Add tests from the Itanium C++ ABI spec.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96586 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGenCXX/vtable-layout-abi-examples.cpp

@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm-only -fdump-vtable-layouts 2>&1 | FileCheck %s
+
+/// Examples from the Itanium C++ ABI specification.
+/// http://www.codesourcery.com/public/cxx-abi/
+
+namespace Test1 {
+
+// This is from http://www.codesourcery.com/public/cxx-abi/cxx-vtable-ex.html
+
+// CHECK:      Vtable for 'Test1::A' (5 entries).
+// CHECK-NEXT:    0 | offset_to_top (0)
+// CHECK-NEXT:    1 | Test1::A RTTI
+// CHECK-NEXT:        -- (Test1::A, 0) vtable address --
+// CHECK-NEXT:    2 | void Test1::A::f()
+// CHECK-NEXT:    3 | void Test1::A::g()
+// CHECK-NEXT:    4 | void Test1::A::h()
+struct A {
+  virtual void f ();
+  virtual void g ();
+  virtual void h ();
+  int ia;
+};
+void A::f() {}
+
+}