Revert of Reland: Remove register index/code indirection

src/arm64/deoptimizer-arm64.cc

Index: src/arm64/deoptimizer-arm64.cc
diff --git a/src/arm64/deoptimizer-arm64.cc b/src/arm64/deoptimizer-arm64.cc
index 60409f6d267e0268e039ef62f9813979227c4081..65fb93e53cfa2e87d555e3a937d6f5ffc8b99761 100644
--- a/src/arm64/deoptimizer-arm64.cc
+++ b/src/arm64/deoptimizer-arm64.cc
@@ -6,7 +6,6 @@
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
-#include "src/register-configuration.h"
 #include "src/safepoint-table.h"
 
 
@@ -76,7 +75,7 @@
   input_->SetRegister(jssp.code(), reinterpret_cast<intptr_t>(frame->sp()));
   input_->SetRegister(fp.code(), reinterpret_cast<intptr_t>(frame->fp()));
 
-  for (int i = 0; i < DoubleRegister::kMaxNumRegisters; i++) {
+  for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); i++) {
     input_->SetDoubleRegister(i, 0.0);
   }
 
@@ -123,9 +122,8 @@
   // in the input frame.
 
   // Save all allocatable floating point registers.
-  CPURegList saved_fp_registers(
-      CPURegister::kFPRegister, kDRegSizeInBits,
-      RegisterConfiguration::ArchDefault()->allocatable_double_codes_mask());
+  CPURegList saved_fp_registers(CPURegister::kFPRegister, kDRegSizeInBits,
+                                FPRegister::kAllocatableFPRegisters);
   __ PushCPURegList(saved_fp_registers);
 
   // We save all the registers expcept jssp, sp and lr.