Reorder switch clauses using newly-introduced execution counters in

src/ast.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 987 matching lines @@
              ZoneList<Statement*>* statements,
              int pos);
 
   bool is_default() const { return label_ == NULL; }
   Expression* label() const {
     CHECK(!is_default());
     return label_;
   }
   Label* body_target() { return &body_target_; }
   ZoneList<Statement*>* statements() const { return statements_; }
+  int hit_count() { return hit_count_; }
 
   int position() const { return position_; }
   void set_position(int pos) { position_ = pos; }
 
   BailoutId EntryId() const { return entry_id_; }
 
   // Type feedback information.
   TypeFeedbackId CompareId() { return compare_id_; }
+  TypeFeedbackId CounterId() { return counter_id_; }
   void RecordTypeFeedback(TypeFeedbackOracle* oracle);
   bool IsSmiCompare() { return compare_type_ == SMI_ONLY; }
   bool IsNameCompare() { return compare_type_ == NAME_ONLY; }
   bool IsStringCompare() { return compare_type_ == STRING_ONLY; }
   bool IsObjectCompare() { return compare_type_ == OBJECT_ONLY; }
 
  private:
   Expression* label_;
   Label body_target_;
   ZoneList<Statement*>* statements_;
   int position_;
   enum CompareTypeFeedback {
     NONE,
     SMI_ONLY,
     NAME_ONLY,
     STRING_ONLY,
     OBJECT_ONLY
   };
   CompareTypeFeedback compare_type_;
+  int hit_count_;
   const TypeFeedbackId compare_id_;
+  const TypeFeedbackId counter_id_;
   const BailoutId entry_id_;
 };
 
 
 class SwitchStatement: public BreakableStatement {
  public:
   DECLARE_NODE_TYPE(SwitchStatement)
 
   void Initialize(Expression* tag, ZoneList<CaseClause*>* cases) {
     tag_ = tag;
@@ skipping 2085 matching lines @@
  private:
   Isolate* isolate_;
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_