1 files changed, 48 insertions, 0 deletions
diff --git a/test/CodeGenCXX/mingw-template-dllexport.cpp b/test/CodeGenCXX/mingw-template-dllexport.cpp
new file mode 100644
index 0000000000..408a3fd0a7
--- /dev/null
+++ b/test/CodeGenCXX/mingw-template-dllexport.cpp
@@ -0,0 +1,48 @@
+// RUN: %clang_cc1 -emit-llvm -triple i686-mingw32 %s -o - | FileCheck %s
+
+#define JOIN2(x, y) x##y
+#define JOIN(x, y) JOIN2(x, y)
+#define UNIQ(name) JOIN(name, __LINE__)
+#define USEMEMFUNC(class, func) void (class::*UNIQ(use)())() { return &class::func; }
+
+template <class T>
+class c {
+  void f() {}
+};
+
+template class __declspec(dllexport) c<int>;
+
+// CHECK: define {{.*}} dllexport {{.*}} @_ZN1cIiE1fEv
+
+extern template class __declspec(dllexport) c<char>;
+template class c<char>;
+
+// CHECK: define {{.*}} dllexport {{.*}} @_ZN1cIcE1fEv
+
+extern template class c<double>;
+template class __declspec(dllexport) c<double>;
+
+// CHECK-NOT: define {{.*}} dllexport {{.*}} @_ZN1cIdE1fEv
+
+template <class T>
+struct outer {
+  void f();
+  struct inner {
+    void f();
+  };
+};
+
+template <class T> void outer<T>::f() {}
+template <class T> void outer<T>::inner::f() {}
+
+template class __declspec(dllexport) outer<int>;
+
+// CHECK: define {{.*}} dllexport {{.*}} @_ZN5outerIiE1fEv
+// CHECK-NOT: define {{.*}} dllexport {{.*}} @_ZN5outerIiE5inner1fEv
+
+extern template class __declspec(dllimport) outer<char>;
+USEMEMFUNC(outer<char>, f)
+USEMEMFUNC(outer<char>::inner, f)
+
+// CHECK: declare dllimport {{.*}} @_ZN5outerIcE1fEv
+// CHECK: define {{.*}} @_ZN5outerIcE5inner1fEv