Add VTT parameter to base ctors/dtors with virtual bases. (They aren't used yet).

llvm-svn: 89835
diff --git a/clang/test/CodeGenCXX/virtual-bases.cpp b/clang/test/CodeGenCXX/virtual-bases.cpp
new file mode 100644
index 0000000..4b069ea
--- /dev/null
+++ b/clang/test/CodeGenCXX/virtual-bases.cpp
@@ -0,0 +1,17 @@
+// RUN: clang-cc -emit-llvm %s -o - -triple=x86_64-apple-darwin10 | FileCheck %s
+
+struct A { 
+  A();
+};
+
+// CHECK: define void @_ZN1AC1Ev(%struct.A* %this)
+// CHECK: define void @_ZN1AC2Ev(%struct.A* %this)
+A::A() { }
+
+struct B : virtual A { 
+  B();
+};
+
+// CHECK: define void @_ZN1BC1Ev(%struct.B* %this)
+// CHECK: define void @_ZN1BC2Ev(%struct.B* %this, i8** %vtt)
+B::B() { }