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

src/mips64/deoptimizer-mips64.cc

 // Copyright 2011 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/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/register-configuration.h"
 #include "src/safepoint-table.h"
 
@@ skipping 99 matching lines @@
   // For the rest, there are gaps on the stack, so the offsets remain the same.
   const int kNumberOfRegisters = Register::kNumRegisters;
 
   RegList restored_regs = kJSCallerSaved | kCalleeSaved;
   RegList saved_regs = restored_regs | sp.bit() | ra.bit();
 
   const int kDoubleRegsSize = kDoubleSize * DoubleRegister::kMaxNumRegisters;
 
   // Save all FPU registers before messing with them.
   __ Dsubu(sp, sp, Operand(kDoubleRegsSize));
-  const RegisterConfiguration* config =
-      RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT);
+  const RegisterConfiguration* config = RegisterConfiguration::Crankshaft();
   for (int i = 0; i < config->num_allocatable_double_registers(); ++i) {
     int code = config->GetAllocatableDoubleCode(i);
     const DoubleRegister fpu_reg = DoubleRegister::from_code(code);
     int offset = code * kDoubleSize;
     __ sdc1(fpu_reg, MemOperand(sp, offset));
   }
 
   // Push saved_regs (needed to populate FrameDescription::registers_).
   // Leave gaps for other registers.
   __ Dsubu(sp, sp, kNumberOfRegisters * kPointerSize);
@@ skipping 250 matching lines @@
   // No embedded constant pool support.
   UNREACHABLE();
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8