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

runtime/vm/flow_graph_compiler.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_COMPILER_H_
 #define VM_FLOW_GRAPH_COMPILER_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/code_descriptors.h"
@@ skipping 553 matching lines @@
     return block_order_.length() - index - 1;
   }
 
   void CompactBlock(BlockEntryInstr* block);
   void CompactBlocks();
 
   bool IsListClass(const Class& cls) const {
     return cls.raw() == list_class_.raw();
   }
 
+  void EmitSourceLine(Instruction* instr);
+
   class Assembler* assembler_;
   const ParsedFunction& parsed_function_;
   const FlowGraph& flow_graph_;
   const GrowableArray<BlockEntryInstr*>& block_order_;
 
   // Compiler specific per-block state.  Indexed by postorder block number
   // for convenience.  This is not the block's index in the block order,
   // which is reverse postorder.
   BlockEntryInstr* current_block_;
   ExceptionHandlerList* exception_handlers_list_;
@@ skipping 21 matching lines @@
   // that should be used when deoptimizing we store it in this variable.
   // In future AddDeoptStub should be moved out of the instruction template.
   Environment* pending_deoptimization_env_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_H_