1 files changed, 89 insertions, 0 deletions
diff --git a/test/Modules/objc-categories.m b/test/Modules/objc-categories.m
new file mode 100644
index 0000000000000..87aaa5c12cae3
--- /dev/null
+++ b/test/Modules/objc-categories.m
@@ -0,0 +1,89 @@
+// RUN: mkdir -p %t
+// RUN: %clang_cc1 -emit-module -o %t/diamond_top.pcm %s -D MODULE_TOP
+// RUN: %clang_cc1 -fmodule-cache-path %t -fdisable-module-hash -emit-module -o %t/diamond_left.pcm %s -D MODULE_LEFT
+// RUN: %clang_cc1 -fmodule-cache-path %t -fdisable-module-hash -emit-module -o %t/diamond_right.pcm %s -D MODULE_RIGHT
+// RUN: %clang_cc1 -fmodule-cache-path %t -fdisable-module-hash -emit-module -o %t/diamond_bottom.pcm %s -D MODULE_BOTTOM
+// RUN: %clang_cc1 -fmodule-cache-path %t -fdisable-module-hash %s -verify
+
+/*============================================================================*/
+#ifdef MODULE_TOP
+
+@interface Foo
+@end
+
+@interface Foo(Top)
+-(void)top;
+@end
+
+/*============================================================================*/
+#elif defined(MODULE_LEFT)
+
+__import_module__ diamond_top;
+
+@interface Foo(Left)
+-(void)left;
+@end
+
+@interface LeftFoo
+-(void)left;
+@end
+
+@interface Foo(Duplicate) // expected-note {{previous definition}}
+@end
+
+@interface Foo(Duplicate)
+@end
+
+/*============================================================================*/
+#elif defined(MODULE_RIGHT)
+
+__import_module__ diamond_top;
+
+@interface Foo(Right1)
+-(void)right1;
+@end
+
+@interface Foo(Right2)
+-(void)right2;
+@end
+
+@interface Foo(Duplicate) // expected-warning {{duplicate definition of category}}
+@end
+
+/*============================================================================*/
+#elif defined(MODULE_BOTTOM)
+
+__import_module__ diamond_left;
+
+@interface Foo(Bottom)
+-(void)bottom;
+@end
+
+__import_module__ diamond_right;
+
+@interface LeftFoo(Bottom)
+-(void)bottom;
+@end
+
+/*============================================================================*/
+#else
+
+__import_module__ diamond_bottom;
+
+@interface Foo(Source)
+-(void)source;
+@end
+
+void test(Foo *foo, LeftFoo *leftFoo) {
+  [foo source];
+  [foo bottom];
+  [foo left];
+  [foo right1];
+  [foo right2];
+  [foo top];
+
+  [leftFoo left];
+  [leftFoo bottom];
+}
+
+#endif