1 files changed, 47 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 000000000..4b93df8c4
--- /dev/null
+++ b/gcc/testsuite/obj-c++.dg/isa-field-1.mm
@@ -0,0 +1,47 @@
+/* Ensure there are no bizarre difficulties with accessing the 'isa' field of
+  objects.  This field is named differently between GNU and NeXT runtimes so
+  accessed via the CLASSPTRFIELD() macro defined in next-mapping.h */
+/* { dg-do compile } */
+
+#include "../objc-obj-c++-shared/Object1.h"
+#include "../objc-obj-c++-shared/next-mapping.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 = CLASSPTRFIELD(object);
+  return cls;
+}
+- (Class) test1: (id)object {
+  Class cls = CLASSPTRFIELD(object);
+  return cls;
+}
+
+@end
+
+@implementation Derived
+
+Class test2(id object) {
+  Class cls = CLASSPTRFIELD(object);
+  return cls;
+}
+- (Class) test2: (id)object {
+  Class cls = CLASSPTRFIELD(object);
+  return cls;
+}
+
+@end
+
+Class test3(id object) {
+  Class cls = CLASSPTRFIELD(object);
+  return cls;
+}
+#include "../objc-obj-c++-shared/Object1-implementation.h"