[RISCV] Update cost of vector roundeven to match round which uses the same sequence but a different FRM value.

[eopXD]

Looks good to me too. Pardon me for missing this in my patch.

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp

static const CostTblEntry VectorIntrinsicCostTable[]{
     {Intrinsic::round, MVT::v2f64, 9},
     {Intrinsic::round, MVT::v4f64, 9},
     {Intrinsic::round, MVT::v8f64, 9},
     {Intrinsic::round, MVT::v16f64, 9},
     {Intrinsic::round, MVT::nxv1f64, 9},
     {Intrinsic::round, MVT::nxv2f64, 9},
     {Intrinsic::round, MVT::nxv4f64, 9},
     {Intrinsic::round, MVT::nxv8f64, 9},
+    {Intrinsic::roundeven, MVT::v2f32, 9},
+    {Intrinsic::roundeven, MVT::v4f32, 9},
+    {Intrinsic::roundeven, MVT::v8f32, 9},
+    {Intrinsic::roundeven, MVT::v16f32, 9},
+    {Intrinsic::roundeven, MVT::nxv2f32, 9},
+    {Intrinsic::roundeven, MVT::nxv4f32, 9},
+    {Intrinsic::roundeven, MVT::nxv8f32, 9},
+    {Intrinsic::roundeven, MVT::nxv16f32, 9},
+    {Intrinsic::roundeven, MVT::v2f64, 9},
+    {Intrinsic::roundeven, MVT::v4f64, 9},
+    {Intrinsic::roundeven, MVT::v8f64, 9},
+    {Intrinsic::roundeven, MVT::v16f64, 9},
+    {Intrinsic::roundeven, MVT::nxv1f64, 9},
+    {Intrinsic::roundeven, MVT::nxv2f64, 9},
+    {Intrinsic::roundeven, MVT::nxv4f64, 9},
+    {Intrinsic::roundeven, MVT::nxv8f64, 9},
     {Intrinsic::fabs, MVT::v2f32, 1},
     {Intrinsic::fabs, MVT::v4f32, 1},
     {Intrinsic::fabs, MVT::v8f32, 1},
     {Intrinsic::fabs, MVT::v16f32, 1},
     {Intrinsic::fabs, MVT::nxv2f32, 1},
     {Intrinsic::fabs, MVT::nxv4f32, 1},
     {Intrinsic::fabs, MVT::nxv8f32, 1},
     {Intrinsic::fabs, MVT::nxv16f32, 1},

llvm/test/Analysis/CostModel/RISCV/fround.ll

;
   call <vscale x 4 x double> @llvm.round.nvx5f64(<vscale x 4 x double> undef)
   call <vscale x 8 x double> @llvm.round.nvx8f64(<vscale x 8 x double> undef)
   ret void
 }
 
 define void @roundeven() {
 ; CHECK-LABEL: 'roundeven'
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 10 for instruction: %1 = call float @llvm.roundeven.f32(float undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %2 = call <2 x float> @llvm.roundeven.v2f32(<2 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %3 = call <4 x float> @llvm.roundeven.v4f32(<4 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %4 = call <8 x float> @llvm.roundeven.v8f32(<8 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %5 = call <16 x float> @llvm.roundeven.v16f32(<16 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %6 = call <vscale x 2 x float> @llvm.roundeven.nxv2f32(<vscale x 2 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %7 = call <vscale x 4 x float> @llvm.roundeven.nxv4f32(<vscale x 4 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %8 = call <vscale x 8 x float> @llvm.roundeven.nxv8f32(<vscale x 8 x float> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %9 = call <vscale x 16 x float> @llvm.roundeven.nxv16f32(<vscale x 16 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %2 = call <2 x float> @llvm.roundeven.v2f32(<2 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %3 = call <4 x float> @llvm.roundeven.v4f32(<4 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %4 = call <8 x float> @llvm.roundeven.v8f32(<8 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %5 = call <16 x float> @llvm.roundeven.v16f32(<16 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %6 = call <vscale x 2 x float> @llvm.roundeven.nxv2f32(<vscale x 2 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %7 = call <vscale x 4 x float> @llvm.roundeven.nxv4f32(<vscale x 4 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %8 = call <vscale x 8 x float> @llvm.roundeven.nxv8f32(<vscale x 8 x float> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %9 = call <vscale x 16 x float> @llvm.roundeven.nxv16f32(<vscale x 16 x float> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 10 for instruction: %10 = call double @llvm.roundeven.f64(double undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %11 = call <2 x double> @llvm.roundeven.v2f64(<2 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %12 = call <4 x double> @llvm.roundeven.v4f64(<4 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %13 = call <8 x double> @llvm.roundeven.v8f64(<8 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %14 = call <16 x double> @llvm.roundeven.v16f64(<16 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %15 = call <vscale x 1 x double> @llvm.roundeven.nxv1f64(<vscale x 1 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %16 = call <vscale x 2 x double> @llvm.roundeven.nxv2f64(<vscale x 2 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %17 = call <vscale x 4 x double> @llvm.roundeven.nxv4f64(<vscale x 4 x double> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %18 = call <vscale x 8 x double> @llvm.roundeven.nxv8f64(<vscale x 8 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %11 = call <2 x double> @llvm.roundeven.v2f64(<2 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %12 = call <4 x double> @llvm.roundeven.v4f64(<4 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %13 = call <8 x double> @llvm.roundeven.v8f64(<8 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %14 = call <16 x double> @llvm.roundeven.v16f64(<16 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %15 = call <vscale x 1 x double> @llvm.roundeven.nxv1f64(<vscale x 1 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %16 = call <vscale x 2 x double> @llvm.roundeven.nxv2f64(<vscale x 2 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %17 = call <vscale x 4 x double> @llvm.roundeven.nxv4f64(<vscale x 4 x double> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %18 = call <vscale x 8 x double> @llvm.roundeven.nxv8f64(<vscale x 8 x double> undef)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
   call float @llvm.roundeven.f32(float undef)
   call <2 x float> @llvm.roundeven.v2f32(<2 x float> undef)
   call <4 x float> @llvm.roundeven.v4f32(<4 x float> undef)
   call <8 x float> @llvm.roundeven.v8f32(<8 x float> undef)
   call <16 x float> @llvm.roundeven.v16f32(<16 x float> undef)
   call <vscale x 2 x float> @llvm.roundeven.nvx2f32(<vscale x 2 x float> undef)