Reorder switch clauses using newly-introduced execution counters in

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 7a57448c444199d16f2a58bfe8564cd4d298998d..06f364dc95f80c6ebc3112312738458d6305d9ef 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1395,6 +1395,22 @@ class HOptimizedGraphBuilder: public HGraphBuilder, public AstVisitor {
     BreakAndContinueScope* next_;
   };
 
+  class ClauseMapping : public ZoneObject {
+   public:
+    ClauseMapping(int index, CaseClause* clause) : index_(index),
+                                                   clause_(clause) {
+    }
+
+    inline int index() const { return index_; }
+    inline CaseClause* clause() const { return clause_; }
+
+    static int HitCountOrder(ClauseMapping* const* a, ClauseMapping* const* b);
+
+   private:
+    int index_;
+    CaseClause* clause_;
+  };
+
   explicit HOptimizedGraphBuilder(CompilationInfo* info);
 
   virtual bool BuildGraph();
@@ -1406,6 +1422,7 @@ class HOptimizedGraphBuilder: public HGraphBuilder, public AstVisitor {
   bool inline_bailout() { return inline_bailout_; }
 
   void AddSoftDeoptimize();
+  HDeoptCounter* AddDeoptCounter(int initial_value, int max_value);
 
   void Bailout(const char* reason);
 
@@ -1792,6 +1809,7 @@ class HOptimizedGraphBuilder: public HGraphBuilder, public AstVisitor {
   BreakAndContinueScope* break_scope_;
 
   int inlined_count_;
+  int deopt_counter_count_;
   ZoneList<Handle<Object> > globals_;
 
   bool inline_bailout_;