diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
@@ -73,6 +73,11 @@
     return ST->useRVVForFixedLengthVectors() ? 16 : 0;
   }
 
+  InstructionCost getSpliceCost(VectorType *Tp, int Index);
+  InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Tp,
+                                 ArrayRef<int> Mask, int Index,
+                                 VectorType *SubTp);
+
   InstructionCost getGatherScatterOpCost(unsigned Opcode, Type *DataTy,
                                          const Value *Ptr, bool VariableMask,
                                          Align Alignment,
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -162,6 +162,24 @@
   llvm_unreachable("Unsupported register kind");
 }
 
+InstructionCost RISCVTTIImpl::getSpliceCost(VectorType *Tp, int Index) {
+  std::pair<InstructionCost, MVT> LT = TLI->getTypeLegalizationCost(DL, Tp);
+
+  unsigned Cost = 2; // vslidedown+vslideup.
+  // TODO: LMUL should increase cost.
+  // TODO: Multiplying by LT.first implies this legalizes into multiple copies
+  // of similar code, but I think we expand through memory.
+  return Cost * LT.first;
+}
+
+InstructionCost RISCVTTIImpl::getShuffleCost(TTI::ShuffleKind Kind,
+                                             VectorType *Tp, ArrayRef<int> Mask,
+                                             int Index, VectorType *SubTp) {
+  if (Kind == TTI::SK_Splice && isa<ScalableVectorType>(Tp))
+    return getSpliceCost(Tp, Index);
+  return BaseT::getShuffleCost(Kind, Tp, Mask, Index, SubTp);
+}
+
 InstructionCost RISCVTTIImpl::getGatherScatterOpCost(
     unsigned Opcode, Type *DataTy, const Value *Ptr, bool VariableMask,
     Align Alignment, TTI::TargetCostKind CostKind, const Instruction *I) {
diff --git a/llvm/test/Analysis/CostModel/RISCV/rvv-shuffle.ll b/llvm/test/Analysis/CostModel/RISCV/rvv-shuffle.ll
--- a/llvm/test/Analysis/CostModel/RISCV/rvv-shuffle.ll
+++ b/llvm/test/Analysis/CostModel/RISCV/rvv-shuffle.ll
@@ -106,20 +106,20 @@
 
 define void @vector_splice() {
 ; CHECK-LABEL: 'vector_splice'
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vector.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv32i8 = call <vscale x 32 x i8> @llvm.experimental.vector.splice.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv2i16 = call <vscale x 2 x i16> @llvm.experimental.vector.splice.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv4i16 = call <vscale x 4 x i16> @llvm.experimental.vector.splice.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv8i16 = call <vscale x 8 x i16> @llvm.experimental.vector.splice.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv16i16 = call <vscale x 16 x i16> @llvm.experimental.vector.splice.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv4i32 = call <vscale x 4 x i32> @llvm.experimental.vector.splice.nxv4i32(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv8i32 = call <vscale x 8 x i32> @llvm.experimental.vector.splice.nxv8i32(<vscale x 8 x i32> zeroinitializer, <vscale x 8 x i32> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv2i64 = call <vscale x 2 x i64> @llvm.experimental.vector.splice.nxv2i64(<vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv4i64 = call <vscale x 4 x i64> @llvm.experimental.vector.splice.nxv4i64(<vscale x 4 x i64> zeroinitializer, <vscale x 4 x i64> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv16i1 = call <vscale x 16 x i1> @llvm.experimental.vector.splice.nxv16i1(<vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv8i1 = call <vscale x 8 x i1> @llvm.experimental.vector.splice.nxv8i1(<vscale x 8 x i1> zeroinitializer, <vscale x 8 x i1> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv4i1 = call <vscale x 4 x i1> @llvm.experimental.vector.splice.nxv4i1(<vscale x 4 x i1> zeroinitializer, <vscale x 4 x i1> zeroinitializer, i32 1)
-; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %splice_nxv2i1 = call <vscale x 2 x i1> @llvm.experimental.vector.splice.nxv2i1(<vscale x 2 x i1> zeroinitializer, <vscale x 2 x i1> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vector.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv32i8 = call <vscale x 32 x i8> @llvm.experimental.vector.splice.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv2i16 = call <vscale x 2 x i16> @llvm.experimental.vector.splice.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i16 = call <vscale x 4 x i16> @llvm.experimental.vector.splice.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv8i16 = call <vscale x 8 x i16> @llvm.experimental.vector.splice.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv16i16 = call <vscale x 16 x i16> @llvm.experimental.vector.splice.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i32 = call <vscale x 4 x i32> @llvm.experimental.vector.splice.nxv4i32(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv8i32 = call <vscale x 8 x i32> @llvm.experimental.vector.splice.nxv8i32(<vscale x 8 x i32> zeroinitializer, <vscale x 8 x i32> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv2i64 = call <vscale x 2 x i64> @llvm.experimental.vector.splice.nxv2i64(<vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i64 = call <vscale x 4 x i64> @llvm.experimental.vector.splice.nxv4i64(<vscale x 4 x i64> zeroinitializer, <vscale x 4 x i64> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv16i1 = call <vscale x 16 x i1> @llvm.experimental.vector.splice.nxv16i1(<vscale x 16 x i1> zeroinitializer, <vscale x 16 x i1> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv8i1 = call <vscale x 8 x i1> @llvm.experimental.vector.splice.nxv8i1(<vscale x 8 x i1> zeroinitializer, <vscale x 8 x i1> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv4i1 = call <vscale x 4 x i1> @llvm.experimental.vector.splice.nxv4i1(<vscale x 4 x i1> zeroinitializer, <vscale x 4 x i1> zeroinitializer, i32 1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice_nxv2i1 = call <vscale x 2 x i1> @llvm.experimental.vector.splice.nxv2i1(<vscale x 2 x i1> zeroinitializer, <vscale x 2 x i1> zeroinitializer, i32 1)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
   %splice_nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vector.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 1)
diff --git a/llvm/test/Analysis/CostModel/RISCV/splice.ll b/llvm/test/Analysis/CostModel/RISCV/splice.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Analysis/CostModel/RISCV/splice.ll
@@ -0,0 +1,170 @@
+; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
+; RUN: opt < %s -analyze -cost-model -S -mtriple=riscv64 -mattr=+v,+f,+d,+zfh | FileCheck %s
+
+define void @vector_splice() {
+; CHECK-LABEL: 'vector_splice'
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv1i8 = call <vscale x 1 x i8> @llvm.experimental.vector.splice.nxv1i8(<vscale x 1 x i8> zeroinitializer, <vscale x 1 x i8> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv2i8 = call <vscale x 2 x i8> @llvm.experimental.vector.splice.nxv2i8(<vscale x 2 x i8> zeroinitializer, <vscale x 2 x i8> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv4i8 = call <vscale x 4 x i8> @llvm.experimental.vector.splice.nxv4i8(<vscale x 4 x i8> zeroinitializer, <vscale x 4 x i8> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv8i8 = call <vscale x 8 x i8> @llvm.experimental.vector.splice.nxv8i8(<vscale x 8 x i8> zeroinitializer, <vscale x 8 x i8> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vector.