diff --git a/src/mapleall/maple_me/src/irmap_emit.cpp b/src/mapleall/maple_me/src/irmap_emit.cpp
index cfbb04f203667d742ca609c6570829bcd9af5172..8b82ec408b1bfaab26fa8e9921e281798cfe5db4 100644
--- a/src/mapleall/maple_me/src/irmap_emit.cpp
+++ b/src/mapleall/maple_me/src/irmap_emit.cpp
@@ -572,12 +572,16 @@ StmtNode &AssertMeStmt::EmitStmt(SSATab &ssaTab) {
 }
 
 void BB::EmitBB(SSATab &ssaTab, BlockNode &curblk, bool needAnotherPass) {
+  StmtNode *bbFirstStmt = nullptr;
+  StmtNode *bbLastStmt = nullptr;
   // emit head. label
   LabelIdx labidx = GetBBLabel();
   if (labidx != 0) {
     LabelNode *lbnode = ssaTab.GetModule().CurFunction()->GetCodeMempool()->New<LabelNode>();
     lbnode->SetLabelIdx(labidx);
     curblk.AddStatement(lbnode);
+    bbFirstStmt = lbnode;
+    bbLastStmt = lbnode;
   }
   auto &meStmts = GetMeStmts();
   for (auto &meStmt : meStmts) {
@@ -588,16 +592,28 @@ void BB::EmitBB(SSATab &ssaTab, BlockNode &curblk, bool needAnotherPass) {
         meStmt.SetOp(OP_icallassigned);
       }
     }
-    StmtNode &stmt = meStmt.EmitStmt(ssaTab);
-    curblk.AddStatement(&stmt);
+    StmtNode *stmt = &meStmt.EmitStmt(ssaTab);
+    curblk.AddStatement(stmt);
+    if (bbFirstStmt == nullptr) {
+      bbFirstStmt = stmt;
+    }
+    bbLastStmt = stmt;
+
     if (&meStmt == &(meStmts.back())) {
-      ssaTab.GetModule().CurFunction()->SetFreqMap(stmt.GetStmtID(), GetFrequency());
+      ssaTab.GetModule().CurFunction()->SetFreqMap(stmt->GetStmtID(), GetFrequency());
     }
   }
   if (GetAttributes(kBBAttrIsTryEnd)) {
     // generate op_endtry
     StmtNode *endtry = ssaTab.GetModule().CurFunction()->GetCodeMempool()->New<StmtNode>(OP_endtry);
     curblk.AddStatement(endtry);
+    if (bbFirstStmt == nullptr) {
+      bbFirstStmt = endtry;
+    }
+    bbLastStmt = endtry;
   }
+  stmtNodeList.set_first(bbFirstStmt);
+  stmtNodeList.set_last(bbLastStmt);
 }
+
 }  // namespace maple
diff --git a/src/mapleall/maple_util/include/ptr_list_ref.h b/src/mapleall/maple_util/include/ptr_list_ref.h
index 9b5a68bb67dcead1b7d113f68f407581fc8bada9..c7791be6f1af6033962c238c02e7c1e4983a9a96 100644
--- a/src/mapleall/maple_util/include/ptr_list_ref.h
+++ b/src/mapleall/maple_util/include/ptr_list_ref.h
@@ -437,6 +437,14 @@ class PtrListRef {
     return this->erase(const_iterator(_Where));
   }
 
+  void set_first(T *f) {
+    this->first = f;
+  }
+
+  void set_last(T *f) {
+    this->last = f;
+  }
+
  private:
   T *first = nullptr;
   T *last = nullptr;