Small simplification of HChange instruction.

src/hydrogen.cc

 // Copyright 2011 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 1842 matching lines @@
       use_value->CheckFlag(HValue::kDeoptimizeOnUndefined);
   if (value->IsConstant()) {
     HConstant* constant = HConstant::cast(value);
     // Try to create a new copy of the constant with the new representation.
     new_value = is_truncating
         ? constant->CopyToTruncatedInt32()
         : constant->CopyToRepresentation(to);
   }
 
   if (new_value == NULL) {
-    new_value = new(zone()) HChange(value, value->representation(), to,
+    new_value = new(zone()) HChange(value, to,
                                     is_truncating, deoptimize_on_undefined);
   }
 
   new_value->InsertBefore(next);
   use_value->SetOperandAt(use_index, new_value);
 }
 
 
 void HGraph::InsertRepresentationChangesForValue(HValue* value) {
   Representation r = value->representation();
@@ skipping 5068 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal