1 files changed, 28 insertions, 0 deletions
diff --git a/clang/test/Modules/decldef.mm b/clang/test/Modules/decldef.mm
new file mode 100644
index 0000000..64a66d5
--- /dev/null
+++ b/clang/test/Modules/decldef.mm
@@ -0,0 +1,28 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fmodules -I %S/Inputs -fmodule-cache-path %t %s -verify
+
+
+// in other file: expected-note{{previous definition is here}}
+
+
+
+
+
+// in other file: expected-note{{previous definition is here}}
+
+@__experimental_modules_import decldef;
+A *a1; // expected-error{{unknown type name 'A'}}
+B *b1; // expected-error{{unknown type name 'B'}}
+@__experimental_modules_import decldef.Decl;
+
+A *a2;
+B *b;
+
+void testA(A *a) {
+  a->ivar = 17; // expected-error{{definition of 'A' must be imported before it is required}}
+}
+
+void testB() {
+  B b; // expected-error{{definition of 'B' must be imported before it is required}}
+  B b2; // Note: the reundant error was silenced.
+}