Enable layout descriptor consistency checks in heap verification mode.

src/objects.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 <sstream>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
@@ skipping 6836 matching lines @@
       unused_property_fields += JSObject::kFieldsAdded;
     }
   }
   result->set_unused_property_fields(unused_property_fields);
 
   if (FLAG_unbox_double_fields) {
     Handle<LayoutDescriptor> layout_descriptor =
         LayoutDescriptor::AppendIfFastOrUseFull(map, details,
                                                 full_layout_descriptor);
     result->set_layout_descriptor(*layout_descriptor);
+#ifdef VERIFY_HEAP
+    // TODO(ishell): remove these checks from VERIFY_HEAP mode.
+    if (FLAG_verify_heap) {
+      CHECK(result->layout_descriptor()->IsConsistentWithMap(*result));
+    }
+#else
     SLOW_DCHECK(result->layout_descriptor()->IsConsistentWithMap(*result));
+#endif
     result->set_visitor_id(StaticVisitorBase::GetVisitorId(*result));
   }
 
   Handle<Name> name = handle(descriptors->GetKey(new_descriptor));
   ConnectTransition(map, result, name, SIMPLE_PROPERTY_TRANSITION);
 
   return result;
 }
 
 
@@ skipping 10140 matching lines @@
                                                CompilationInfo* info) {
   Handle<DependentCode> codes = DependentCode::InsertCompilationInfo(
       handle(cell->dependent_code(), info->isolate()),
       DependentCode::kPropertyCellChangedGroup, info->object_wrapper());
   if (*codes != cell->dependent_code()) cell->set_dependent_code(*codes);
   info->dependencies(DependentCode::kPropertyCellChangedGroup)->Add(
       cell, info->zone());
 }
 
 } }  // namespace v8::internal