More efficient use of space in AllocationSite.

src/code-stubs-hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 473 matching lines @@
                         HObjectAccess::ForAllocationSiteOffset(
                             AllocationSite::kTransitionInfoOffset),
                         initial_elements_kind);
 
   // Unlike literals, constructed arrays don't have nested sites
   Add<HStoreNamedField>(object,
                         HObjectAccess::ForAllocationSiteOffset(
                             AllocationSite::kNestedSiteOffset),
                         graph()->GetConstant0());
 
-  // Pretenuring calculation fields.
+  // Pretenuring calculation field.
   Add<HStoreNamedField>(object,
                         HObjectAccess::ForAllocationSiteOffset(
-                            AllocationSite::kMementoFoundCountOffset),
+                            AllocationSite::kPretenureDataOffset),
                         graph()->GetConstant0());
 
+  // Pretenuring memento creation count field.
   Add<HStoreNamedField>(object,
                         HObjectAccess::ForAllocationSiteOffset(
-                            AllocationSite::kMementoCreateCountOffset),
-                        graph()->GetConstant0());
-
-  Add<HStoreNamedField>(object,
-                        HObjectAccess::ForAllocationSiteOffset(
-                            AllocationSite::kPretenureDecisionOffset),
+                            AllocationSite::kPretenureCreateCountOffset),
                         graph()->GetConstant0());
 
   // Store an empty fixed array for the code dependency.
   HConstant* empty_fixed_array =
     Add<HConstant>(isolate()->factory()->empty_fixed_array());
   HStoreNamedField* store = Add<HStoreNamedField>(
       object,
       HObjectAccess::ForAllocationSiteOffset(
           AllocationSite::kDependentCodeOffset),
       empty_fixed_array);
@@ skipping 828 matching lines @@
   return BuildUncheckedDictionaryElementLoad(receiver, key);
 }
 
 
 Handle<Code> KeyedLoadDictionaryElementStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 
 } }  // namespace v8::internal