Implement aging of maps embedded in optimized code.

src/lithium-codegen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/lithium-codegen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 199 matching lines @@
         ConstantPoolArray::WEAK_OBJECTS_IN_OPTIMIZED_CODE);
   }
 #ifdef VERIFY_HEAP
   // This disables verification of weak embedded objects after full GC.
   // AddDependentCode can cause a GC, which would observe the state where
   // this code is not yet in the depended code lists of the embedded maps.
   NoWeakObjectVerificationScope disable_verification_of_embedded_objects;
 #endif
   for (int i = 0; i < maps.length(); i++) {
     Map::AddDependentCode(maps.at(i), DependentCode::kWeakCodeGroup, code);
+    isolate()->heap()->CacheEmbeddedMap(maps.at(i));
   }
   for (int i = 0; i < objects.length(); i++) {
     AddWeakObjectToCodeDependency(isolate(), objects.at(i), code);
   }
   for (int i = 0; i < cells.length(); i++) {
     AddWeakObjectToCodeDependency(isolate(), cells.at(i), code);
   }
 }
 
 
@@ skipping 14 matching lines @@
   chunk_->AddDeprecationDependency(map);
 }
 
 
 void LCodeGenBase::AddStabilityDependency(Handle<Map> map) {
   if (!map->is_stable()) return Retry(kMapBecameUnstable);
   chunk_->AddStabilityDependency(map);
 }
 
 } }  // namespace v8::internal