diff --git a/src/backend/RISCv64/RISCv64Backend.cpp b/src/backend/RISCv64/RISCv64Backend.cpp
index f2b6562..6be37fc 100644
--- a/src/backend/RISCv64/RISCv64Backend.cpp
+++ b/src/backend/RISCv64/RISCv64Backend.cpp
@@ -208,12 +208,12 @@ std::string RISCv64CodeGen::function_gen(Function* func) {
     std::stringstream ss_after_isel;
     RISCv64AsmPrinter printer_isel(mfunc.get());
     printer_isel.run(ss_after_isel, true);
-
+    DEBUG = 1;
     if (DEBUG) {
         std::cerr << "====== Intermediate Representation after Instruction Selection ======\n" 
         << ss_after_isel.str();
     }
-
+    DEBUG = 0;
     // 阶段 2: 消除帧索引 (展开伪指令，计算局部变量偏移)
     EliminateFrameIndicesPass efi_pass;
     efi_pass.runOnMachineFunction(mfunc.get());
@@ -231,9 +231,9 @@ std::string RISCv64CodeGen::function_gen(Function* func) {
     DivStrengthReduction div_strength_reduction;
     div_strength_reduction.runOnMachineFunction(mfunc.get());
 
-    // 阶段 2.2: 指令调度 (Instruction Scheduling)
-    PreRA_Scheduler scheduler;
-    scheduler.runOnMachineFunction(mfunc.get());
+    // // 阶段 2.2: 指令调度 (Instruction Scheduling)
+    // PreRA_Scheduler scheduler;
+    // scheduler.runOnMachineFunction(mfunc.get());
 
     // 阶段 3: 物理寄存器分配 (Register Allocation)
     bool allocation_succeeded = false;
@@ -345,9 +345,9 @@ std::string RISCv64CodeGen::function_gen(Function* func) {
     PeepholeOptimizer peephole;
     peephole.runOnMachineFunction(mfunc.get());
 
-    // 阶段 5: 局部指令调度 (Local Scheduling)
-    PostRA_Scheduler local_scheduler;
-    local_scheduler.runOnMachineFunction(mfunc.get());
+    // // 阶段 5: 局部指令调度 (Local Scheduling)
+    // PostRA_Scheduler local_scheduler;
+    // local_scheduler.runOnMachineFunction(mfunc.get());
 
     // 阶段 3.2: 插入序言和尾声
     PrologueEpilogueInsertionPass pei_pass;
diff --git a/src/backend/RISCv64/RISCv64ISel.cpp b/src/backend/RISCv64/RISCv64ISel.cpp
index 176739b..a0ad2f1 100644
--- a/src/backend/RISCv64/RISCv64ISel.cpp
+++ b/src/backend/RISCv64/RISCv64ISel.cpp
@@ -526,6 +526,22 @@ void RISCv64ISel::selectNode(DAGNode* node) {
                     CurMBB->addInstruction(std::move(instr));
                     break;
                 }
+                case BinaryInst::kSll: { // 逻辑左移
+                    auto instr = std::make_unique<MachineInstr>(RVOpcodes::SLLW);
+                    instr->addOperand(std::make_unique<RegOperand>(dest_vreg));
+                    instr->addOperand(std::make_unique<RegOperand>(lhs_vreg));
+                    instr->addOperand(std::make_unique<RegOperand>(rhs_vreg));
+                    CurMBB->addInstruction(std::move(instr));
+                    break;
+                }
+                case BinaryInst::kSrl: { // 逻辑右移
+                    auto instr = std::make_unique<MachineInstr>(RVOpcodes::SRLW);
+                    instr->addOperand(std::make_unique<RegOperand>(dest_vreg));
+                    instr->addOperand(std::make_unique<RegOperand>(lhs_vreg));
+                    instr->addOperand(std::make_unique<RegOperand>(rhs_vreg));
+                    CurMBB->addInstruction(std::move(instr));
+                    break;
+                }
                 case BinaryInst::kICmpEQ: { // 等于 (a == b) -> (subw; seqz)
                     auto sub = std::make_unique<MachineInstr>(RVOpcodes::SUBW);
                     sub->addOperand(std::make_unique<RegOperand>(dest_vreg));
@@ -582,7 +598,7 @@ void RISCv64ISel::selectNode(DAGNode* node) {
                     CurMBB->addInstruction(std::move(xori));
                     break;
                 }
-                 case BinaryInst::kICmpGE: { // 大于等于 (a >= b) -> !(a < b) -> (slt; xori)
+                case BinaryInst::kICmpGE: { // 大于等于 (a >= b) -> !(a < b) -> (slt; xori)
                     auto slt = std::make_unique<MachineInstr>(RVOpcodes::SLT);
                     slt->addOperand(std::make_unique<RegOperand>(dest_vreg));
                     slt->addOperand(std::make_unique<RegOperand>(lhs_vreg));
diff --git a/src/midend/Pass/Pass.cpp b/src/midend/Pass/Pass.cpp
index aee29b0..b8c386d 100644
--- a/src/midend/Pass/Pass.cpp
+++ b/src/midend/Pass/Pass.cpp
@@ -192,9 +192,9 @@ void PassManager::runOptimizationPipeline(Module* moduleIR, IRBuilder* builderIR
         printPasses();
       }
 
-      // this->clearPasses();
-      // this->addPass(&Reg2Mem::ID);
-      // this->run();
+      this->clearPasses();
+      this->addPass(&Reg2Mem::ID);
+      this->run();
 
       if(DEBUG) {
         std::cout << "=== IR After Reg2Mem Optimizations ===\n";