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#pragma once
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#include <initializer_list>
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#include <iosfwd>
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#include <memory>
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#include <string>
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#include <vector>
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namespace ir {
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class Module;
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}
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namespace mir {
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class MIRContext {
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public:
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MIRContext() = default;
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};
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MIRContext& DefaultContext();
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enum class PhysReg {
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//W0, W8, W9, X29, X30, SP
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// 32位通用寄存器
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W0, W1, W2, W3, W4, W5, W6, W7, // 参数传递/临时
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W8, W9, // 临时寄存器（当前主要使用）
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W10, W11, W12, W13, W14, W15, // 临时寄存器（扩展）
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W16, W17, // intra-procedure-call 临时
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W18, // 平台预留
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W19, W20, W21, W22, W23, W24, // 被调用者保存（扩展用）
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W25, W26, W27, W28, // 被调用者保存
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W29, // 帧指针 (FP)
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W30, // 链接寄存器 (LR)
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// 64位版本
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X0, X1, X2, X3, X4, X5, X6, X7,
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X8, X9, X10, X11, X12, X13, X14, X15,
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X16, X17, X18,
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X19, X20, X21, X22, X23, X24, X25, X26, X27, X28,
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X29, // FP
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X30, // LR
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// 浮点寄存器 (32位)
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S0, S1, S2, S3, S4, S5, S6, S7,
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S8, S9, S10, S11, S12, S13, S14, S15,
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S16, S17, S18, S19, S20, S21, S22, S23,
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S24, S25, S26, S27, S28, S29, S30, S31,
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// 特殊寄存器
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SP, // 栈指针
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ZR, // 零寄存器
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};
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const char* PhysRegName(PhysReg reg);
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// ========== 条件码枚举（用于 BCond 指令）==========
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enum class CondCode {
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EQ, // 相等 (equal)
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NE, // 不等 (not equal)
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CS, // 进位设置 (carry set) / 无符号大于等于
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CC, // 进位清除 (carry clear) / 无符号小于
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MI, // 负数 (minus)
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PL, // 非负数 (plus)
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VS, // 溢出 (overflow set)
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VC, // 无溢出 (overflow clear)
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HI, // 无符号大于 (higher)
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LS, // 无符号小于等于 (lower or same)
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GE, // 有符号大于等于 (greater or equal)
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LT, // 有符号小于 (less than)
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GT, // 有符号大于 (greater than)
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LE, // 有符号小于等于 (less or equal)
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AL, // 总是 (always)
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};
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const char* CondCodeName(CondCode cc);
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// ========== MIR 指令操作码枚举 ==========
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enum class Opcode {
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// ---------- 栈帧相关 ----------
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Prologue, // 函数序言（伪指令）
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Epilogue, // 函数尾声（伪指令）
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// ---------- 数据传输 ----------
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MovImm, // 立即数移动到寄存器: MOV w8, #imm
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MovReg, // 寄存器之间移动: MOV w8, w9
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LoadStack, // 从栈槽加载: LDR w8, [sp, #offset]
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StoreStack, // 存储到栈槽: STR w8, [sp, #offset]
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LoadStackPair,// 成对加载: LDP x29, x30, [sp], #16
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StoreStackPair,// 成对存储: STP x29, x30, [sp, #-16]!
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// ---------- 整数算术运算 ----------
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AddRR, // 加法: ADD w8, w8, w9
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AddRI, // 加法（立即数）: ADD w8, w8, #imm
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SubRR, // 减法: SUB w8, w8, w9
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SubRI, // 减法（立即数）: SUB w8, w8, #imm
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MulRR, // 乘法: MUL w8, w8, w9
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SDivRR, // 有符号除法: SDIV w8, w8, w9
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UDivRR, // 无符号除法: UDIV w8, w8, w9
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// ---------- 浮点算术运算 ----------
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FAddRR, // 浮点加法: FADD s0, s0, s1
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FSubRR, // 浮点减法: FSUB s0, s0, s1
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FMulRR, // 浮点乘法: FMUL s0, s0, s1
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FDivRR, // 浮点除法: FDIV s0, s0, s1
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// ---------- 比较运算 ----------
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CmpRR, // 比较（寄存器）: CMP w8, w9
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CmpRI, // 比较（立即数）: CMP w8, #imm
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FCmpRR, // 浮点比较: FCMP s0, s1
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// ---------- 类型转换 ----------
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SIToFP, // 有符号整数转浮点: SCVTF s0, w0
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FPToSI, // 浮点转有符号整数: FCVTZS w0, s0
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ZExt, // 零扩展（i1 -> i32）: AND w8, w8, #1
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// ---------- 控制流 ----------
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B, // 无条件跳转: B label
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BCond, // 条件跳转: B.EQ label, B.NE label, B.GT label 等
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Call, // 函数调用: BL target
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Ret, // 函数返回: RET
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// ---------- 逻辑运算 ----------
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AndRR, // 按位与: AND w8, w8, w9
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OrRR, // 按位或: ORR w8, w8, w9
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EorRR, // 按位异或: EOR w8, w8, w9
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LslRR, // 逻辑左移: LSL w8, w8, w9
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LsrRR, // 逻辑右移: LSR w8, w8, w9
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AsrRR, // 算术右移: ASR w8, w8, w9
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// ---------- 特殊 ----------
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Nop, // 空操作: NOP
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Label, // 内联标签，不生成实际指令，仅输出标签名
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// 添加
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Movk, // movk Rd, #imm16, lsl #shift
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};
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// ========== 操作数类 ==========
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class Operand {
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public:
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enum class Kind { Reg, Imm, FrameIndex, Cond, Label };
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static Operand Reg(PhysReg reg);
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static Operand Imm(int value);
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static Operand FrameIndex(int index);
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static Operand Cond(CondCode cc);
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static Operand Label(const std::string& label);
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Kind GetKind() const { return kind_; }
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PhysReg GetReg() const { return reg_; }
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int GetImm() const { return imm_; }
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int GetFrameIndex() const { return imm_; }
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CondCode GetCondCode() const { return cc_; }
