Generate the TransitionElementsStub using Crankshaft

src/lithium-allocator.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 427 matching lines @@
     // There can be only one.
     ASSERT(!has_osr_entry_);
     // Simply set a flag to find and process instruction later.
     has_osr_entry_ = true;
   }
 
 #ifdef DEBUG
   void Verify() const;
 #endif
 
+  BitVector* assigned_registers() {
+    return assigned_registers_;
+  }
+  BitVector* assigned_double_registers() {
+    return assigned_double_registers_;
+  }
+
  private:
   void MeetRegisterConstraints();
   void ResolvePhis();
   void BuildLiveRanges();
   void AllocateGeneralRegisters();
   void AllocateDoubleRegisters();
   void ConnectRanges();
   void ResolveControlFlow();
   void PopulatePointerMaps();
   void ProcessOsrEntry();
@@ skipping 72 matching lines @@
   void SplitAndSpillIntersecting(LiveRange* range);
 
   void Spill(LiveRange* range);
   bool IsBlockBoundary(LifetimePosition pos);
 
   // Helper methods for resolving control flow.
   void ResolveControlFlow(LiveRange* range,
                           HBasicBlock* block,
                           HBasicBlock* pred);
 
+  inline void SetLiveRangeAssignedRegister(LiveRange* range,
+                                           int reg,
+                                           RegisterKind register_kind,
+                                           Zone* zone);
+
   // Return parallel move that should be used to connect ranges split at the
   // given position.
   LParallelMove* GetConnectingParallelMove(LifetimePosition pos);
 
   // Return the block which contains give lifetime position.
   HBasicBlock* GetBlock(LifetimePosition pos);
 
   // Helper methods for the fixed registers.
   int RegisterCount() const;
   static int FixedLiveRangeID(int index) { return -index - 1; }
@@ skipping 34 matching lines @@
   ZoneList<LiveRange*> reusable_slots_;
 
   // Next virtual register number to be assigned to temporaries.
   int next_virtual_register_;
   int first_artificial_register_;
   GrowableBitVector double_artificial_registers_;
 
   RegisterKind mode_;
   int num_registers_;
 
+  BitVector* assigned_registers_;
+  BitVector* assigned_double_registers_;
+
   HGraph* graph_;
 
   bool has_osr_entry_;
 
   // Indicates success or failure during register allocation.
   bool allocation_ok_;
 
   DISALLOW_COPY_AND_ASSIGN(LAllocator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LITHIUM_ALLOCATOR_H_