Adding a type vector to replace type cells.

src/objects.cc

 // Copyright 2013 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 10584 matching lines @@
     Code* target(Code::GetCodeFromTargetAddress(info->target_address()));
     if (target->is_inline_cache_stub()) {
       if (kind == NULL || *kind == target->kind()) {
         IC::Clear(this->GetIsolate(), info->pc());
       }
     }
   }
 }
 
 
-void Code::ClearTypeFeedbackCells(Heap* heap) {
+void Code::ClearTypeFeedbackInfo(Heap* heap) {
   if (kind() != FUNCTION) return;
   Object* raw_info = type_feedback_info();
   if (raw_info->IsTypeFeedbackInfo()) {
-    TypeFeedbackCells* type_feedback_cells =
-        TypeFeedbackInfo::cast(raw_info)->type_feedback_cells();
-    for (int i = 0; i < type_feedback_cells->CellCount(); i++) {
-      Cell* cell = type_feedback_cells->GetCell(i);
-      // Don't clear AllocationSites
-      Object* value = cell->value();
-      if (value == NULL || !value->IsAllocationSite()) {
-        cell->set_value(TypeFeedbackCells::RawUninitializedSentinel(heap));
+    FixedArray* feedback_vector =
+        TypeFeedbackInfo::cast(raw_info)->feedback_vector();
+    for (int i = 0; i < feedback_vector->length(); i++) {
+      Object* obj = feedback_vector->get(i);
+      if (!obj->IsAllocationSite()) {
+        // TODO(mvstanton): Can't I avoid a write barrier for this sentinel?
+        feedback_vector->set(i,
+                             TypeFeedbackInfo::RawUninitializedSentinel(heap));
       }
     }
   }
 }
 
 
 BailoutId Code::TranslatePcOffsetToAstId(uint32_t pc_offset) {
   DisallowHeapAllocation no_gc;
   ASSERT(kind() == FUNCTION);
   BackEdgeTable back_edges(this, &no_gc);
@@ skipping 5790 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal