Revert of Remove register index/code indirection

src/deoptimizer.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/deoptimizer.h"
 
 #include "src/accessors.h"
 #include "src/codegen.h"
 #include "src/cpu-profiler.h"
 #include "src/disasm.h"
@@ skipping 2054 matching lines @@
 
 
 void Translation::StoreBoolRegister(Register reg) {
   buffer_->Add(BOOL_REGISTER, zone());
   buffer_->Add(reg.code(), zone());
 }
 
 
 void Translation::StoreDoubleRegister(DoubleRegister reg) {
   buffer_->Add(DOUBLE_REGISTER, zone());
-  buffer_->Add(reg.code(), zone());
+  buffer_->Add(DoubleRegister::ToAllocationIndex(reg), zone());
 }
 
 
 void Translation::StoreStackSlot(int index) {
   buffer_->Add(STACK_SLOT, zone());
   buffer_->Add(index, zone());
 }
 
 
 void Translation::StoreInt32StackSlot(int index) {
@@ skipping 832 matching lines @@
       }
       return TranslatedValue::NewBool(this, static_cast<uint32_t>(value));
     }
 
     case Translation::DOUBLE_REGISTER: {
       int input_reg = iterator->Next();
       if (registers == nullptr) return TranslatedValue::NewInvalid(this);
       double value = registers->GetDoubleRegister(input_reg);
       if (trace_file != nullptr) {
         PrintF(trace_file, "%e ; %s (bool)", value,
-               DoubleRegister::from_code(input_reg).ToString());
+               DoubleRegister::AllocationIndexToString(input_reg));
       }
       return TranslatedValue::NewDouble(this, value);
     }
 
     case Translation::STACK_SLOT: {
       int slot_offset =
           OptimizedFrame::StackSlotOffsetRelativeToFp(iterator->Next());
       intptr_t value = *(reinterpret_cast<intptr_t*>(fp + slot_offset));
       if (trace_file != nullptr) {
         PrintF(trace_file, "0x%08" V8PRIxPTR " ; [fp %c %d] ", value,
@@ skipping 473 matching lines @@
       DCHECK(value_info->IsMaterializedObject());
 
       value_info->value_ =
           Handle<Object>(previously_materialized_objects->get(i), isolate_);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8