Remove (H|L)JSArrayLength instructions

src/code-stubs-hydrogen.cc

 // 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 255 matching lines @@
   Zone* zone = this->zone();
 
   HValue* js_array = GetParameter(0);
   HValue* map = GetParameter(1);
 
   info()->MarkAsSavesCallerDoubles();
 
   AddInstruction(new(zone) HTrapAllocationMemento(js_array));
 
   HInstruction* array_length =
-      AddInstruction(new(zone) HJSArrayLength(js_array,
-                                              js_array,
-                                              HType::Smi()));
+      AddInstruction(HLoadNamedField::NewArrayLength(zone, js_array));
 
   ElementsKind to_kind = casted_stub()->to_kind();
   BuildNewSpaceArrayCheck(array_length, to_kind);
 
   IfBuilder if_builder(this);
 
   if_builder.BeginIf(array_length, graph()->GetConstant0(), Token::EQ);
 
   // Nothing to do, just change the map.
 
@@ skipping 70 matching lines @@
   current_block()->MarkAsDeoptimizing();
   return GetParameter(0);
 }
 
 
 Handle<Code> ArrayNArgumentsConstructorStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 } }  // namespace v8::internal