[midend-BuildCFG]新增BuildCFG优化通道，实现控制流图的构建与分析

src/midend/Pass/Pass.cpp

@@ -6,6 +6,7 @@
 #include "Mem2Reg.h"
 #include "Reg2Mem.h"
 #include "SCCP.h"
+#include "BuildCFG.h"
 #include "Pass.h"
 #include <iostream>
 #include <queue>
@@ -39,6 +40,7 @@ void PassManager::runOptimizationPipeline(Module* moduleIR, IRBuilder* builderIR
     registerAnalysisPass<sysy::LivenessAnalysisPass>();
 
     // 注册优化遍
+    registerOptimizationPass<BuildCFG>(builderIR);
     registerOptimizationPass<SysYDelInstAfterBrPass>();
     registerOptimizationPass<SysYDelNoPreBLockPass>();
     registerOptimizationPass<SysYBlockMergePass>();
@@ -58,6 +60,15 @@ void PassManager::runOptimizationPipeline(Module* moduleIR, IRBuilder* builderIR
       if (DEBUG) std::cout << "Applying -O1 optimizations.\n";
       if (DEBUG) std::cout << "--- Running custom optimization sequence ---\n";
 
+      if(DEBUG) {
+        std::cout << "=== IR Before CFGOpt Optimizations ===\n";
+        printPasses();
+      }
+
+      this->clearPasses();
+      this->addPass(&&BuildCFG::ID);
+      this->run();
+
       this->clearPasses(); 
       this->addPass(&SysYDelInstAfterBrPass::ID);
       this->addPass(&SysYDelNoPreBLockPass::ID);