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv32i8 = call <vscale x 32 x i8> @llvm.experimental.vector.splice.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv64i8 = call <vscale x 64 x i8> @llvm.experimental.vector.splice.nxv64i8(<vscale x 64 x i8> zeroinitializer, <vscale x 64 x i8> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv1i16 = call <vscale x 1 x i16> @llvm.experimental.vector.splice.nxv1i16(<vscale x 1 x i16> zeroinitializer, <vscale x 1 x i16> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv2i16 = call <vscale x 2 x i16> @llvm.experimental.vector.splice.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv4i16 = call <vscale x 4 x i16> @llvm.experimental.vector.splice.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv8i16 = call <vscale x 8 x i16> @llvm.experimental.vector.splice.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv16i16 = call <vscale x 16 x i16> @llvm.experimental.vector.splice.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv32i16 = call <vscale x 32 x i16> @llvm.experimental.vector.splice.nxv32i16(<vscale x 32 x i16> zeroinitializer, <vscale x 32 x i16> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %splice.nxv64i16 = call <vscale x 64 x i16> @llvm.experimental.vector.splice.nxv64i16(<vscale x 64 x i16> zeroinitializer, <vscale x 64 x i16> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv1i32 = call <vscale x 1 x i32> @llvm.experimental.vector.splice.nxv1i32(<vscale x 1 x i32> zeroinitializer, <vscale x 1 x i32> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv2i32 = call <vscale x 2 x i32> @llvm.experimental.vector.splice.nxv2i32(<vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv4i32 = call <vscale x 4 x i32> @llvm.experimental.vector.splice.nxv4i32(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv8i32 = call <vscale x 8 x i32> @llvm.experimental.vector.splice.nxv8i32(<vscale x 8 x i32> zeroinitializer, <vscale x 8 x i32> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv16i32 = call <vscale x 16 x i32> @llvm.experimental.vector.splice.nxv16i32(<vscale x 16 x i32> zeroinitializer, <vscale x 16 x i32> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %splice.nxv32i32 = call <vscale x 32 x i32> @llvm.experimental.vector.splice.nxv32i32(<vscale x 32 x i32> zeroinitializer, <vscale x 32 x i32> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 8 for instruction: %splice.nxv64i32 = call <vscale x 64 x i32> @llvm.experimental.vector.splice.nxv64i32(<vscale x 64 x i32> zeroinitializer, <vscale x 64 x i32> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv1i64 = call <vscale x 1 x i64> @llvm.experimental.vector.splice.nxv1i64(<vscale x 1 x i64> zeroinitializer, <vscale x 1 x i64> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv2i64 = call <vscale x 2 x i64> @llvm.experimental.vector.splice.nxv2i64(<vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv4i64 = call <vscale x 4 x i64> @llvm.experimental.vector.splice.nxv4i64(<vscale x 4 x i64> zeroinitializer, <vscale x 4 x i64> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv8i64 = call <vscale x 8 x i64> @llvm.experimental.vector.splice.nxv8i64(<vscale x 8 x i64> zeroinitializer, <vscale x 8 x i64> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %splice.nxv16i64 = call <vscale x 16 x i64> @llvm.experimental.vector.splice.nxv16i64(<vscale x 16 x i64> zeroinitializer, <vscale x 16 x i64> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 8 for instruction: %splice.nxv32i64 = call <vscale x 32 x i64> @llvm.experimental.vector.splice.nxv32i64(<vscale x 32 x i64> zeroinitializer, <vscale x 32 x i64> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 16 for instruction: %splice.nxv64i64 = call <vscale x 64 x i64> @llvm.experimental.vector.splice.nxv64i64(<vscale x 64 x i64> zeroinitializer, <vscale x 64 x i64> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv1f16 = call <vscale x 1 x half> @llvm.experimental.vector.splice.nxv1f16(<vscale x 1 x half> zeroinitializer, <vscale x 1 x half> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv2f16 = call <vscale x 2 x half> @llvm.experimental.vector.splice.nxv2f16(<vscale x 2 x half> zeroinitializer, <vscale x 2 x half> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv4f16 = call <vscale x 4 x half> @llvm.experimental.vector.splice.nxv4f16(<vscale x 4 x half> zeroinitializer, <vscale x 4 x half> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv8f16 = call <vscale x 8 x half> @llvm.experimental.vector.splice.nxv8f16(<vscale x 8 x half> zeroinitializer, <vscale x 8 x half> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv16f16 = call <vscale x 16 x half> @llvm.experimental.vector.splice.nxv16f16(<vscale x 16 x half> zeroinitializer, <vscale x 16 x half> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv32f16 = call <vscale x 32 x half> @llvm.experimental.vector.splice.nxv32f16(<vscale x 32 x half> zeroinitializer, <vscale x 32 x half> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %splice.nxv64f16 = call <vscale x 64 x half> @llvm.experimental.vector.splice.nxv64f16(<vscale x 64 x half> zeroinitializer, <vscale x 64 x half> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv1f32 = call <vscale x 1 x float> @llvm.experimental.vector.splice.nxv1f32(<vscale x 1 x float> zeroinitializer, <vscale x 1 x float> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv2f32 = call <vscale x 2 x float> @llvm.experimental.vector.splice.nxv2f32(<vscale x 2 x float> zeroinitializer, <vscale x 2 x float> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv4f32 = call <vscale x 4 x float> @llvm.experimental.vector.splice.nxv4f32(<vscale x 4 x float> zeroinitializer, <vscale x 4 x float> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv8f32 = call <vscale x 8 x float> @llvm.experimental.vector.splice.nxv8f32(<vscale x 8 x float> zeroinitializer, <vscale x 8 x float> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv16f32 = call <vscale x 16 x float> @llvm.experimental.vector.splice.nxv16f32(<vscale x 16 x float> zeroinitializer, <vscale x 16 x float> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %splice.nxv32f32 = call <vscale x 32 x float> @llvm.experimental.vector.splice.nxv32f32(<vscale x 32 x float> zeroinitializer, <vscale x 32 x float> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 8 for instruction: %splice.nxv64f32 = call <vscale x 64 x float> @llvm.experimental.vector.splice.nxv64f32(<vscale x 64 x float> zeroinitializer, <vscale x 64 x float> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv1f64 = call <vscale x 1 x double> @llvm.experimental.vector.splice.nxv1f64(<vscale x 1 x double> zeroinitializer, <vscale x 1 x double> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv2f64 = call <vscale x 2 x double> @llvm.experimental.vector.splice.nxv2f64(<vscale x 2 x double> zeroinitializer, <vscale x 2 x double> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv4f64 = call <vscale x 4 x double> @llvm.experimental.vector.splice.nxv4f64(<vscale x 4 x double> zeroinitializer, <vscale x 4 x double> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %splice.nxv8f64 = call <vscale x 8 x double> @llvm.experimental.vector.splice.nxv8f64(<vscale x 8 x double> zeroinitializer, <vscale x 8 x double> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %splice.nxv16f64 = call <vscale x 16 x double> @llvm.experimental.vector.splice.nxv16f64(<vscale x 16 x double> zeroinitializer, <vscale x 16 x double> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 8 for instruction: %splice.nxv32f64 = call <vscale x 32 x double> @llvm.experimental.vector.splice.nxv32f64(<vscale x 32 x double> zeroinitializer, <vscale x 32 x double> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 16 for instruction: %splice.nxv64f64 = call <vscale x 64 x double> @llvm.experimental.vector.splice.nxv64f64(<vscale x 64 x double> zeroinitializer, <vscale x 64 x double> zeroinitializer, i32 -1)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
+;
+  %splice.nxv1i8 = call <vscale x 1 x i8> @llvm.experimental.vector.splice.nxv1i8(<vscale x 1 x i8> zeroinitializer, <vscale x 1 x i8> zeroinitializer, i32 -1)
+  %splice.nxv2i8 = call <vscale x 2 x i8> @llvm.experimental.vector.splice.nxv2i8(<vscale x 2 x i8> zeroinitializer, <vscale x 2 x i8> zeroinitializer, i32 -1)
+  %splice.nxv4i8 = call <vscale x 4 x i8> @llvm.experimental.vector.splice.nxv4i8(<vscale x 4 x i8> zeroinitializer, <vscale x 4 x i8> zeroinitializer, i32 -1)
+  %splice.nxv8i8 = call <vscale x 8 x i8> @llvm.experimental.vector.splice.nxv8i8(<vscale x 8 x i8> zeroinitializer, <vscale x 8 x i8> zeroinitializer, i32 -1)
+  %splice.nxv16i8 = call <vscale x 16 x i8> @llvm.experimental.vector.splice.nxv16i8(<vscale x 16 x i8> zeroinitializer, <vscale x 16 x i8> zeroinitializer, i32 -1)
+  %splice.nxv32i8 = call <vscale x 32 x i8> @llvm.experimental.vector.splice.nxv32i8(<vscale x 32 x i8> zeroinitializer, <vscale x 32 x i8> zeroinitializer, i32 -1)
+  %splice.nxv64i8 = call <vscale x 64 x i8> @llvm.experimental.vector.splice.nxv64i8(<vscale x 64 x i8> zeroinitializer, <vscale x 64 x i8> zeroinitializer, i32 -1)
+
+  %splice.nxv1i16 = call <vscale x 1 x i16> @llvm.experimental.vector.splice.nxv1i16(<vscale x 1 x i16> zeroinitializer, <vscale x 1 x i16> zeroinitializer, i32 -1)
+  %splice.nxv2i16 = call <vscale x 2 x i16> @llvm.experimental.vector.splice.nxv2i16(<vscale x 2 x i16> zeroinitializer, <vscale x 2 x i16> zeroinitializer, i32 -1)
+  %splice.nxv4i16 = call <vscale x 4 x i16> @llvm.experimental.vector.splice.nxv4i16(<vscale x 4 x i16> zeroinitializer, <vscale x 4 x i16> zeroinitializer, i32 -1)
+  %splice.nxv8i16 = call <vscale x 8 x i16> @llvm.experimental.vector.splice.nxv8i16(<vscale x 8 x i16> zeroinitializer, <vscale x 8 x i16> zeroinitializer, i32 -1)
+  %splice.nxv16i16 = call <vscale x 16 x i16> @llvm.experimental.vector.splice.nxv16i16(<vscale x 16 x i16> zeroinitializer, <vscale x 16 x i16> zeroinitializer, i32 -1)
+  %splice.nxv32i16 = call <vscale x 32 x i16> @llvm.experimental.vector.splice.nxv32i16(<vscale x 32 x i16> zeroinitializer, <vscale x 32 x i16> zeroinitializer, i32 -1)
+  %splice.nxv64i16 = call <vscale x 64 x i16> @llvm.experimental.vector.splice.nxv64i16(<vscale x 64 x i16> zeroinitializer, <vscale x 64 x i16> zeroinitializer, i32 -1)
+
+  %splice.nxv1i32 = call <vscale x 1 x i32> @llvm.experimental.vector.splice.nxv1i32(<vscale x 1 x i32> zeroinitializer, <vscale x 1 x i32> zeroinitializer, i32 -1)
+  %splice.nxv2i32 = call <vscale x 2 x i32> @llvm.experimental.vector.splice.nxv2i32(<vscale x 2 x i32> zeroinitializer, <vscale x 2 x i32> zeroinitializer, i32 -1)
+  %splice.nxv4i32 = call <vscale x 4 x i32> @llvm.experimental.vector.splice.nxv4i32(<vscale x 4 x i32> zeroinitializer, <vscale x 4 x i32> zeroinitializer, i32 -1)
