Internals: Use runtime type info instead of dynamic_cast for faster graph type checks (#4397)

src/V3GraphAcyc.cpp

@@ -32,6 +32,7 @@ VL_DEFINE_DEBUG_FUNCTIONS;
 //      Break the minimal number of backward edges to make the graph acyclic
 
 class GraphAcycVertex final : public V3GraphVertex {
+    VL_RTTI_IMPL(GraphAcycVertex, V3GraphVertex)
     // user() is used for various sub-algorithm pieces
     V3GraphVertex* const m_origVertexp;  // Pointer to first vertex this represents
 protected:
@@ -56,6 +57,7 @@ public:
 //--------------------------------------------------------------------
 
 class GraphAcycEdge final : public V3GraphEdge {
+    VL_RTTI_IMPL(GraphAcycEdge, V3GraphEdge)
     // userp() is always used to point to the head original graph edge
 private:
     using OrigEdgeList = std::list<V3GraphEdge*>;  // List of orig edges, see also GraphAcyc's decl