Share optimized code for closures.

src/heap.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 2984 matching lines @@
 
 MaybeObject* Heap::AllocateSharedFunctionInfo(Object* name) {
   SharedFunctionInfo* share;
   MaybeObject* maybe = Allocate(shared_function_info_map(), OLD_POINTER_SPACE);
   if (!maybe->To<SharedFunctionInfo>(&share)) return maybe;
 
   // Set pointer fields.
   share->set_name(name);
   Code* illegal = isolate_->builtins()->builtin(Builtins::kIllegal);
   share->set_code(illegal);
+  share->set_optimized_code_map(Smi::FromInt(0));

[Michael Starzinger, 2012/05/23 11:16:29]

Would it be possible to set this to the empty fixed array instead and remove
some of the special casing in the search and add-to function.

   share->set_scope_info(ScopeInfo::Empty());
   Code* construct_stub =
       isolate_->builtins()->builtin(Builtins::kJSConstructStubGeneric);
   share->set_construct_stub(construct_stub);
   share->set_instance_class_name(Object_symbol());
   share->set_function_data(undefined_value(), SKIP_WRITE_BARRIER);
   share->set_script(undefined_value(), SKIP_WRITE_BARRIER);
   share->set_debug_info(undefined_value(), SKIP_WRITE_BARRIER);
   share->set_inferred_name(empty_string(), SKIP_WRITE_BARRIER);
   share->set_initial_map(undefined_value(), SKIP_WRITE_BARRIER);
@@ skipping 4114 matching lines @@
   } else {
     p ^= 0x1d1ed & (Page::kPageSize - 1);  // I died.
   }
   remembered_unmapped_pages_[remembered_unmapped_pages_index_] =
       reinterpret_cast<Address>(p);
   remembered_unmapped_pages_index_++;
   remembered_unmapped_pages_index_ %= kRememberedUnmappedPages;
 }
 
 } }  // namespace v8::internal