Only flush SharedFunctionInfo optimized code cache when necessary

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
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@@ skipping 5801 matching lines @@
 
   // Returns index i of the entry with the specified context. At position
   // i - 1 is the context, position i the code, and i + 1 the literals array.
   // Returns -1 when no matching entry is found.
   int SearchOptimizedCodeMap(Context* native_context);
 
   // Installs optimized code from the code map on the given closure. The
   // index has to be consistent with a search result as defined above.
   void InstallFromOptimizedCodeMap(JSFunction* function, int index);
 
-  // Clear optimized code map.
-  void ClearOptimizedCodeMap(const char* reason);
+  // Removed a specific optimized code object from the optimized code map, or
+  // all code objects if |optimized_code| is null.
+  void ClearOptimizedCodeMap(Code* optimized_code, const char* reason);

[Michael Starzinger, 2013/05/13 11:33:15]

Can we add a new EvictFromOptimizedCodeMap function instead that does the trick?
Because those are two different actions and IMHO we should have two different
entry points for that. If at some point the ClearOptmizedCodeMap is no longer
needed we can remove it completely.

 
   // Add a new entry to the optimized code map.
   static void AddToOptimizedCodeMap(Handle<SharedFunctionInfo> shared,
                                     Handle<Context> native_context,
                                     Handle<Code> code,
                                     Handle<FixedArray> literals);
   static const int kEntryLength = 3;
 
   // [scope_info]: Scope info.
   DECL_ACCESSORS(scope_info, ScopeInfo)
@@ skipping 3754 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_