Allow direct allocation in old pointer space.

src/code-stubs-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 143 matching lines @@
   int size = JSObject::kHeaderSize + casted_stub()->length() * kPointerSize;
   HValue* boilerplate_size =
       AddInstruction(new(zone) HInstanceSize(boilerplate));
   HValue* size_in_words =
       AddInstruction(new(zone) HConstant(size >> kPointerSizeLog2,
                                          Representation::Integer32()));
   builder.CheckIntegerEq(boilerplate_size, size_in_words);
 
   HValue* size_in_bytes =
       AddInstruction(new(zone) HConstant(size, Representation::Integer32()));
+  HAllocate::Flags flags = HAllocate::CAN_ALLOCATE_IN_NEW_SPACE;
+  if (FLAG_pretenure_objects) {
+    flags = static_cast<HAllocate::Flags>(
+       flags | HAllocate::CAN_ALLOCATE_IN_OLD_POINTER_SPACE);
+  }
   HInstruction* object =
       AddInstruction(new(zone) HAllocate(context(),

[Michael Starzinger, 2013/03/07 19:19:38]

Either keep the old line-breaks or also move the context() onto the next line.

[Hannes Payer (out of office), 2013/03/11 17:16:32]

Done.

-                                         size_in_bytes,
-                                         HType::JSObject(),
-                                         HAllocate::CAN_ALLOCATE_IN_NEW_SPACE));
+          size_in_bytes, HType::JSObject(), flags));
 
   for (int i = 0; i < size; i += kPointerSize) {
     HInstruction* value =
         AddInstruction(new(zone) HLoadNamedField(boilerplate, true, i));
     AddInstruction(new(zone) HStoreNamedField(object,
                                               factory->empty_string(),
                                               value,
                                               true, i));
     AddSimulate(BailoutId::StubEntry());
   }
@@ skipping 128 matching lines @@
 
 
 Handle<Code> TransitionElementsKindStub::GenerateCode() {
   CodeStubGraphBuilder<TransitionElementsKindStub> builder(this);
   LChunk* chunk = OptimizeGraph(builder.CreateGraph());
   return chunk->Codegen(Code::COMPILED_STUB);
 }
 
 
 } }  // namespace v8::internal