合并backend、backend-IRC到midend
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20
src/include/backend/RISCv64/Handler/EliminateFrameIndices.h
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20
src/include/backend/RISCv64/Handler/EliminateFrameIndices.h
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#ifndef ELIMINATE_FRAME_INDICES_H
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#define ELIMINATE_FRAME_INDICES_H
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#include "RISCv64LLIR.h"
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namespace sysy {
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class EliminateFrameIndicesPass {
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public:
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// Pass 的主入口函数
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void runOnMachineFunction(MachineFunction* mfunc);
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private:
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// 帮助计算类型大小的辅助函数,从原RegAlloc中移出
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unsigned getTypeSizeInBytes(Type* type);
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};
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} // namespace sysy
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#endif // ELIMINATE_FRAME_INDICES_H
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@@ -22,7 +22,6 @@ private:
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// 函数级代码生成 (实现新的流水线)
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std::string function_gen(Function* func);
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// 私有辅助函数,用于根据类型计算其占用的字节数。
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unsigned getTypeSizeInBytes(Type* type);
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@@ -3,6 +3,7 @@
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#include "IR.h" // 确保包含了您自己的IR头文件
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#include <string>
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#include <iostream>
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#include <vector>
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#include <memory>
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#include <cstdint>
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@@ -38,7 +39,7 @@ enum class PhysicalReg {
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// 用于内部表示物理寄存器在干扰图中的节点ID(一个简单的特殊ID,确保不与vreg_counter冲突)
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// 假设 vreg_counter 不会达到这么大的值
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PHYS_REG_START_ID = 100000,
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PHYS_REG_START_ID = 1000000,
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PHYS_REG_END_ID = PHYS_REG_START_ID + 320, // 预留足够的空间
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};
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@@ -195,6 +196,11 @@ public:
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preg = new_preg;
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is_virtual = false;
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}
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void setVRegNum(unsigned new_vreg_num) {
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vreg_num = new_vreg_num;
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is_virtual = true; // 确保设置vreg时,操作数状态正确
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}
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private:
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unsigned vreg_num = 0;
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PhysicalReg preg = PhysicalReg::ZERO;
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@@ -274,14 +280,15 @@ private:
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// 栈帧信息
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struct StackFrameInfo {
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int locals_size = 0; // 仅为AllocaInst分配的大小
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int locals_end_offset = 0; // 记录局部变量分配结束后的偏移量(相对于s0,为负)
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int spill_size = 0; // 仅为溢出分配的大小
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int total_size = 0; // 总大小
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int callee_saved_size = 0; // 保存寄存器的大小
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std::map<unsigned, int> alloca_offsets; // <AllocaInst的vreg, 栈偏移>
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std::map<unsigned, int> spill_offsets; // <溢出vreg, 栈偏移>
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std::set<PhysicalReg> used_callee_saved_regs; // 使用的保存寄存器
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std::map<unsigned, PhysicalReg> vreg_to_preg_map;
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std::vector<PhysicalReg> callee_saved_regs; // 用于存储需要保存的被调用者保存寄存器列表
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std::map<unsigned, PhysicalReg> vreg_to_preg_map; // RegAlloc最终的分配结果
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std::vector<PhysicalReg> callee_saved_regs_to_store; // 已排序的、需要存取的被调用者保存寄存器
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};
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// 机器函数
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@@ -295,7 +302,7 @@ public:
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StackFrameInfo& getFrameInfo() { return frame_info; }
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const std::vector<std::unique_ptr<MachineBasicBlock>>& getBlocks() const { return blocks; }
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std::vector<std::unique_ptr<MachineBasicBlock>>& getBlocks() { return blocks; }
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void dumpStackFrameInfo(std::ostream& os = std::cerr) const;
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void addBlock(std::unique_ptr<MachineBasicBlock> block) {
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blocks.push_back(std::move(block));
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}
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@@ -8,6 +8,7 @@
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#include "CalleeSavedHandler.h"
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#include "LegalizeImmediates.h"
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#include "PrologueEpilogueInsertion.h"
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#include "EliminateFrameIndices.h"
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#include "Pass.h"
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#include "DivStrengthReduction.h"
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@@ -3,9 +3,15 @@
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#include "RISCv64LLIR.h"
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#include "RISCv64ISel.h" // 包含 RISCv64ISel.h 以访问 ISel 和 Value 类型
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#include <set>
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#include <vector>
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#include <map>
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#include <stack>
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extern int DEBUG;
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extern int DEEPDEBUG;
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extern int DEBUGLENGTH; // 用于限制调试输出的长度
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extern int DEEPERDEBUG; // 用于更深层次的调试输出
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namespace sysy {
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@@ -17,58 +23,98 @@ public:
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void run();
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private:
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using LiveSet = std::set<unsigned>; // 活跃虚拟寄存器集合
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using InterferenceGraph = std::map<unsigned, std::set<unsigned>>;
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// 类型定义,与Python版本对应
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using VRegSet = std::set<unsigned>;
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using InterferenceGraph = std::map<unsigned, VRegSet>;
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using VRegStack = std::vector<unsigned>; // 使用vector模拟栈,方便遍历
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using MoveList = std::map<unsigned, std::set<const MachineInstr*>>;
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using AliasMap = std::map<unsigned, unsigned>;
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using ColorMap = std::map<unsigned, PhysicalReg>;
