Jz sparse

@jz10 
// ??? There is code for p = &q. However, how does this code handle more complex uses of SgAddressOf
// ??? such as (&q)[0]? It seems like you'd need to have code in this visitor function to add (&q) --pointsto-> q
// ??? to the object map and the reverse for visit(SgPointerDerefExpr)