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

runtime/vm/flow_graph_optimizer.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_FLOW_GRAPH_OPTIMIZER_H_
 #define VM_FLOW_GRAPH_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
@@ skipping 164 matching lines @@
   // check fails it will deoptimize to 'deopt_id' using the deoptimization
   // environment 'deopt_environment'.  The check is inserted immediately
   // before 'insert_before'.
   void AddCheckClass(Definition* to_check,
                      const ICData& unary_checks,
                      intptr_t deopt_id,
                      Environment* deopt_environment,
                      Instruction* insert_before);
   Instruction* GetCheckClass(Definition* to_check,
                              const ICData& unary_checks,
-                             intptr_t deopt_id);
+                             intptr_t deopt_id,
+                             intptr_t token_pos);
 
   // Insert a Smi check if needed.
   void AddCheckSmi(Definition* to_check,
                    intptr_t deopt_id,
                    Environment* deopt_environment,
                    Instruction* insert_before);
 
   // Add a class check for a call's first argument immediately before the
   // call, using the call's IC data to determine the check, and the call's
   // deopt ID and deoptimization environment if the check fails.
@@ skipping 223 matching lines @@
 // Optimize spill stores inside try-blocks by identifying values that always
 // contain a single known constant at catch block entry.
 class TryCatchAnalyzer : public AllStatic {
  public:
   static void Optimize(FlowGraph* flow_graph);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_OPTIMIZER_H_