Implement simple spill store elimination.

runtime/vm/locations.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_LOCATIONS_H_
 #define VM_LOCATIONS_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/bitfield.h"
@@ skipping 153 matching lines @@
   }
 
   intptr_t stack_index() const {
     ASSERT(IsStackSlot());
     // Decode stack index manually to preserve sign.
     return payload() - kStackIndexBias;
   }
 
   const char* Name() const;
   void PrintTo(BufferFormatter* f) const;
+  void Print() const;
 
   // Compare two locations.
   bool Equals(Location other) const {
     return value_ == other.value_;
   }
 
  private:
   explicit Location(uword value) : value_(value) { }
 
   Location(Kind kind, uword payload)
@@ skipping 98 matching lines @@
   GrowableArray<Location> temp_locations_;
   Location output_location_;
 
   const bool is_call_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_LOCATIONS_H_