3 files changed, 140 insertions, 0 deletions
diff --git a/clang/test/CXX/class.derived/class.abstract/p4.cpp b/clang/test/CXX/class.derived/class.abstract/p4.cpp
new file mode 100644
index 00000000000..ca99bf7f165
--- /dev/null
+++ b/clang/test/CXX/class.derived/class.abstract/p4.cpp
@@ -0,0 +1,80 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+namespace PR6631 {
+  struct A { 
+    virtual void f() = 0;
+  };
+
+  struct B : virtual A { };
+
+  struct C : virtual A { 
+    virtual void f();
+  };
+
+  struct D : public B, public C { 
+    virtual void f();
+  };
+
+  void f() {
+    (void)new D; // okay
+  }
+}
+
+// Check cases where we have a virtual function that is pure in one
+// subobject but not pure in another subobject.
+namespace PartlyPure {
+  struct A { 
+    virtual void f() = 0; // expected-note{{pure virtual function}}
+  };
+
+  struct B : A {
+    virtual void f();
+  };
+
+  struct C : virtual A { };
+
+  struct D : B, C { };
+
+  void f() {
+    (void) new D; // expected-error{{abstract type}}
+  }
+}
+
+namespace NonPureAlongOnePath {
+  struct A { 
+    virtual void f() = 0;
+  };
+
+  struct B : virtual A {
+    virtual void f();
+  };
+
+  struct C : virtual A { };
+
+  struct D : B, C { };
+
+  void f() {
+    (void) new D; // okay
+  }  
+}
+
+namespace NonPureAlongOnePath2 {
+  struct Aprime { 
+    virtual void f() = 0;
+  };
+
+  struct A : Aprime {
+  };
+
+  struct B : virtual A {
+    virtual void f();
+  };
+
+  struct C : virtual A { };
+
+  struct D : B, C { };
+
+  void f() {
+    (void) new D; // okay
+  }  
+}
diff --git a/clang/test/CXX/class.derived/class.abstract/p5.cpp b/clang/test/CXX/class.derived/class.abstract/p5.cpp
new file mode 100644
index 00000000000..207519d17e4
--- /dev/null
+++ b/clang/test/CXX/class.derived/class.abstract/p5.cpp
@@ -0,0 +1,23 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+struct A {
+  virtual void f() = 0; // expected-note{{pure virtual function}}
+};
+
+struct B : A {
+  virtual void f();
+};
+
+struct C : B {
+  virtual void f() = 0; // expected-note 2{{pure virtual function}}
+};
+
+struct D : C {
+};
+
+void test() {
+  (void)new A; // expected-error{{object of abstract type}}
+  (void)new B;
+  (void)new C; // expected-error{{object of abstract type}}
+  (void)new D; // expected-error{{object of abstract type}}
+}
diff --git a/clang/test/CXX/class.derived/class.virtual/p2.cpp b/clang/test/CXX/class.derived/class.virtual/p2.cpp
new file mode 100644
index 00000000000..64d93c88365
--- /dev/null
+++ b/clang/test/CXX/class.derived/class.virtual/p2.cpp
@@ -0,0 +1,37 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+struct A {
+  virtual void f() = 0; // expected-note 2{{overridden virtual function}}
+};
+
+struct Aprime : virtual A {
+  virtual void f();
+};
+
+struct B : Aprime {
+  virtual void f(); // expected-note 3{{final overrider of 'A::f'}}
+};
+
+struct C : virtual A {
+  virtual void f(); // expected-note{{final overrider of 'A::f'}}
+};
+
+struct D : B, C { }; // expected-error{{virtual function 'A::f' has more than one final overrider in 'D'}}
+
+struct B2 : B { };
+
+struct E : B, B2 { }; //expected-error{{virtual function 'A::f' has more than one final overrider in 'E'}}
+
+struct F : B, B2 {
+  virtual void f(); // okay
+};
+
+struct G : F { }; // okay
+
+struct H : G, A { }; // okay
+
+namespace MultipleSubobjects {
+  struct A { virtual void f(); };
+  struct B : A { virtual void f(); };
+  struct C : A { virtual void f(); };
+  struct D : B, C { }; // okay
+}