Allocation Info Tracking, continued.

src/type-info.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 292 matching lines @@
     return Handle<JSFunction>::cast(info);
   }
 }
 
 
 ElementsKind TypeFeedbackOracle::GetCallNewElementsKind(CallNew* expr) {
   Handle<Object> info = GetInfo(expr->CallNewFeedbackId());
   if (info->IsSmi()) {
     return static_cast<ElementsKind>(Smi::cast(*info)->value());
   } else {
-    return GetInitialFastElementsKind();
+    // TODO(mvstanton): avoided calling GetInitialFastElementsKind() for perf
+    // reasons. Is there a better fix?
+    if (FLAG_packed_arrays) {
+      return FAST_SMI_ELEMENTS;
+    } else {
+      return FAST_HOLEY_SMI_ELEMENTS;
+    }
   }
 }
 
 Handle<Map> TypeFeedbackOracle::GetObjectLiteralStoreMap(
     ObjectLiteral::Property* prop) {
   ASSERT(ObjectLiteralStoreIsMonomorphic(prop));
   return Handle<Map>::cast(GetInfo(prop->key()->LiteralFeedbackId()));
 }
 
 
@@ skipping 410 matching lines @@
   USE(maybe_result);
 #ifdef DEBUG
   Object* result = NULL;
   // Dictionary has been allocated with sufficient size for all elements.
   ASSERT(maybe_result->ToObject(&result));
   ASSERT(*dictionary_ == result);
 #endif
 }
 
 } }  // namespace v8::internal