A64: Implement LOsrEntry and LUnknownOSRValue

src/a64/lithium-a64.h

 // Copyright 2013 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 175 matching lines @@
   V(SubI)                                       \
   V(TaggedToI)                                  \
   V(ThisFunction)                               \
   V(Throw)                                      \
   V(ToFastProperties)                           \
   V(TransitionElementsKind)                     \
   V(TrapAllocationMemento)                      \
   V(Typeof)                                     \
   V(TypeofIsAndBranch)                          \
   V(Uint32ToDouble)                             \
+  V(UnknownOSRValue)                            \
   V(ValueOf)                                    \
   V(CheckMapValue)                              \
   V(LoadFieldByIndex)                           \
   V(WrapReceiver)
 
 
 #define DECLARE_CONCRETE_INSTRUCTION(type, mnemonic)              \
   virtual Opcode opcode() const { return LInstruction::k##type; } \
   virtual void CompileToNative(LCodeGen* generator);              \
   virtual const char* Mnemonic() const { return mnemonic; }       \
@@ skipping 109 matching lines @@
   int TempCount() { return T; }
   LOperand* TempAt(int i) { return temps_[i]; }
 
  protected:
   EmbeddedContainer<LOperand*, R> results_;
   EmbeddedContainer<LOperand*, I> inputs_;
   EmbeddedContainer<LOperand*, T> temps_;
 };
 
 
+class LUnknownOSRValue: public LTemplateInstruction<1, 0, 0> {
+ public:
+  virtual bool HasInterestingComment(LCodeGen* gen) const { return false; }
+  DECLARE_CONCRETE_INSTRUCTION(UnknownOSRValue, "unknown-osr-value")
+};
+
+
 template<int I, int T>
 class LControlInstruction: public LTemplateInstruction<0, I, T> {
  public:
   LControlInstruction() : false_label_(NULL), true_label_(NULL) { }
 
   virtual bool IsControl() const { return true; }
 
   int SuccessorCount() { return hydrogen()->SuccessorCount(); }
   HBasicBlock* SuccessorAt(int i) { return hydrogen()->SuccessorAt(i); }
 
@@ skipping 2541 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_LITHIUM_A64_H_