[midend]更新遍静态ID定义方法，

注册遍模板函数重构（针对遍的不同构造方法），
修复phi指令更新引起的旧代码错误，
将CFG优化适配到现有终端框架中，
独立CFG优化方法使得其他优化遍能独立调用，
usedelete方法回调取消删除功能。
IRGenerator代码风格修改。

src/include/SysYIRCFGOpt.h

@@ -2,6 +2,7 @@
 
 #include "IR.h"
 #include "IRBuilder.h"
+#include "Pass.h"
 
 namespace sysy {
 
@@ -17,44 +18,79 @@ namespace sysy {
 // - 合并连续的跳转指令（Jump Threading）在合并不可达块中似乎已经实现了
 // - 基本块重排序（Block Reordering），提升局部性
 
-class SysYCFGOpt {
- private:
-  Module *pModule;
-  IRBuilder *pBuilder;
-
- public:
-  SysYCFGOpt(Module *pMoudle, IRBuilder *pBuilder) : pModule(pMoudle), pBuilder(pBuilder) {}
-
-  void SysYOptimizateAfterIR(){
-    
-    auto &functions = pModule->getFunctions();
-    for (auto &function : functions) {
-      bool changed = false;
-      while(changed){
-        changed = false;
-        changed |= SysYCondBr2Br(function.second.get(), pBuilder);
-        // 删除br后面的无用指令
-        changed |= SysYDelInstAfterBr(function.second.get());
-        // 合并空基本块
-        changed |= SysYBlockMerge(function.second.get());
-        // 删除无前驱块
-        changed |= SysYDelNoPreBLock(function.second.get());
-        // 删除空块
-        changed |= SysYDelEmptyBlock(function.second.get(), pBuilder);
-        // 添加return指令
-        changed |= SysYAddReturn(function.second.get(), pBuilder);
-      }
-    }
-  }
-
+// 辅助工具类，包含实际的CFG优化逻辑
+// 这些方法可以被独立的Pass调用
+class SysYCFGOptUtils {
 public:
   static bool SysYDelInstAfterBr(Function *func); // 删除br后面的指令
   static bool SysYDelEmptyBlock(Function *func, IRBuilder* pBuilder); // 空块删除
   static bool SysYDelNoPreBLock(Function *func); // 删除无前驱块（不可达块）
-  static bool SysYBlockMerge(Function *func);    // 合并基本块(主要针对嵌套if while的exit块，
-                            // 也可以修改IR生成实现回填机制
-  static bool SysYAddReturn(Function *func, IRBuilder* pBuilder);     // 添加return指令(主要针对Void函数)
-  static bool SysYCondBr2Br(Function *func, IRBuilder* pBuilder);  // 条件分支(已知cond的值)转换为无条件分支
+  static bool SysYBlockMerge(Function *func);    // 合并基本块
+  static bool SysYAddReturn(Function *func, IRBuilder* pBuilder);     // 添加return指令
+  static bool SysYCondBr2Br(Function *func, IRBuilder* pBuilder);  // 条件分支转换为无条件分支
 };
 
-}  // namespace sysy
+// ======================================================================
+// 独立的CFG优化遍
+// ======================================================================
+
+class SysYDelInstAfterBrPass : public OptimizationPass {
+public:
+  static void *ID; // 唯一ID
+  SysYDelInstAfterBrPass() : OptimizationPass("SysYDelInstAfterBrPass", Granularity::Function) {}
+  bool runOnFunction(Function *F, AnalysisManager& AM) override;
+  void getAnalysisUsage(std::set<void *> &analysisDependencies, std::set<void *> &analysisInvalidations) const override {
+    // 这个优化可能改变CFG结构，使一些CFG相关的分析失效
+    // 可以在这里指定哪些分析会失效，例如支配树、活跃变量等
+    // analysisInvalidations.insert(DominatorTreeAnalysisPass::ID); // 示例
+  }
+  void *getPassID() const override { return &ID; }
+};
+
+class SysYDelEmptyBlockPass : public OptimizationPass {
+private:
+  IRBuilder *pBuilder;
+public:
+  static void *ID;
+  SysYDelEmptyBlockPass(IRBuilder *builder) : OptimizationPass("SysYDelEmptyBlockPass", Granularity::Function), pBuilder(builder) {}
+  bool runOnFunction(Function *F, AnalysisManager& AM) override;
+  void *getPassID() const override { return &ID; }
+};
+
+class SysYDelNoPreBLockPass : public OptimizationPass {
+public:
+  static void *ID;
+  SysYDelNoPreBLockPass() : OptimizationPass("SysYDelNoPreBLockPass", Granularity::Function) {}
+  bool runOnFunction(Function *F, AnalysisManager& AM) override;
+  void *getPassID() const override { return &ID; }
+};
+
+class SysYBlockMergePass : public OptimizationPass {
+public:
+  static void *ID;
+  SysYBlockMergePass() : OptimizationPass("SysYBlockMergePass", Granularity::Function) {}
+  bool runOnFunction(Function *F, AnalysisManager& AM) override;
+  void *getPassID() const override { return &ID; }
+};
+
+class SysYAddReturnPass : public OptimizationPass {
+private:
+  IRBuilder *pBuilder;
+public:
+  static void *ID;
+  SysYAddReturnPass(IRBuilder *builder) : OptimizationPass("SysYAddReturnPass", Granularity::Function), pBuilder(builder) {}
+  bool runOnFunction(Function *F, AnalysisManager& AM) override;
+  void *getPassID() const override { return &ID; }
+};
+
+class SysYCondBr2BrPass : public OptimizationPass {
+private:
+  IRBuilder *pBuilder;
+public:
+  static void *ID;
+  SysYCondBr2BrPass(IRBuilder *builder) : OptimizationPass("SysYCondBr2BrPass", Granularity::Function), pBuilder(builder) {}
+  bool runOnFunction(Function *F, AnalysisManager& AM) override;
+  void *getPassID() const override { return &ID; }
+};
+
+}  // namespace sysy