Revert "Refactor transitioning stores."

src/arm64/lithium-arm64.cc

 // Copyright 2013 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 "v8.h"
 
 #include "lithium-allocator-inl.h"
 #include "arm64/lithium-arm64.h"
 #include "arm64/lithium-codegen-arm64.h"
 #include "hydrogen-osr.h"
@@ skipping 2353 matching lines @@
   LOperand* temp0 = NULL;
   LOperand* temp1 = NULL;
 
   if (instr->access().IsExternalMemory() ||
       instr->field_representation().IsDouble()) {
     value = UseRegister(instr->value());
   } else if (instr->NeedsWriteBarrier()) {
     value = UseRegisterAndClobber(instr->value());
     temp0 = TempRegister();
     temp1 = TempRegister();
+  } else if (instr->NeedsWriteBarrierForMap()) {
+    value = UseRegister(instr->value());
+    temp0 = TempRegister();
+    temp1 = TempRegister();
   } else {
     value = UseRegister(instr->value());
     temp0 = TempRegister();
   }
 
   LStoreNamedField* result =
       new(zone()) LStoreNamedField(object, value, temp0, temp1);
   if (instr->field_representation().IsHeapObject() &&
       !instr->value()->type().IsHeapObject()) {
     return AssignEnvironment(result);
@@ skipping 314 matching lines @@
 
 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   LOperand* receiver = UseRegister(instr->receiver());
   LOperand* function = UseRegister(instr->function());
   LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 
 } }  // namespace v8::internal