Avoid HeapObject check in HStoreNamedField.

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 2381 matching lines @@
     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);
-  }
-  return result;
+  return new(zone()) LStoreNamedField(object, value, temp0, temp1);
 }
 
 
 LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
   LOperand* context = UseFixed(instr->context(), cp);
   LOperand* object = UseFixed(instr->object(), x1);
   LOperand* value = UseFixed(instr->value(), x0);
   LInstruction* result = new(zone()) LStoreNamedGeneric(context, object, value);
   return MarkAsCall(result, instr);
 }
@@ skipping 302 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