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const std::string& GetLabel() const { return label_; }
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private:
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Operand(Kind kind, PhysReg reg, int imm, CondCode cc, const std::string& label);
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Kind kind_;
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PhysReg reg_;
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int imm_;
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CondCode cc_;
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std::string label_;
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};
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// ========== MIR 指令类 ==========
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class MachineInstr {
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public:
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MachineInstr(Opcode opcode, std::vector<Operand> operands = {});
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Opcode GetOpcode() const { return opcode_; }
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const std::vector<Operand>& GetOperands() const { return operands_; }
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private:
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Opcode opcode_;
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std::vector<Operand> operands_;
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};
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// ========== 栈槽结构 ==========
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struct FrameSlot {
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int index = 0;
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int size = 4;
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int offset = 0;
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};
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// ========== MIR 基本块 ==========
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class MachineBasicBlock {
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public:
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explicit MachineBasicBlock(std::string name);
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const std::string& GetName() const { return name_; }
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std::vector<MachineInstr>& GetInstructions() { return instructions_; }
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const std::vector<MachineInstr>& GetInstructions() const { return instructions_; }
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MachineInstr& Append(Opcode opcode,
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std::initializer_list<Operand> operands = {});
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MachineInstr& Append(Opcode opcode, std::vector<Operand> operands);
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// 控制流信息
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std::vector<MachineBasicBlock*>& GetSuccessors() { return successors_; }
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const std::vector<MachineBasicBlock*>& GetSuccessors() const { return successors_; }
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void AddSuccessor(MachineBasicBlock* succ) { successors_.push_back(succ); }
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private:
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std::string name_;
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std::vector<MachineInstr> instructions_;
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std::vector<MachineBasicBlock*> successors_;
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};
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// ========== MIR 函数 ==========
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class MachineFunction {
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public:
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explicit MachineFunction(std::string name);
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const std::string& GetName() const { return name_; }
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// 基本块管理
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MachineBasicBlock& GetEntry() { return entry_; }
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const MachineBasicBlock& GetEntry() const { return entry_; }
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std::vector<std::unique_ptr<MachineBasicBlock>>& GetBasicBlocks() {
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return basic_blocks_;
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}
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const std::vector<std::unique_ptr<MachineBasicBlock>>& GetBasicBlocks() const {
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return basic_blocks_;
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}
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void AddBasicBlock(std::unique_ptr<MachineBasicBlock> bb) {
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basic_blocks_.push_back(std::move(bb));
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}
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// 栈槽管理
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int CreateFrameIndex(int size = 4);
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FrameSlot& GetFrameSlot(int index);
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const FrameSlot& GetFrameSlot(int index) const;
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std::vector<FrameSlot>& GetFrameSlots() { return frame_slots_; }
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const std::vector<FrameSlot>& GetFrameSlots() const { return frame_slots_; }
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// 栈帧大小
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int GetFrameSize() const { return frame_size_; }
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void SetFrameSize(int size) { frame_size_ = size; }
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private:
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std::string name_;
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MachineBasicBlock entry_;
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std::vector<std::unique_ptr<MachineBasicBlock>> basic_blocks_;
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std::vector<FrameSlot> frame_slots_;
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int frame_size_ = 0;
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};
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// ========== MIR 模块 ==========
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class MachineModule {
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public:
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MachineModule() = default;
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// 添加 MachineFunction
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void AddFunction(std::unique_ptr<MachineFunction> func) {
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functions_.push_back(std::move(func));
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}
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// 获取所有函数
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const std::vector<std::unique_ptr<MachineFunction>>& GetFunctions() const {
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return functions_;
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}
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std::vector<std::unique_ptr<MachineFunction>>& GetFunctions() {
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return functions_;
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}
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// 根据名称查找函数
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MachineFunction* GetFunction(const std::string& name) {
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for (auto& func : functions_) {
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if (func->GetName() == name) {
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return func.get();
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}
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}
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return nullptr;
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}
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const MachineFunction* GetFunction(const std::string& name) const {
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for (const auto& func : functions_) {
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if (func->GetName() == name) {
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return func.get();
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}
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}
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return nullptr;
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}
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private:
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std::vector<std::unique_ptr<MachineFunction>> functions_;
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};
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// ========== 后端流程函数 ==========
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/* std::unique_ptr<MachineFunction> LowerToMIR(const ir::Module& module);
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void RunRegAlloc(MachineFunction& function);
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void RunFrameLowering(MachineFunction& function);
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void PrintAsm(const MachineFunction& function, std::ostream& os); */
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std::unique_ptr<MachineModule> LowerToMIR(const ir::Module& module);
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void RunRegAlloc(MachineModule& module);
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void RunFrameLowering(MachineModule& module);
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void PrintAsm(const MachineModule& module, std::ostream& os);
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} // namespace mir
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