Add flag —source-lines which emits appropriate source lines as code comments. Added token_pos to …

runtime/vm/flow_graph_type_propagator.cc

Index: runtime/vm/flow_graph_type_propagator.cc
===================================================================
--- runtime/vm/flow_graph_type_propagator.cc	(revision 35591)
+++ runtime/vm/flow_graph_type_propagator.cc	(working copy)
@@ -373,13 +373,15 @@
   if (check->IsCheckSmi()) {
     check_clone =
         new CheckSmiInstr(assert->value()->Copy(),
-                          assert->env()->deopt_id());
+                          assert->env()->deopt_id(),
+                          check->token_pos());
   } else {
     ASSERT(check->IsCheckClass());
     check_clone =
         new CheckClassInstr(assert->value()->Copy(),
                             assert->env()->deopt_id(),
-                            check->AsCheckClass()->unary_checks());
+                            check->AsCheckClass()->unary_checks(),
+                            check->token_pos());
   }
   ASSERT(check_clone != NULL);
   ASSERT(assert->deopt_id() == assert->env()->deopt_id());