1 files changed, 86 insertions, 0 deletions
diff --git a/test/SemaCXX/undefined-internal.cpp b/test/SemaCXX/undefined-internal.cpp
new file mode 100644
index 0000000..bb87ce0
--- /dev/null
+++ b/test/SemaCXX/undefined-internal.cpp
@@ -0,0 +1,86 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+// Make sure we don't produce invalid IR.
+// RUN: %clang_cc1 -emit-llvm-only %s
+
+namespace test1 {
+  static void foo(); // expected-warning {{function 'test1::foo' has internal linkage but is not defined}}
+  template <class T> static void bar(); // expected-warning {{function 'test1::bar<int>' has internal linkage but is not defined}}
+
+  void test() {
+    foo(); // expected-note {{used here}}
+    bar<int>(); // expected-note {{used here}}
+  }
+}
+
+namespace test2 {
+  namespace {
+    void foo(); // expected-warning {{function 'test2::<anonymous namespace>::foo' has internal linkage but is not defined}}
+    extern int var; // expected-warning {{variable 'test2::<anonymous namespace>::var' has internal linkage but is not defined}}
+    template <class T> void bar(); // expected-warning {{function 'test2::<anonymous namespace>::bar<int>' has internal linkage but is not defined}}
+  }
+  void test() {
+    foo(); // expected-note {{used here}}
+    var = 0; // expected-note {{used here}}
+    bar<int>(); // expected-note {{used here}}
+  }
+}
+
+namespace test3 {
+  namespace {
+    void foo();
+    extern int var;
+    template <class T> void bar();
+  }
+
+  void test() {
+    foo();
+    var = 0;
+    bar<int>();
+  }
+
+  namespace {
+    void foo() {}
+    int var = 0;
+    template <class T> void bar() {}
+  }
+}
+
+namespace test4 {
+  namespace {
+    struct A {
+      A(); // expected-warning {{function 'test4::<anonymous namespace>::A::A' has internal linkage but is not defined}}
+      ~A();// expected-warning {{function 'test4::<anonymous namespace>::A::~A' has internal linkage but is not defined}}
+      virtual void foo(); // expected-warning {{function 'test4::<anonymous namespace>::A::foo' has internal linkage but is not defined}}
+      virtual void bar() = 0;
+      virtual void baz(); // expected-warning {{function 'test4::<anonymous namespace>::A::baz' has internal linkage but is not defined}}
+    };
+  }
+
+  void test(A &a) {
+    a.foo(); // expected-note {{used here}}
+    a.bar();
+    a.baz(); // expected-note {{used here}}
+  }
+
+  struct Test : A {
+    Test() {} // expected-note 2 {{used here}}
+  };
+}
+
+// rdar://problem/9014651
+namespace test5 {
+  namespace {
+    struct A {};
+  }
+
+  template <class N> struct B {
+    static int var; // expected-warning {{variable 'test5::B<test5::<anonymous>::A>::var' has internal linkage but is not defined}}
+    static void foo(); // expected-warning {{function 'test5::B<test5::<anonymous>::A>::foo' has internal linkage but is not defined}}
+  };
+
+  void test() {
+    B<A>::var = 0; // expected-note {{used here}}
+    B<A>::foo(); // expected-note {{used here}}
+  }
+}