On 9 January 2015 at 20:10, Enes Goktas wrote: > During compilation when we have the tree object of class E, could we > tell that its first two vtables originate from class C and third one > from class D? If I understand your question correctly, you should probably ask on the 'gcc' list instead of 'gcc-help', because the answer requires knowledge of GCC internals and how the C++ front-end works.