Revert of Remove register index/code indirection

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 12144 matching lines @@
 
         case Translation::BOOL_REGISTER: {
           int reg_code = iterator.Next();
           os << "{input=" << converter.NameOfCPURegister(reg_code)
              << " (bool)}";
           break;
         }
 
         case Translation::DOUBLE_REGISTER: {
           int reg_code = iterator.Next();
-          os << "{input=" << DoubleRegister::from_code(reg_code).ToString()
+          os << "{input=" << DoubleRegister::AllocationIndexToString(reg_code)
              << "}";
           break;
         }
 
         case Translation::STACK_SLOT: {
           int input_slot_index = iterator.Next();
           os << "{input=" << input_slot_index << "}";
           break;
         }
 
@@ skipping 4593 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8