diff --git a/src/backend/RISCv64/RISCv64ISel.cpp b/src/backend/RISCv64/RISCv64ISel.cpp
index 4758b37..a96b578 100644
--- a/src/backend/RISCv64/RISCv64ISel.cpp
+++ b/src/backend/RISCv64/RISCv64ISel.cpp
@@ -167,33 +167,6 @@ void RISCv64ISel::selectBasicBlock(BasicBlock* bb) {
             select_recursive(node_to_select);
         }
     }
-
-    if (CurMBB == MFunc->getBlocks().front().get()) { // 只对入口块操作
-        auto keepalive = std::make_unique<MachineInstr>(RVOpcodes::PSEUDO_KEEPALIVE);
-        for (Argument* arg : F->getArguments()) {
-            keepalive->addOperand(std::make_unique<RegOperand>(getVReg(arg)));
-        }
-
-        auto& instrs = CurMBB->getInstructions();
-        auto insert_pos = instrs.end();
-
-        // 关键：检查基本块是否以一个“终止指令”结尾
-        if (!instrs.empty()) {
-            RVOpcodes last_op = instrs.back()->getOpcode();
-            // 扩充了判断条件，涵盖所有可能的终止指令
-            if (last_op == RVOpcodes::J || last_op == RVOpcodes::RET ||
-                last_op == RVOpcodes::BEQ || last_op == RVOpcodes::BNE ||
-                last_op == RVOpcodes::BLT || last_op == RVOpcodes::BGE ||
-                last_op == RVOpcodes::BLTU || last_op == RVOpcodes::BGEU)
-            {
-                // 如果是，插入点就在这个终止指令之前
-                insert_pos = std::prev(instrs.end());
-            }
-        }
-        
-        // 在计算出的正确位置插入伪指令
-        instrs.insert(insert_pos, std::move(keepalive));
-    }
 }
 
 // 核心函数：为DAG节点选择并生成MachineInstr (已修复和增强的完整版本)