provides a mechanism for optimizing compilers to select the different Register configuration.

src/ppc/deoptimizer-ppc.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/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
 #include "src/register-configuration.h"
 #include "src/safepoint-table.h"
 
@@ skipping 137 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();
 
   const int kDoubleRegsSize = kDoubleSize * DoubleRegister::kNumRegisters;
 
   // Save all double registers before messing with them.
   __ subi(sp, sp, Operand(kDoubleRegsSize));
-  const RegisterConfiguration* config = RegisterConfiguration::ArchDefault();
+  const RegisterConfiguration* config =
+      RegisterConfiguration::ArchDefault(RegisterConfiguration::CRANKSHAFT);
   for (int i = 0; i < config->num_allocatable_double_registers(); ++i) {
     int code = config->GetAllocatableDoubleCode(i);
     const DoubleRegister dreg = DoubleRegister::from_code(code);
     int offset = code * kDoubleSize;
     __ stfd(dreg, MemOperand(sp, offset));
   }
 
   // Push saved_regs (needed to populate FrameDescription::registers_).
   // Leave gaps for other registers.
   __ subi(sp, sp, Operand(kNumberOfRegisters * kPointerSize));
@@ skipping 190 matching lines @@
 
 void FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) {
   DCHECK(FLAG_enable_embedded_constant_pool);
   SetFrameSlot(offset, value);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8