[RegisterConfiguration] Streamline access to arch defaults, simplify Registers.

src/compiler/move-optimizer.cc

 // Copyright 2014 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/compiler/move-optimizer.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
@@ skipping 19 matching lines @@
 bool Blocks(const OperandSet& set, const InstructionOperand& operand) {
   if (set.find(operand) != set.end()) return true;
   // Only FP registers alias.
   if (!operand.IsFPRegister()) return false;
 
   const LocationOperand& loc = LocationOperand::cast(operand);
   MachineRepresentation rep = loc.representation();
   MachineRepresentation other_fp_rep = rep == MachineRepresentation::kFloat64
                                            ? MachineRepresentation::kFloat32
                                            : MachineRepresentation::kFloat64;
-  const RegisterConfiguration* config =
-      RegisterConfiguration::ArchDefault(RegisterConfiguration::TURBOFAN);
+  const RegisterConfiguration* config = RegisterConfiguration::Turbofan();
   if (config->fp_aliasing_kind() != RegisterConfiguration::COMBINE) {
     // Overlap aliasing case.
     return set.find(LocationOperand(loc.kind(), loc.location_kind(),
                                     other_fp_rep, loc.register_code())) !=
            set.end();
   }
   // Combine aliasing case.
   int alias_base_index = -1;
   int aliases = config->GetAliases(rep, loc.register_code(), other_fp_rep,
                                    &alias_base_index);
@@ skipping 449 matching lines @@
         static_cast<Instruction::GapPosition>(1), code_zone());
     slot_1->AddMove(group_begin->destination(), load->destination());
     load->Eliminate();
   }
   loads.clear();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8