1 files changed, 44 insertions, 0 deletions
diff --git a/gcc/testsuite/obj-c++.dg/isa-field-1.mm b/gcc/testsuite/obj-c++.dg/isa-field-1.mm
new file mode 100644
index 00000000000..7afbafe7508
--- /dev/null
+++ b/gcc/testsuite/obj-c++.dg/isa-field-1.mm
@@ -0,0 +1,44 @@
+/* APPLE LOCAL file Objective-C */
+/* Ensure there are no bizarre difficulties with accessing the 'isa' field of objects.  */
+/* { dg-do compile } */
+
+#include <objc/Object.h>
+
+@interface Object (Test)
+- (Class) test1: (id)object;
+@end
+
+@interface Derived: Object
+- (Class) test2: (id)object;
+@end
+
+@implementation Object (Test)
+
+Class test1(id object) {
+    Class cls = object->isa;
+    return cls;
+}
+- (Class) test1: (id)object {
+    Class cls = object->isa;
+    return cls;
+}
+
+@end
+
+@implementation Derived
+
+Class test2(id object) {
+    Class cls = object->isa;
+    return cls;
+}
+- (Class) test2: (id)object {
+    Class cls = object->isa;
+    return cls;
+}
+
+@end
+
+Class test3(id object) {
+    Class cls = object->isa;
+    return cls;
+}