Fix a bug that prevents constants from overwriting function values in object ...

src/ast.h

Index: src/ast.h
===================================================================
--- src/ast.h	(revision 5712)
+++ src/ast.h	(working copy)
@@ -832,10 +832,14 @@
 
     bool IsCompileTimeValue();
 
+    void set_emit_store(bool emit_store);
+    bool emit_store();
+
    private:
     Literal* key_;
     Expression* value_;
     Kind kind_;
+    bool emit_store_;
   };
 
   ObjectLiteral(Handle<FixedArray> constant_properties,
@@ -858,6 +862,12 @@
 
   bool fast_elements() const { return fast_elements_; }
 
+
+  // Mark all computed expressions that are bound to a key that
+  // is shadowed by a later occurrence of the same key. For the
+  // marked expressions, no store code is emitted.
+  void CalculateEmitStore();
+
  private:
   Handle<FixedArray> constant_properties_;
   ZoneList<Property*>* properties_;