Make closures optimizable by Crankshaft compiler.

src/objects.cc

 // Copyright 2010 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 5359 matching lines @@
   // Iterate over all fields in the body but take care in dealing with
   // the code entry.
   IteratePointers(v, kPropertiesOffset, kCodeEntryOffset);
   v->VisitCodeEntry(this->address() + kCodeEntryOffset);
   IteratePointers(v, kCodeEntryOffset + kPointerSize, object_size);
 }
 
 
 void JSFunction::MarkForLazyRecompilation() {
   ASSERT(is_compiled() && !IsOptimized());
-  ASSERT(shared()->allows_lazy_compilation());
+  ASSERT(shared()->allows_lazy_compilation()
+      || code() == shared()->code());

[Kevin Millikin (Chromium), 2010/12/20 12:05:44]

For some reason we like to put || on the first line.  In any case, the second
line should be lined up under the "s" in shared() above it.

[antonm, 2010/12/20 20:39:24]

Done.

   ReplaceCode(Builtins::builtin(Builtins::LazyRecompile));
 }
 
 
 uint32_t JSFunction::SourceHash() {
   uint32_t hash = 0;
   Object* script = shared()->script();
   if (!script->IsUndefined()) {
     Object* source = Script::cast(script)->source();
     if (source->IsUndefined()) hash = String::cast(source)->Hash();
@@ skipping 4354 matching lines @@
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 
 } }  // namespace v8::internal