Revert of Remove register index/code indirection

src/x64/lithium-codegen-x64.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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/cpu-profiler.h"
@@ skipping 71 matching lines @@
 
 void LCodeGen::SaveCallerDoubles() {
   DCHECK(info()->saves_caller_doubles());
   DCHECK(NeedsEagerFrame());
   Comment(";;; Save clobbered callee double registers");
   int count = 0;
   BitVector* doubles = chunk()->allocated_double_registers();
   BitVector::Iterator save_iterator(doubles);
   while (!save_iterator.Done()) {
     __ movsd(MemOperand(rsp, count * kDoubleSize),
-             XMMRegister::from_code(save_iterator.Current()));
+             XMMRegister::FromAllocationIndex(save_iterator.Current()));
     save_iterator.Advance();
     count++;
   }
 }
 
 
 void LCodeGen::RestoreCallerDoubles() {
   DCHECK(info()->saves_caller_doubles());
   DCHECK(NeedsEagerFrame());
   Comment(";;; Restore clobbered callee double registers");
   BitVector* doubles = chunk()->allocated_double_registers();
   BitVector::Iterator save_iterator(doubles);
   int count = 0;
   while (!save_iterator.Done()) {
-    __ movsd(XMMRegister::from_code(save_iterator.Current()),
+    __ movsd(XMMRegister::FromAllocationIndex(save_iterator.Current()),
              MemOperand(rsp, count * kDoubleSize));
     save_iterator.Advance();
     count++;
   }
 }
 
 
 bool LCodeGen::GeneratePrologue() {
   DCHECK(is_generating());
 
@@ skipping 312 matching lines @@
 
 
 bool LCodeGen::GenerateSafepointTable() {
   DCHECK(is_done());
   safepoints_.Emit(masm(), GetStackSlotCount());
   return !is_aborted();
 }
 
 
 Register LCodeGen::ToRegister(int index) const {
-  return Register::from_code(index);
+  return Register::FromAllocationIndex(index);
 }
 
 
 XMMRegister LCodeGen::ToDoubleRegister(int index) const {
-  return XMMRegister::from_code(index);
+  return XMMRegister::FromAllocationIndex(index);
 }
 
 
 Register LCodeGen::ToRegister(LOperand* op) const {
   DCHECK(op->IsRegister());
   return ToRegister(op->index());
 }
 
 
 XMMRegister LCodeGen::ToDoubleRegister(LOperand* op) const {
@@ skipping 5458 matching lines @@
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64