unsigned int lineEnding:2;
+        unsigned int isClosing:1;
+        unsigned int settingsAreSet:1;
+        unsigned int usesTabs:1;
+        unsigned int isUTF8WithBOM:1;
+        unsigned int wrapsLines:1;
+        unsigned int usingDefaultLanguage:1;
+        unsigned int RESERVED:23;
+    } _tfdFlags;
+    int _tabWidth;
+    int _indentWidth;
+}
+@end
+
+@interface MyRTFFileDocument : MyTextFileDocument
+- (BOOL)readFromFile:(const char *)fileName ofType:(const char *)type;
+@end
+
+@implementation MyRTFFileDocument
+- (BOOL)readFromFile:(const char *)fileName ofType:(const char *)type {
+        if (_textStorage && fileName) {
+            [_textStorage free];
+	    return YES;
+        } else if (type) {
+            _textStorage = [MyRTFFileDocument new];
+	    return NO;
+        }
+   return (fileName && type);
+}
+@end