Revert "Continued fix for 351257. Reusing the feedback vector is too complex."

src/full-codegen.h

 // 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 419 matching lines @@
                              Expression* sub_expr,
                              NilValue nil);
 
   // Bailout support.
   void PrepareForBailout(Expression* node, State state);
   void PrepareForBailoutForId(BailoutId id, State state);
 
   // Feedback slot support. The feedback vector will be cleared during gc and
   // collected by the type-feedback oracle.
   Handle<FixedArray> FeedbackVector() {
-    return info_->feedback_vector();
+    return feedback_vector_;
   }
+  void StoreFeedbackVectorSlot(int slot, Handle<Object> object) {
+    feedback_vector_->set(slot, *object);
+  }
+  void InitializeFeedbackVector();
 
   // Record a call's return site offset, used to rebuild the frame if the
   // called function was inlined at the site.
   void RecordJSReturnSite(Call* call);
 
   // Prepare for bailout before a test (or compare) and branch.  If
   // should_normalize, then the following comparison will not handle the
   // canonical JS true value so we will insert a (dead) test against true at
   // the actual bailout target from the optimized code. If not
   // should_normalize, the true and false labels are ignored.
@@ skipping 381 matching lines @@
   int loop_depth_;
   ZoneList<Handle<Object> >* globals_;
   Handle<FixedArray> modules_;
   int module_index_;
   const ExpressionContext* context_;
   ZoneList<BailoutEntry> bailout_entries_;
   GrowableBitVector prepared_bailout_ids_;
   ZoneList<BackEdgeEntry> back_edges_;
   int ic_total_count_;
   Handle<FixedArray> handler_table_;
+  Handle<FixedArray> feedback_vector_;
   Handle<Cell> profiling_counter_;
   bool generate_debug_code_;
 
   friend class NestedStatement;
 
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
   DISALLOW_COPY_AND_ASSIGN(FullCodeGenerator);
 };
 
 
@@ skipping 102 matching lines @@
 
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_