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using VRegMoveSet = std::set<const MachineInstr*>;
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// 栈帧管理
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void eliminateFrameIndices();
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// 活跃性分析
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// --- 核心算法流程 ---
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void initialize();
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void build();
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void makeWorklist();
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void simplify();
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void coalesce();
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void freeze();
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void selectSpill();
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void assignColors();
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void rewriteProgram();
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bool doAllocation();
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void applyColoring();
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void dumpState(const std::string &stage);
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void precolorByCallingConvention();
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// --- 辅助函数 ---
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void getInstrUseDef(const MachineInstr* instr, VRegSet& use, VRegSet& def);
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void getInstrUseDef_Liveness(const MachineInstr *instr, VRegSet &use, VRegSet &def);
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void addEdge(unsigned u, unsigned v);
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VRegSet adjacent(unsigned n);
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VRegMoveSet nodeMoves(unsigned n);
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bool moveRelated(unsigned n);
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void decrementDegree(unsigned m);
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void enableMoves(const VRegSet& nodes);
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unsigned getAlias(unsigned n);
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void addWorklist(unsigned u);
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bool briggsHeuristic(unsigned u, unsigned v);
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bool georgeHeuristic(unsigned u, unsigned v);
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void combine(unsigned u, unsigned v);
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void freezeMoves(unsigned u);
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void collectUsedCalleeSavedRegs();
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bool isFPVReg(unsigned vreg) const;
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std::string regToString(PhysicalReg reg);
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std::string regIdToString(unsigned id);
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// --- 活跃性分析 ---
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void analyzeLiveness();
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// 构建干扰图
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void buildInterferenceGraph();
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// 图着色分配寄存器
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void colorGraph();
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// 重写函数,替换vreg并插入溢出代码
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void rewriteFunction();
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// 辅助函数,获取指令的Use/Def集合
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void getInstrUseDef(MachineInstr* instr, LiveSet& use, LiveSet& def);
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// 辅助函数,处理调用约定
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void handleCallingConvention();
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MachineFunction* MFunc;
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// 活跃性分析结果
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std::map<const MachineInstr*, LiveSet> live_in_map;
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std::map<const MachineInstr*, LiveSet> live_out_map;
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RISCv64ISel* ISel;
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// 干扰图
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InterferenceGraph interference_graph;
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// 图着色结果
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std::map<unsigned, PhysicalReg> color_map; // vreg -> preg
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std::set<unsigned> spilled_vregs; // 被溢出的vreg集合
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// 可用的物理寄存器池
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// --- 算法数据结构 ---
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// 寄存器池
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std::vector<PhysicalReg> allocable_int_regs;
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std::vector<PhysicalReg> allocable_fp_regs;
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int K_int; // 整数寄存器数量
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int K_fp; // 浮点寄存器数量
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// 存储vreg到IR Value*的反向映射
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// 这个map将在run()函数开始时被填充,并在rewriteFunction()中使用。
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std::map<unsigned, Value*> vreg_to_value_map;
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std::map<PhysicalReg, unsigned> preg_to_vreg_id_map; // 物理寄存器到特殊vreg ID的映射
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// 用于计算类型大小的辅助函数
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unsigned getTypeSizeInBytes(Type* type);
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// 节点集合
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VRegSet precolored; // 预着色的节点 (物理寄存器)
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VRegSet initial; // 初始的、所有待处理的虚拟寄存器节点
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VRegSet simplifyWorklist;
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VRegSet freezeWorklist;
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VRegSet spillWorklist;
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VRegSet spilledNodes;
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VRegSet coalescedNodes;
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VRegSet coloredNodes;
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VRegStack selectStack;
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// 辅助函数,用于打印集合
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static void printLiveSet(const LiveSet& s, const std::string& name, std::ostream& os);
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// Move指令相关
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std::set<const MachineInstr*> coalescedMoves;
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std::set<const MachineInstr*> constrainedMoves;
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std::set<const MachineInstr*> frozenMoves;
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std::set<const MachineInstr*> worklistMoves;
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std::set<const MachineInstr*> activeMoves;
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// 数据结构
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InterferenceGraph adjSet;
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std::map<unsigned, VRegSet> adjList; // 邻接表
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std::map<unsigned, int> degree;
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MoveList moveList;
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AliasMap alias;
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ColorMap color_map;
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// 活跃性分析结果
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std::map<const MachineInstr*, VRegSet> live_in_map;
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std::map<const MachineInstr*, VRegSet> live_out_map;
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// VReg -> Value* 和 VReg -> Type* 的映射
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const std::map<unsigned, Value*>& vreg_to_value_map;
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const std::map<unsigned, Type*>& vreg_type_map;
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};
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} // namespace sysy
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