Insert allocation memento clear instructions after the dominating allocate instruction.

src/hydrogen-instructions.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 3305 matching lines @@
       Representation::None(),
       dominator_allocate);
   dominator_allocate->UpdateSize(new_dominator_size_constant);
 
 #ifdef VERIFY_HEAP
   if (FLAG_verify_heap && dominator_allocate->IsNewSpaceAllocation()) {
     dominator_allocate->MakePrefillWithFiller();
   } else {
     // TODO(hpayer): This is a short-term hack to make allocation mementos
     // work again in new space.
-    ClearNextMapWord(original_object_size);
+    dominator_allocate->ClearNextMapWord(original_object_size);
   }
 #else
   // TODO(hpayer): This is a short-term hack to make allocation mementos
   // work again in new space.
-  ClearNextMapWord(original_object_size);
+  dominator_allocate->ClearNextMapWord(original_object_size);
 #endif
 
   dominator_allocate->clear_next_map_word_ = clear_next_map_word_;
 
   // After that replace the dominated allocate instruction.
   HInstruction* dominated_allocate_instr =
       HInnerAllocatedObject::New(zone,
                                  context(),
                                  dominator_allocate,
                                  dominator_size_constant,
@@ skipping 882 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal