Reorder switch clauses using newly-introduced execution counters in

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 36b080ff4bdedb598cb7d5feb9d8c9559cd9915e..e145f226efa3ff5db7ff37681bd975a95f8a27b0 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -93,6 +93,8 @@ class LCodeGen;
   V(DebugBreak)                                 \
   V(DeclareGlobals)                             \
   V(DeleteProperty)                             \
+  V(DeoptCounter)                               \
+  V(DeoptCounterAdd)                            \
   V(Deoptimize)                                 \
   V(DivI)                                       \
   V(DoubleToI)                                  \
@@ -432,6 +434,51 @@ class LDummyUse: public LTemplateInstruction<1, 1, 0> {
 };
 
 
+class LDeoptCounter: public LTemplateInstruction<0, 0, 0> {
+ public:
+  LDeoptCounter(int id, int initial_value, int max_value)
+      : id_(id),
+        initial_value_(initial_value),
+        max_value_(max_value) {
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(DeoptCounter, "deopt_counter")
+
+  int id() const { return id_; }
+  int initial_value() const { return initial_value_; }
+  int max_value() const { return max_value_; }
+
+ private:
+  int id_;
+  int initial_value_;
+  int max_value_;
+};
+
+
+class LDeoptCounterAdd: public LTemplateInstruction<0, 0, 2> {
+ public:
+  LDeoptCounterAdd(int counter,
+                   int delta,
+                   LOperand* temp,
+                   LOperand* temp2) : counter_(counter),
+                                      delta_(delta) {
+    temps_[0] = temp;
+    temps_[1] = temp2;
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(DeoptCounterAdd, "deopt_counter_add")
+
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  int counter() const { return counter_; }
+  int delta() const { return delta_; }
+
+ private:
+  int counter_;
+  int delta_;
+};
+
+
 class LDeoptimize: public LTemplateInstruction<0, 0, 0> {
  public:
   DECLARE_CONCRETE_INSTRUCTION(Deoptimize, "deoptimize")