diff --git a/src/midend/Pass/Pass.cpp b/src/midend/Pass/Pass.cpp
index c2c8371..73a4573 100644
--- a/src/midend/Pass/Pass.cpp
+++ b/src/midend/Pass/Pass.cpp
@@ -79,6 +79,10 @@ void PassManager::runOptimizationPipeline(Module* moduleIR, IRBuilder* builderIR
       this->addPass(&SysYAddReturnPass::ID);
       this->run(); 
 
+      this->clearPasses();
+      this->addPass(&BuildCFG::ID);
+      this->run();
+
       if(DEBUG) {
         std::cout << "=== IR After CFGOpt Optimizations ===\n";
         printPasses();
@@ -119,7 +123,9 @@ void PassManager::runOptimizationPipeline(Module* moduleIR, IRBuilder* builderIR
         std::cout << "=== IR After Reg2Mem Optimizations ===\n";
         printPasses();
       }
-
+      this->clearPasses();
+      this->addPass(&BuildCFG::ID);
+      this->run();
       if (DEBUG) std::cout << "--- Custom optimization sequence finished ---\n";
     }
 
@@ -134,6 +140,7 @@ void PassManager::runOptimizationPipeline(Module* moduleIR, IRBuilder* builderIR
       SysYPrinter printer(moduleIR);
       printer.printIR();
     }
+    
 }
 
 void PassManager::clearPasses() {