Instruction.h

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// Copyright (c) 2018 the Talvos developers. All rights reserved.
//
// This file is distributed under a three-clause BSD license. For full license
// terms please see the LICENSE file distributed with this source code.


#ifndef TALVOS_INSTRUCTION_H
#define TALVOS_INSTRUCTION_H

#include <cstdint>
#include <memory>

namespace talvos
{

class Type;

class Instruction
{
public:
  Instruction(uint16_t Opcode, uint16_t NumOperands, const uint32_t *Operands,
              const Type *ResultType);

  ~Instruction() { delete[] Operands; }

  // Do not allow Instruction objects to be copied.
  Instruction(const Instruction &) = delete;
  const Instruction &operator=(const Instruction &) = delete;

  uint16_t getNumOperands() const { return NumOperands; }

  uint16_t getOpcode() const { return Opcode; }

  uint32_t getOperand(unsigned i) const { return Operands[i]; }

  const uint32_t *getOperands() const { return Operands; }

  const Type *getResultType() const { return ResultType; }

  void insertAfter(Instruction *I);

  const Instruction *next() const { return Next.get(); }

  const Instruction *previous() const { return Previous; }

  void print(std::ostream &O, bool Align = true) const;

  static const char *opcodeToString(uint16_t Opcode);

private:
  const Type *ResultType; 
  uint16_t Opcode;        
  uint16_t NumOperands;   
  uint32_t *Operands;     

  std::unique_ptr<Instruction> Next; 

  const Instruction *Previous; 
};

} // namespace talvos

#endif