+  %splice.nxv8i32 = call <vscale x 8 x i32> @llvm.experimental.vector.splice.nxv8i32(<vscale x 8 x i32> zeroinitializer, <vscale x 8 x i32> zeroinitializer, i32 -1)
+  %splice.nxv16i32 = call <vscale x 16 x i32> @llvm.experimental.vector.splice.nxv16i32(<vscale x 16 x i32> zeroinitializer, <vscale x 16 x i32> zeroinitializer, i32 -1)
+  %splice.nxv32i32 = call <vscale x 32 x i32> @llvm.experimental.vector.splice.nxv32i32(<vscale x 32 x i32> zeroinitializer, <vscale x 32 x i32> zeroinitializer, i32 -1)
+  %splice.nxv64i32 = call <vscale x 64 x i32> @llvm.experimental.vector.splice.nxv64i32(<vscale x 64 x i32> zeroinitializer, <vscale x 64 x i32> zeroinitializer, i32 -1)
+
+  %splice.nxv1i64 = call <vscale x 1 x i64> @llvm.experimental.vector.splice.nxv1i64(<vscale x 1 x i64> zeroinitializer, <vscale x 1 x i64> zeroinitializer, i32 -1)
+  %splice.nxv2i64 = call <vscale x 2 x i64> @llvm.experimental.vector.splice.nxv2i64(<vscale x 2 x i64> zeroinitializer, <vscale x 2 x i64> zeroinitializer, i32 -1)
+  %splice.nxv4i64 = call <vscale x 4 x i64> @llvm.experimental.vector.splice.nxv4i64(<vscale x 4 x i64> zeroinitializer, <vscale x 4 x i64> zeroinitializer, i32 -1)
+  %splice.nxv8i64 = call <vscale x 8 x i64> @llvm.experimental.vector.splice.nxv8i64(<vscale x 8 x i64> zeroinitializer, <vscale x 8 x i64> zeroinitializer, i32 -1)
+  %splice.nxv16i64 = call <vscale x 16 x i64> @llvm.experimental.vector.splice.nxv16i64(<vscale x 16 x i64> zeroinitializer, <vscale x 16 x i64> zeroinitializer, i32 -1)
+  %splice.nxv32i64 = call <vscale x 32 x i64> @llvm.experimental.vector.splice.nxv32i64(<vscale x 32 x i64> zeroinitializer, <vscale x 32 x i64> zeroinitializer, i32 -1)
+  %splice.nxv64i64 = call <vscale x 64 x i64> @llvm.experimental.vector.splice.nxv64i64(<vscale x 64 x i64> zeroinitializer, <vscale x 64 x i64> zeroinitializer, i32 -1)
+
+  %splice.nxv1f16 = call <vscale x 1 x half> @llvm.experimental.vector.splice.nxv1f16(<vscale x 1 x half> zeroinitializer, <vscale x 1 x half> zeroinitializer, i32 -1)
+  %splice.nxv2f16 = call <vscale x 2 x half> @llvm.experimental.vector.splice.nxv2f16(<vscale x 2 x half> zeroinitializer, <vscale x 2 x half> zeroinitializer, i32 -1)
+  %splice.nxv4f16 = call <vscale x 4 x half> @llvm.experimental.vector.splice.nxv4f16(<vscale x 4 x half> zeroinitializer, <vscale x 4 x half> zeroinitializer, i32 -1)
+  %splice.nxv8f16 = call <vscale x 8 x half> @llvm.experimental.vector.splice.nxv8f16(<vscale x 8 x half> zeroinitializer, <vscale x 8 x half> zeroinitializer, i32 -1)
+  %splice.nxv16f16 = call <vscale x 16 x half> @llvm.experimental.vector.splice.nxv16f16(<vscale x 16 x half> zeroinitializer, <vscale x 16 x half> zeroinitializer, i32 -1)
+  %splice.nxv32f16 = call <vscale x 32 x half> @llvm.experimental.vector.splice.nxv32f16(<vscale x 32 x half> zeroinitializer, <vscale x 32 x half> zeroinitializer, i32 -1)
+  %splice.nxv64f16 = call <vscale x 64 x half> @llvm.experimental.vector.splice.nxv64f16(<vscale x 64 x half> zeroinitializer, <vscale x 64 x half> zeroinitializer, i32 -1)
+
+  %splice.nxv1f32 = call <vscale x 1 x float> @llvm.experimental.vector.splice.nxv1f32(<vscale x 1 x float> zeroinitializer, <vscale x 1 x float> zeroinitializer, i32 -1)
+  %splice.nxv2f32 = call <vscale x 2 x float> @llvm.experimental.vector.splice.nxv2f32(<vscale x 2 x float> zeroinitializer, <vscale x 2 x float> zeroinitializer, i32 -1)
+  %splice.nxv4f32 = call <vscale x 4 x float> @llvm.experimental.vector.splice.nxv4f32(<vscale x 4 x float> zeroinitializer, <vscale x 4 x float> zeroinitializer, i32 -1)
