[RISCV][CostModel] add cost for cttz/ctlz under the non-zvbb

Author: LiqinWeng

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp

@@ -925,6 +925,14 @@ static const CostTblEntry VectorIntrinsicCostTable[]{
     {Intrinsic::ctpop, MVT::i16, 19},
     {Intrinsic::ctpop, MVT::i32, 20},
     {Intrinsic::ctpop, MVT::i64, 21},
+    {Intrinsic::ctlz, MVT::i8, 19},
+    {Intrinsic::ctlz, MVT::i16, 28},
+    {Intrinsic::ctlz, MVT::i32, 31},
+    {Intrinsic::ctlz, MVT::i64, 35},
+    {Intrinsic::cttz, MVT::i8, 16},
+    {Intrinsic::cttz, MVT::i16, 23},
+    {Intrinsic::cttz, MVT::i32, 24},
+    {Intrinsic::cttz, MVT::i64, 25},
     {Intrinsic::vp_ctpop, MVT::i8, 12},
     {Intrinsic::vp_ctpop, MVT::i16, 19},
     {Intrinsic::vp_ctpop, MVT::i32, 20},