Pretenure call new support.

src/ast.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 625 matching lines @@
     if (!lookup->isolate()->heap()->InNewSpace(*candidate)) {
       target_ = candidate;
       return true;
     }
   }
   return false;
 }
 
 
 void CallNew::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
+  int allocation_site_feedback_slot = FLAG_pretenuring_call_new
+      ? AllocationSiteFeedbackSlot()
+      : CallNewFeedbackSlot();
   allocation_site_ =
-      oracle->GetCallNewAllocationSite(CallNewFeedbackSlot());
+      oracle->GetCallNewAllocationSite(allocation_site_feedback_slot);
   is_monomorphic_ = oracle->CallNewIsMonomorphic(CallNewFeedbackSlot());
   if (is_monomorphic_) {
     target_ = oracle->GetCallNewTarget(CallNewFeedbackSlot());
     if (!allocation_site_.is_null()) {
       elements_kind_ = allocation_site_->GetElementsKind();
     }
   }
 }
 
 
@@ skipping 515 matching lines @@
     OS::SNPrintF(buffer, "%d", Smi::cast(*value_)->value());
     str = arr;
   } else {
     str = DoubleToCString(value_->Number(), buffer);
   }
   return isolate_->factory()->NewStringFromAscii(CStrVector(str));
 }
 
 
 } }  // namespace v8::internal