Fix bug in receiver-phi computation.

runtime/vm/flow_graph.h

 // Copyright (c) 2013, 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/bit_vector.h"
 #include "vm/growable_array.h"
 #include "vm/hash_map.h"
@@ skipping 338 matching lines @@
 
   void InsertConversionsFor(Definition* def);
   void ConvertUse(Value* use, Representation from);
   void ConvertEnvironmentUse(Value* use, Representation from);
   void InsertConversion(Representation from,
                         Representation to,
                         Value* use,
                         bool is_environment_use);
 
   bool IsReceiver(Definition* def) const;
-  void ComputeIsReceiverRecursive(PhiInstr* phi, BitVector* processed) const;
+  void ComputeIsReceiver(PhiInstr* phi) const;
+  void ComputeIsReceiverRecursive(PhiInstr* phi,
+                                  GrowableArray<PhiInstr*>* unmark) const;
 
   Thread* thread_;
 
   // DiscoverBlocks computes parent_ and assigned_vars_ which are then used
   // if/when computing SSA.
   GrowableArray<intptr_t> parent_;
   GrowableArray<BitVector*> assigned_vars_;
 
   intptr_t current_ssa_temp_index_;
   intptr_t max_block_id_;
@@ skipping 169 matching lines @@
 
  private:
   GrowableArray<Definition*> defs_;
   BitVector* contains_vector_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_H_