Revert of Serializer: support all alignment kinds.

src/code-stubs-hydrogen.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.
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
 #include "src/code-stubs.h"
 #include "src/field-index.h"
 #include "src/hydrogen.h"
@@ skipping 623 matching lines @@
   HValue* size = Add<HConstant>(WeakCell::kSize);
   HInstruction* object =
       Add<HAllocate>(size, HType::JSObject(), TENURED, JS_OBJECT_TYPE);
 
   Handle<Map> weak_cell_map = isolate()->factory()->weak_cell_map();
   AddStoreMapConstant(object, weak_cell_map);
 
   HInstruction* value = GetParameter(CreateWeakCellDescriptor::kValueIndex);
   Add<HStoreNamedField>(object, HObjectAccess::ForWeakCellValue(), value);
   Add<HStoreNamedField>(object, HObjectAccess::ForWeakCellNext(),
-                        graph()->GetConstantHole());
+                        graph()->GetConstantUndefined());
 
   HInstruction* feedback_vector =
       GetParameter(CreateWeakCellDescriptor::kVectorIndex);
   HInstruction* slot = GetParameter(CreateWeakCellDescriptor::kSlotIndex);
   Add<HStoreKeyed>(feedback_vector, slot, object, FAST_ELEMENTS,
                    INITIALIZING_STORE);
   return graph()->GetConstant0();
 }
 
 
@@ skipping 1574 matching lines @@
   return Pop();
 }
 
 
 Handle<Code> KeyedLoadGenericStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 }  // namespace internal
 }  // namespace v8