Correctly initialize the PrimaryBaseInfo if a base is null. Fixes PR5832.

llvm-svn: 91748

clang/include/clang/AST/RecordLayout.h

@@ -53,7 +53,7 @@ public:
     PrimaryBaseInfo() {}
 
     PrimaryBaseInfo(const CXXRecordDecl *Base, bool IsVirtual)
-      : Value(Base, IsVirtual) {}
+      : Value(Base, Base && IsVirtual) {}
 
     /// Value - Points to the primary base. The single-bit value
     /// will be non-zero when the primary base is virtual.

clang/test/CodeGenCXX/virtual-function-calls.cpp

@@ -9,3 +9,11 @@ void f(A *a) {
   // CHECK: call void %
   a->f('c');
 }
+
+struct B : virtual A { 
+  virtual void f();
+};
+
+void f(B * b) {
+  b->f();
+}