Check in LLVM r95781.
diff --git a/test/SemaCXX/access-base-class.cpp b/test/SemaCXX/access-base-class.cpp
new file mode 100644
index 0000000..d0b0fb8
--- /dev/null
+++ b/test/SemaCXX/access-base-class.cpp
@@ -0,0 +1,90 @@
+// RUN: %clang_cc1 -fsyntax-only -faccess-control -verify %s
+namespace T1 {
+
+class A { };
+class B : private A { }; // expected-note {{declared private here}}
+
+void f(B* b) {
+ A *a = b; // expected-error{{cannot cast 'class T1::B' to its private base class 'class T1::A'}}
+}
+
+}
+
+namespace T2 {
+
+class A { };
+class B : A { }; // expected-note {{implicitly declared private here}}
+
+void f(B* b) {
+ A *a = b; // expected-error {{cannot cast 'class T2::B' to its private base class 'class T2::A'}}
+}
+
+}
+
+namespace T3 {
+
+class A { };
+class B : public A { };
+
+void f(B* b) {
+ A *a = b;
+}
+
+}
+
+namespace T4 {
+
+class A {};
+
+class B : private virtual A {};
+class C : public virtual A {};
+
+class D : public B, public C {};
+
+void f(D *d) {
+ // This takes the D->C->B->A path.
+ A *a = d;
+}
+
+}
+
+namespace T5 {
+ class A {};
+
+ class B : private A {
+ void f(B *b) {
+ A *a = b;
+ }
+ };
+}
+
+namespace T6 {
+ class C;
+
+ class A {};
+
+ class B : private A { // expected-note {{declared private here}}
+ void f(C* c);
+ };
+
+ class C : public B {
+ void f(C *c) {
+ A* a = c; // expected-error {{cannot cast 'class T6::C' to its private base class 'class T6::A'}}
+ }
+ };
+
+ void B::f(C *c) {
+ A *a = c;
+ }
+}
+
+namespace T7 {
+ class A {};
+ class B : public A {};
+ class C : private B {
+ void f(C *c) {
+ A* a = c; // okay
+ }
+ };
+}
+