diff --git a/src/mapleall/maple_me/src/lfo_loop_vec.cpp b/src/mapleall/maple_me/src/lfo_loop_vec.cpp
index 9e6c4d8a44f018fa9371e79e67b3c5782c640766..9015a5f359d72cb786136ba07f6c9505212d1435 100644
--- a/src/mapleall/maple_me/src/lfo_loop_vec.cpp
+++ b/src/mapleall/maple_me/src/lfo_loop_vec.cpp
@@ -1214,6 +1214,7 @@ void LoopVectorization::VectorizeExpr(BaseNode *node, LoopTransPlan *tp, MapleVe
     case OP_shl:
     case OP_lshr:
     case OP_ashr:
+    case OP_bxor:
     // compare
     case OP_eq:
     case OP_ne:
@@ -1628,6 +1629,7 @@ bool LoopVectorization::ExprVectorizable(DoloopInfo *doloopInfo, LoopVecInfo* ve
     case OP_mul:
     case OP_band:
     case OP_bior:
+    case OP_bxor:
     case OP_shl:
     case OP_lshr:
     case OP_ashr:
@@ -1674,6 +1676,10 @@ bool LoopVectorization::ExprVectorizable(DoloopInfo *doloopInfo, LoopVecInfo* ve
       }
       return ExprVectorizable(doloopInfo, vecInfo, x->Opnd(0));
     }
+    case OP_cvt: {
+      // skip cvt in array subscript
+      return isArraySub;
+    }
     case OP_iread: {
       IreadNode* ireadnode = static_cast<IreadNode *>(x);
       MIRType *mirType = ireadnode->GetType();
@@ -1690,6 +1696,9 @@ bool LoopVectorization::ExprVectorizable(DoloopInfo *doloopInfo, LoopVecInfo* ve
         }
         return false;
       }
+      if (isArraySub) {
+        return false; // iread is not constant value and used in array subscript
+      }
       bool canVec = ExprVectorizable(doloopInfo, vecInfo, x->Opnd(0));
       if (canVec) {
         if (!vecInfo->UpdateRHSTypeSize(mirType->GetPrimType()) ||