[turbofan] Change number operations to handle Undefined as well.

src/compiler/graph-visualizer.cc

Index: src/compiler/graph-visualizer.cc
diff --git a/src/compiler/graph-visualizer.cc b/src/compiler/graph-visualizer.cc
index 301e3900e1c052fb61f6dd8486d1121721d631ee..0cea77d9facb675571ebb48ec5bb2f47ff21e594 100644
--- a/src/compiler/graph-visualizer.cc
+++ b/src/compiler/graph-visualizer.cc
@@ -640,7 +640,13 @@ std::ostream& operator<<(std::ostream& os, const AsRPO& ar) {
         if (j++ > 0) os << ", ";
         os << "#" << SafeId(i) << ":" << SafeMnemonic(i);
       }
-      os << ")" << std::endl;
+      os << ")";
+      if (NodeProperties::IsTyped(n)) {
+        os << "  [Type: ";
+        NodeProperties::GetType(n)->PrintTo(os);
+        os << "]";
+      }
+      os << std::endl;
     }
   }
   return os;