Set previous pointer to graph entry for initial definitions.

runtime/vm/flow_graph.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_H_
 #define VM_FLOW_GRAPH_H_
 
 #include "vm/growable_array.h"
 #include "vm/parser.h"
 
@@ skipping 88 matching lines @@
   }
 
   ZoneGrowableArray<ReturnInstr*>* exits() const { return exits_; }
   void set_exits(ZoneGrowableArray<ReturnInstr*>* exits) { exits_ = exits; }
 
   intptr_t alloc_ssa_temp_index() { return current_ssa_temp_index_++; }
 
   intptr_t InstructionCount() const;
 
   ConstantInstr* AddConstantToInitialDefinitions(const Object& object);
+  void AddToInitialDefinitions(Definition* defn);
 
   // Operations on the flow graph.
   void ComputeSSA(intptr_t next_virtual_register_number,
                   GrowableArray<Definition*>* inlining_parameters);
   void ComputeUseLists();
 
   // Finds natural loops in the flow graph and attaches a list of loop
   // body blocks for each loop header.
   void ComputeLoops(GrowableArray<BlockEntryInstr*>* loop_headers);
 
@@ skipping 57 matching lines @@
   GrowableArray<BlockEntryInstr*> preorder_;
   GrowableArray<BlockEntryInstr*> postorder_;
   GrowableArray<BlockEntryInstr*> reverse_postorder_;
   ZoneGrowableArray<ReturnInstr*>* exits_;
   bool invalid_dominator_tree_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_H_