Generalize HeapObject alignment requirements.

src/snapshot/serialize.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/accessors.h"
 #include "src/api.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 1711 matching lines @@
                "NewLargeObject");
     sink_->PutInt(size >> kObjectAlignmentBits, "ObjectSizeInWords");
     if (object_->IsCode()) {
       sink_->Put(EXECUTABLE, "executable large object");
     } else {
       sink_->Put(NOT_EXECUTABLE, "not executable large object");
     }
     back_reference = serializer_->AllocateLargeObject(size);
   } else {
     bool needs_double_align = false;
-    if (object_->NeedsToEnsureDoubleAlignment()) {
+    // TODO(bbudge): Generalize to other alignment constraints.
+    if (object_->RequiredAlignment() == kDoubleAligned) {
       // Add wriggle room for double alignment padding.
       back_reference = serializer_->Allocate(space, size + kPointerSize);
       needs_double_align = true;
     } else {
       back_reference = serializer_->Allocate(space, size);
     }
     sink_->Put(kNewObject + reference_representation_ + space, "NewObject");
     if (needs_double_align)
       sink_->PutInt(kDoubleAlignmentSentinel, "DoubleAlignSentinel");
     int encoded_size = size >> kObjectAlignmentBits;
@@ skipping 943 matching lines @@
   DisallowHeapAllocation no_gc;
   SerializedCodeData* scd = new SerializedCodeData(cached_data);
   SanityCheckResult r = scd->SanityCheck(isolate, source);
   if (r == CHECK_SUCCESS) return scd;
   cached_data->Reject();
   source->GetIsolate()->counters()->code_cache_reject_reason()->AddSample(r);
   delete scd;
   return NULL;
 }
 } }  // namespace v8::internal