Instruction.h

#ifndef MISAKA_INSTRUCTION
#define MISAKA_INSTRUCTION

#include <string>
#include <map>

#include "Value.h"
#include "User.h"
#include "Type.h"
#include "Constant.h"
#include "BasicBlock.h"
#include "Function.h"

class BasicBlock;
class Function;
class IRVisitor;

namespace ASM {
    class Operand2;
    class Reg;
    class VIntReg;
    class RIntReg;
    class VFpReg;
    class RFpReg;
    class Constant;
    class ConstantInt;
    class ConstantFloat;
    class ShiftReg;
    class ShiftVal;
    class ASMInstruction;
    class Condition;
    class SMark;
    class Func;
    class Block;
}

class Instruction;
class BinaryInstr;
class CmpInstr;
class FCmpInstr;
class CallInstr;
class BranchInstr;
class ReturnInstr;
class GetElementPtrInstr;
class StoreInstr;
class LoadInstr;
class AllocaInstr;
class ZextInstr;
class FpToSiInstr;
class SiToFpInstr;
class PhiInstr;

// FIXME:有没有必要添加id？id的用处是什么？
class Instruction : public User
{

public:
    enum InstrID
    {
        // 终止指令
        ret,
        br,
        // 整数二元运算
        add,
        sub,
        mul,
        sdiv,
        srem,
        // 浮点数二元运算
        fadd,