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

src/x87/deoptimizer-x87.cc

 // Copyright 2012 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_X87
 
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/register-configuration.h"
@@ skipping 259 matching lines @@
   // frame descriptor pointer.
   __ mov(ebx, Operand(eax, Deoptimizer::input_offset()));
 
   // Fill in the input registers.
   for (int i = kNumberOfRegisters - 1; i >= 0; i--) {
     int offset = (i * kPointerSize) + FrameDescription::registers_offset();
     __ pop(Operand(ebx, offset));
   }
 
   int double_regs_offset = FrameDescription::double_registers_offset();
-  const RegisterConfiguration* config =
-      RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT);
+  const RegisterConfiguration* config = RegisterConfiguration::Crankshaft();
   // Fill in the double input registers.
   for (int i = 0; i < X87Register::kMaxNumAllocatableRegisters; ++i) {
     int code = config->GetAllocatableDoubleCode(i);
     int dst_offset = code * kDoubleSize + double_regs_offset;
     int src_offset = code * kDoubleSize;
     __ fld_d(Operand(esp, src_offset));
     __ fstp_d(Operand(ebx, dst_offset));
   }
 
   // Clear FPU all exceptions.
@@ skipping 131 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87