Age code to allow reclaiming old unexecuted functions

src/compiler.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 591 matching lines @@
       info.SetLanguageMode(FLAG_harmony_scoping ? EXTENDED_MODE : STRICT_MODE);
     }
     result = MakeFunctionInfo(&info);
     if (extension == NULL && !result.is_null() && !result->dont_cache()) {
       compilation_cache->PutScript(source, context, result);
     }
   } else {
     if (result->ic_age() != HEAP->global_ic_age()) {
       result->ResetForNewContext(HEAP->global_ic_age());
     }
+    result->code()->MakeYoung();
   }
 
   if (result.is_null()) isolate->ReportPendingMessages();
   return result;
 }
 
 
 Handle<SharedFunctionInfo> Compiler::CompileEval(Handle<String> source,
                                                  Handle<Context> context,
                                                  bool is_global,
@@ skipping 41 matching lines @@
              result->is_extended_mode());
       if (!result->dont_cache()) {
         compilation_cache->PutEval(
             source, context, is_global, result, scope_position);
       }
     }
   } else {
     if (result->ic_age() != HEAP->global_ic_age()) {
       result->ResetForNewContext(HEAP->global_ic_age());
     }
+    result->code()->MakeYoung();
   }
 
   return result;
 }
 
 
 static bool InstallFullCode(CompilationInfo* info) {
   // Update the shared function info with the compiled code and the
   // scope info.  Please note, that the order of the shared function
   // info initialization is important since set_scope_info might
@@ skipping 18 matching lines @@
 
   // Set the optimization hints after performing lazy compilation, as
   // these are not set when the function is set up as a lazily
   // compiled function.
   shared->SetThisPropertyAssignmentsInfo(
       lit->has_only_simple_this_property_assignments(),
       *lit->this_property_assignments());
 
   // Check the function has compiled code.
   ASSERT(shared->is_compiled());
-  shared->set_code_age(0);
   shared->set_dont_optimize(lit->flags()->Contains(kDontOptimize));
   shared->set_dont_inline(lit->flags()->Contains(kDontInline));
   shared->set_ast_node_count(lit->ast_node_count());
 
   if (V8::UseCrankshaft() &&
       !function.is_null() &&
       !shared->optimization_disabled()) {
     // If we're asked to always optimize, we compile the optimized
     // version of the function right away - unless the debugger is
     // active as it makes no sense to compile optimized code then.
@@ skipping 325 matching lines @@
     }
   }
 
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 } }  // namespace v8::internal