Reorder switch clauses using newly-introduced execution counters in

src/x64/lithium-x64.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 75 matching lines @@
   V(CmpMapAndBranch)                            \
   V(CmpT)                                       \
   V(ConstantD)                                  \
   V(ConstantI)                                  \
   V(ConstantS)                                  \
   V(ConstantT)                                  \
   V(Context)                                    \
   V(DebugBreak)                                 \
   V(DeclareGlobals)                             \
   V(DeleteProperty)                             \
+  V(DeoptCounter)                               \
+  V(DeoptCounterAdd)                            \
   V(Deoptimize)                                 \
   V(DivI)                                       \
   V(DoubleToI)                                  \
   V(DoubleToSmi)                                \
   V(DummyUse)                                   \
   V(ElementsKind)                               \
   V(FixedArrayBaseLength)                       \
   V(MapEnumLength)                              \
   V(FunctionLiteral)                            \
   V(GetCachedArrayIndex)                        \
@@ skipping 319 matching lines @@
 
 class LDummyUse: public LTemplateInstruction<1, 1, 0> {
  public:
   explicit LDummyUse(LOperand* value) {
     inputs_[0] = value;
   }
   DECLARE_CONCRETE_INSTRUCTION(DummyUse, "dummy-use")
 };
 
 
+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")
 };
 
 
 class LLabel: public LGap {
  public:
   explicit LLabel(HBasicBlock* block)
       : LGap(block), replacement_(NULL) { }
@@ skipping 2304 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::int
 
 #endif  // V8_X64_LITHIUM_X64_H_