[midend]重构中端，建立遍管理器，注册器等，初步构建支配树分析遍，增加基本块方法

src/include/Dom.h

@@ -0,0 +1,52 @@
+#pragma once
+
+#include "Pass.h" // 包含 Pass 框架
+#include "IR.h"   // 包含 IR 定义
+#include <map>
+#include <set>
+#include <vector>
+#include <algorithm>
+
+namespace sysy {
+
+// 支配树分析结果类 (保持不变)
+class DominatorTree : public AnalysisResultBase {
+public:
+    DominatorTree(Function* F);
+    const std::set<BasicBlock*>* getDominators(BasicBlock* BB) const;
+    BasicBlock* getImmediateDominator(BasicBlock* BB) const;
+    const std::set<BasicBlock*>* getDominanceFrontier(BasicBlock* BB) const;
+    const std::map<BasicBlock*, std::set<BasicBlock*>>& getDominatorsMap() const { return Dominators; }
+    const std::map<BasicBlock*, BasicBlock*>& getIDomsMap() const { return IDoms; }
+    const std::map<BasicBlock*, std::set<BasicBlock*>>& getDominanceFrontiersMap() const { return DominanceFrontiers; }
+    void computeDominators(Function* F);
+    void computeIDoms(Function* F);
+    void computeDominanceFrontiers(Function* F);
+private:
+    Function* AssociatedFunction;
+    std::map<BasicBlock*, std::set<BasicBlock*>> Dominators;
+    std::map<BasicBlock*, BasicBlock*> IDoms;
+    std::map<BasicBlock*, std::set<BasicBlock*>> DominanceFrontiers;
+};
+
+
+// 支配树分析遍
+class DominatorTreeAnalysisPass : public AnalysisPass {
+public:
+    // 唯一的 Pass ID
+    static char ID; // LLVM 风格的唯一 ID
+
+    DominatorTreeAnalysisPass() : AnalysisPass("DominatorTreeAnalysis", Pass::Granularity::Function) {}
+
+    // 实现 getPassID
+    void* getPassID() const override { return &ID; }
+
+    bool runOnFunction(Function* F) override;
+
+    std::unique_ptr<AnalysisResultBase> getResult() override;
+
+private:
+    std::unique_ptr<DominatorTree> CurrentDominatorTree;
+};
+
+} // namespace sysy