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diff --git a/clang/test/SemaTemplate/temp_explicit.cpp b/clang/test/SemaTemplate/temp_explicit.cpp
new file mode 100644
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+++ b/clang/test/SemaTemplate/temp_explicit.cpp
@@ -0,0 +1,151 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -pedantic -Wc++11-compat %s
+//
+// Tests explicit instantiation of templates.
+template<typename T, typename U = T> class X0 { };
+
+namespace N {
+  template<typename T, typename U = T> class X1 { };
+}
+
+// Check the syntax of explicit instantiations.
+template class X0<int, float>;
+template class X0<int>; // expected-note{{previous}}
+
+template class N::X1<int>;
+template class ::N::X1<int, float>;
+
+using namespace N;
+
+// Check for some bogus syntax that probably means that the user
+// wanted to write an explicit specialization, but forgot the '<>'
+// after 'template'.
+template class X0<double> { }; // expected-error{{explicit specialization}}
+
+// Check for explicit instantiations that come after other kinds of
+// instantiations or declarations.
+template class X0<int, int>; // expected-error{{duplicate}}
+
+template<> class X0<char> { }; // expected-note{{previous}}
+template class X0<char>; // expected-warning{{ignored}}
+
+void foo(X0<short>) { }
+template class X0<short>;
+
+// Check that explicit instantiations actually produce definitions. We
+// determine whether this happens by placing semantic errors in the
+// definition of the template we're instantiating.
+template<typename T> struct X2; // expected-note{{declared here}}
+
+template struct X2<float>; // expected-error{{undefined template}}
+
+template<typename T>
+struct X2 {
+  void f0(T*); // expected-error{{pointer to a reference}}
+};
+
+template struct X2<int>; // okay
+template struct X2<int&>; // expected-note{{in instantiation of}}
+
+// Check that explicit instantiations instantiate member classes.
+template<typename T> struct X3 {
+  struct Inner {
+    void f(T*); // expected-error{{pointer to a reference}}
+  };
+};
+
+void f1(X3<int&>); // okay, Inner, not instantiated
+
+template struct X3<int&>; // expected-note{{instantiation}}
+
+template<typename T> struct X4 {
+  struct Inner {
+    struct VeryInner {
+      void f(T*); // expected-error 2{{pointer to a reference}}
+    };
+  };
+};
+
+void f2(X4<int&>); // okay, Inner, not instantiated
+void f3(X4<int&>::Inner); // okay, Inner::VeryInner, not instantiated
+
+template struct X4<int&>; // expected-note{{instantiation}}
+template struct X4<float&>; // expected-note{{instantiation}}
+
+// Check explicit instantiation of member classes
+namespace N2 {
+
+template<typename T>
+struct X5 {
+  struct Inner1 {
+    void f(T&);
+  };
+
+  struct Inner2 { // expected-note {{here}}
+    struct VeryInner {
+      void g(T*); // expected-error 2{{pointer to a reference}}
+    };
+  };
+};
+
+}
+
+template struct N2::X5<void>::Inner2;
+
+using namespace N2;
+template struct X5<int&>::Inner2; // expected-note{{instantiation}}
+
+void f4(X5<float&>::Inner2);
+template struct X5<float&>::Inner2; // expected-note{{instantiation}}
+
+namespace N3 {
+  template struct N2::X5<int>::Inner2; // expected-warning {{explicit instantiation of 'Inner2' not in a namespace enclosing 'N2'}}
+}
+
+struct X6 {
+  struct Inner { // expected-note{{here}}
+    void f();
+  };
+};
+
+template struct X6::Inner; // expected-error{{non-templated}}
+
+// PR5559
+template <typename T>
+struct Foo;
+
+template <>
+struct Foo<int> // expected-note{{header not required for explicitly-specialized}}
+{
+    template <typename U>
+    struct Bar
+    {};
+};
+
+template <> // expected-warning{{extraneous template parameter list}}
+template <>
+struct Foo<int>::Bar<void>
+{};
+
+namespace N1 {
+
+  template<typename T> struct X7 { }; // expected-note{{here}}
+
+  namespace Inner {
+    template<typename T> struct X8 { };
+  }
+
+  template struct X7<int>;
+  template struct Inner::X8<int>;
+}
+
+template<typename T> struct X9 { }; // expected-note{{here}}
+
+template struct ::N1::Inner::X8<float>;
+
+namespace N2 {
+  using namespace N1;
+
+  template struct X7<double>; // expected-warning{{must occur in namespace}}
+
+  template struct X9<float>; // expected-warning{{must occur at global scope}}
+}