diff --git a/include/codegen/CodeGen.hpp b/include/codegen/CodeGen.hpp
index 8f74f80416ee5c9fdda3d058fdaa549774c40147..8680a7cecff17cec6861c66658640b63141d4f62 100755
--- a/include/codegen/CodeGen.hpp
+++ b/include/codegen/CodeGen.hpp
@@ -8,16 +8,13 @@
 class CodeGen {
   public:
     explicit CodeGen(Module *module) : m(module) {}
-    ~CodeGen(){
-        for(auto i : output) delete i;
-    }
 
     std::string print() const;
 
     void run();
 
     template <class... Args> void append_inst(Args... arg) {
-        output.emplace_back(new ASMInstruction(arg...));
+        output.emplace_back(arg...);
     }
 
     void
@@ -29,7 +26,7 @@ class CodeGen {
         }
         content.pop_back();
         content.pop_back();
-        output.emplace_back(new ASMInstruction(content, ty));
+        output.emplace_back(content, ty);
     }
 
   private:
@@ -101,5 +98,5 @@ class CodeGen {
     } context;
 
     Module *m;
-    std::list<ASMInstruction*> output;
+    std::list<ASMInstruction> output;
 };
diff --git a/src/codegen/CodeGen.cpp b/src/codegen/CodeGen.cpp
index e4815ae4a1e6912bfae4f901d89601c6289ffefb..1ac3cc678cec9c6cefb126c28f5b8be9372d7551 100755
--- a/src/codegen/CodeGen.cpp
+++ b/src/codegen/CodeGen.cpp
@@ -405,7 +405,7 @@ void CodeGen::run() {
     }
 
     // 函数代码段
-    output.emplace_back(new ASMInstruction(".text", ASMInstruction::Attribute));
+    output.emplace_back(".text", ASMInstruction::Attribute);
     for (auto func : m->get_functions()) {
         if (not func->is_declaration()) {
             // 更新 context
@@ -511,8 +511,8 @@ void CodeGen::run() {
 
 std::string CodeGen::print() const {
     std::string result;
-    for (const auto inst : output) {
-        result += inst->format();
+    for (const auto& inst : output) {
+        result += inst.format();
     }
     return result;
 }