[Intepreter] Extend and move Register class.

src/interpreter/bytecode-array-builder.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 #define V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_
 
 #include <vector>
 
 #include "src/ast.h"
-#include "src/frames.h"
 #include "src/identity-map.h"
 #include "src/interpreter/bytecodes.h"
 #include "src/zone.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 class Isolate;
 
@@ skipping 29 matching lines @@
   BytecodeArrayBuilder& LoadAccumulatorWithRegister(Register reg);
   BytecodeArrayBuilder& StoreAccumulatorInRegister(Register reg);
 
   // Operators.
   BytecodeArrayBuilder& BinaryOperation(Token::Value binop, Register reg);
 
   // Flow Control.
   BytecodeArrayBuilder& Return();
 
  private:
-  static const int kLastParamRegisterIndex =
-      -InterpreterFrameConstants::kLastParamFromRegisterPointer / kPointerSize;
-
   static Bytecode BytecodeForBinaryOperation(Token::Value op);
 
   void Output(Bytecode bytecode, uint8_t r0, uint8_t r1, uint8_t r2);
   void Output(Bytecode bytecode, uint8_t r0, uint8_t r1);
   void Output(Bytecode bytecode, uint8_t r0);
   void Output(Bytecode bytecode);
 
   bool OperandIsValid(Bytecode bytecode, int operand_index,
                       uint8_t operand_value) const;
 
@@ skipping 11 matching lines @@
 
   int parameter_count_;
   int local_register_count_;
   int temporary_register_count_;
   int temporary_register_next_;
 
   friend class TemporaryRegisterScope;
   DISALLOW_IMPLICIT_CONSTRUCTORS(BytecodeArrayBuilder);
 };
 
-// An interpreter register which is located in the function's register file
-// in its stack-frame.
-class Register {
- public:
-  static const int kMaxRegisterIndex = 128;
-  static const int kMinRegisterIndex = -127;
-
-  explicit Register(int index) : index_(index) {
-    DCHECK_LE(index_, kMaxRegisterIndex);
-    DCHECK_GE(index_, kMinRegisterIndex);
-  }
-
-  int index() { return index_; }
-
-  uint8_t ToOperand() { return static_cast<uint8_t>(-index_); }
-  static Register FromOperand(uint8_t operand) {
-    return Register(-static_cast<int8_t>(operand));
-  }
-
- private:
-  void* operator new(size_t size);
-  void operator delete(void* p);
-
-  int index_;
-};
-
 // A stack-allocated class than allows the instantiator to allocate
 // temporary registers that are cleaned up when scope is closed.
 class TemporaryRegisterScope {
  public:
   explicit TemporaryRegisterScope(BytecodeArrayBuilder* builder);
   ~TemporaryRegisterScope();
   Register NewRegister();
 
  private:
   void* operator new(size_t size);
   void operator delete(void* p);
 
   BytecodeArrayBuilder* builder_;
   int count_;
   int last_register_index_;
 
   DISALLOW_COPY_AND_ASSIGN(TemporaryRegisterScope);
 };
 
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODE_ARRAY_BUILDER_H_