Allocation Info Tracking, continued.

src/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 8461 matching lines @@
         new(zone()) HCallNew(context, function, argument_count));
     call->set_position(expr->position());
     return ast_context()->ReturnInstruction(call, expr->id());
   } else {
     // The constructor function is both an operand to the instruction and an
     // argument to the construct call.
     CHECK_ALIVE(VisitArgument(expr->expression()));
     HValue* constructor = HPushArgument::cast(Top())->argument();
     CHECK_ALIVE(VisitArgumentList(expr->arguments()));
     HCallNew* call;
-    if (!(expr->target().is_null()) &&
+    if (FLAG_optimize_constructed_arrays &&
+        !(expr->target().is_null()) &&
         *(expr->target()) == isolate()->global_context()->array_function()) {
       Handle<Object> feedback = oracle()->GetInfo(expr->CallNewFeedbackId());
       ASSERT(feedback->IsSmi());
       Handle<JSGlobalPropertyCell> cell =
           isolate()->factory()->NewJSGlobalPropertyCell(feedback);
       AddInstruction(new(zone()) HCheckFunction(constructor,
           Handle<JSFunction>(isolate()->global_context()->array_function())));
       call = new(zone()) HCallNewArray(context, constructor, argument_count,
                                        cell);
     } else {
@@ skipping 2313 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal