{RISCV] Backout cttz/ctlz instruction costs

Craig points out correctly in post-commit review that these depend on the availability of floating point extensions.

Author: preames

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp

@@ -438,68 +438,6 @@ static const CostTblEntry VectorIntrinsicCostTable[]{
    {Intrinsic::ctpop, MVT::nxv2i64, 21},
    {Intrinsic::ctpop, MVT::nxv4i64, 21},
    {Intrinsic::ctpop, MVT::nxv8i64, 21},
-   {Intrinsic::ctlz, MVT::v2i8, 10},
-   {Intrinsic::ctlz, MVT::v4i8, 10},
-   {Intrinsic::ctlz, MVT::v8i8, 10},
-   {Intrinsic::ctlz, MVT::v16i8, 10},
-   {Intrinsic::ctlz, MVT::nxv2i8, 10},
-   {Intrinsic::ctlz, MVT::nxv4i8, 10},
-   {Intrinsic::ctlz, MVT::nxv8i8, 10},
-   {Intrinsic::ctlz, MVT::nxv16i8, 10},
-   {Intrinsic::ctlz, MVT::v2i16, 7},
-   {Intrinsic::ctlz, MVT::v4i16, 7},
-   {Intrinsic::ctlz, MVT::v8i16, 7},
-   {Intrinsic::ctlz, MVT::v16i16, 7},
-   {Intrinsic::ctlz, MVT::nxv2i16, 7},
-   {Intrinsic::ctlz, MVT::nxv4i16, 7},
-   {Intrinsic::ctlz, MVT::nxv8i16, 7},
-   {Intrinsic::ctlz, MVT::nxv16i16, 7},
-   {Intrinsic::ctlz, MVT::v2i32, 8},
-   {Intrinsic::ctlz, MVT::v4i32, 8},
-   {Intrinsic::ctlz, MVT::v8i32, 8},
-   {Intrinsic::ctlz, MVT::v16i32, 8},
-   {Intrinsic::ctlz, MVT::nxv2i32, 11},
-   {Intrinsic::ctlz, MVT::nxv4i32, 11},
-   {Intrinsic::ctlz, MVT::nxv8i32, 11},
-   {Intrinsic::ctlz, MVT::nxv16i32, 31},
-   {Intrinsic::ctlz, MVT::v2i64, 35},
-   {Intrinsic::ctlz, MVT::v4i64, 35},
-   {Intrinsic::ctlz, MVT::v8i64, 35},
-   {Intrinsic::ctlz, MVT::v16i64, 35},
-   {Intrinsic::ctlz, MVT::nxv2i64, 35},
-   {Intrinsic::ctlz, MVT::nxv4i64, 35},
-   {Intrinsic::ctlz, MVT::nxv8i64, 35},
-   {Intrinsic::cttz, MVT::v2i8, 13},
-   {Intrinsic::cttz, MVT::v4i8, 13},
-   {Intrinsic::cttz, MVT::v8i8, 13},
-   {Intrinsic::cttz, MVT::v16i8, 13},
-   {Intrinsic::cttz, MVT::nxv2i8, 13},
-   {Intrinsic::cttz, MVT::nxv4i8, 13},
-   {Intrinsic::cttz, MVT::nxv8i8, 13},
-   {Intrinsic::cttz, MVT::nxv16i8, 13},
-   {Intrinsic::cttz, MVT::v2i16, 9},
-   {Intrinsic::cttz, MVT::v4i16, 9},
-   {Intrinsic::cttz, MVT::v8i16, 9},
-   {Intrinsic::cttz, MVT::v16i16, 9},
-   {Intrinsic::cttz, MVT::nxv2i16, 9},
-   {Intrinsic::cttz, MVT::nxv4i16, 9},
-   {Intrinsic::cttz, MVT::nxv8i16, 9},
-   {Intrinsic::cttz, MVT::nxv16i16, 9},
-   {Intrinsic::cttz, MVT::v2i32, 10},
-   {Intrinsic::cttz, MVT::v4i32, 10},
-   {Intrinsic::cttz, MVT::v8i32, 10},
-   {Intrinsic::cttz, MVT::v16i32, 10},
-   {Intrinsic::cttz, MVT::nxv2i32, 13},
-   {Intrinsic::cttz, MVT::nxv4i32, 13},
-   {Intrinsic::cttz, MVT::nxv8i32, 13},
-   {Intrinsic::cttz, MVT::nxv16i32, 24},
-   {Intrinsic::cttz, MVT::v2i64, 25},
-   {Intrinsic::cttz, MVT::v4i64, 25},
-   {Intrinsic::cttz, MVT::v8i64, 25},
-   {Intrinsic::cttz, MVT::v16i64, 25},
-   {Intrinsic::cttz, MVT::nxv2i64, 25},
-   {Intrinsic::cttz, MVT::nxv4i64, 25},
-   {Intrinsic::cttz, MVT::nxv8i64, 25},
 };
 
 InstructionCost