+  %splice.nxv8f32 = call <vscale x 8 x float> @llvm.experimental.vector.splice.nxv8f32(<vscale x 8 x float> zeroinitializer, <vscale x 8 x float> zeroinitializer, i32 -1)
+  %splice.nxv16f32 = call <vscale x 16 x float> @llvm.experimental.vector.splice.nxv16f32(<vscale x 16 x float> zeroinitializer, <vscale x 16 x float> zeroinitializer, i32 -1)
+  %splice.nxv32f32 = call <vscale x 32 x float> @llvm.experimental.vector.splice.nxv32f32(<vscale x 32 x float> zeroinitializer, <vscale x 32 x float> zeroinitializer, i32 -1)
+  %splice.nxv64f32 = call <vscale x 64 x float> @llvm.experimental.vector.splice.nxv64f32(<vscale x 64 x float> zeroinitializer, <vscale x 64 x float> zeroinitializer, i32 -1)
+
+  %splice.nxv1f64 = call <vscale x 1 x double> @llvm.experimental.vector.splice.nxv1f64(<vscale x 1 x double> zeroinitializer, <vscale x 1 x double> zeroinitializer, i32 -1)
+  %splice.nxv2f64 = call <vscale x 2 x double> @llvm.experimental.vector.splice.nxv2f64(<vscale x 2 x double> zeroinitializer, <vscale x 2 x double> zeroinitializer, i32 -1)
+  %splice.nxv4f64 = call <vscale x 4 x double> @llvm.experimental.vector.splice.nxv4f64(<vscale x 4 x double> zeroinitializer, <vscale x 4 x double> zeroinitializer, i32 -1)
+  %splice.nxv8f64 = call <vscale x 8 x double> @llvm.experimental.vector.splice.nxv8f64(<vscale x 8 x double> zeroinitializer, <vscale x 8 x double> zeroinitializer, i32 -1)
+  %splice.nxv16f64 = call <vscale x 16 x double> @llvm.experimental.vector.splice.nxv16f64(<vscale x 16 x double> zeroinitializer, <vscale x 16 x double> zeroinitializer, i32 -1)
+  %splice.nxv32f64 = call <vscale x 32 x double> @llvm.experimental.vector.splice.nxv32f64(<vscale x 32 x double> zeroinitializer, <vscale x 32 x double> zeroinitializer, i32 -1)
+  %splice.nxv64f64 = call <vscale x 64 x double> @llvm.experimental.vector.splice.nxv64f64(<vscale x 64 x double> zeroinitializer, <vscale x 64 x double> zeroinitializer, i32 -1)
+
+  ret void
+}
+
+declare <vscale x 1 x i8> @llvm.experimental.vector.splice.nxv1i8(<vscale x 1 x i8>, <vscale x 1 x i8>, i32)
+declare <vscale x 2 x i8> @llvm.experimental.vector.splice.nxv2i8(<vscale x 2 x i8>, <vscale x 2 x i8>, i32)
+declare <vscale x 4 x i8> @llvm.experimental.vector.splice.nxv4i8(<vscale x 4 x i8>, <vscale x 4 x i8>, i32)
+declare <vscale x 8 x i8> @llvm.experimental.vector.splice.nxv8i8(<vscale x 8 x i8>, <vscale x 8 x i8>, i32)
+declare <vscale x 16 x i8> @llvm.experimental.vector.splice.nxv16i8(<vscale x 16 x i8>, <vscale x 16 x i8>, i32)
+declare <vscale x 32 x i8> @llvm.experimental.vector.splice.nxv32i8(<vscale x 32 x i8>, <vscale x 32 x i8>, i32)
+declare <vscale x 64 x i8> @llvm.experimental.vector.splice.nxv64i8(<vscale x 64 x i8>, <vscale x 64 x i8>, i32)
+
+declare <vscale x 1 x i16> @llvm.experimental.vector.splice.nxv1i16(<vscale x 1 x i16>, <vscale x 1 x i16>, i32)
+declare <vscale x 2 x i16> @llvm.experimental.vector.splice.nxv2i16(<vscale x 2 x i16>, <vscale x 2 x i16>, i32)
+declare <vscale x 4 x i16> @llvm.experimental.vector.splice.nxv4i16(<vscale x 4 x i16>, <vscale x 4 x i16>, i32)
+declare <vscale x 8 x i16> @llvm.experimental.vector.splice.nxv8i16(<vscale x 8 x i16>, <vscale x 8 x i16>, i32)
+declare <vscale x 16 x i16> @llvm.experimental.vector.splice.nxv16i16(<vscale x 16 x i16>, <vscale x 16 x i16>, i32)
+declare <vscale x 32 x i16> @llvm.experimental.vector.splice.nxv32i16(<vscale x 32 x i16>, <vscale x 32 x i16>, i32)
+declare <vscale x 64 x i16> @llvm.experimental.vector.splice.nxv64i16(<vscale x 64 x i16>, <vscale x 64 x i16>, i32)
+
+declare <vscale x 1 x i32> @llvm.experimental.vector.splice.nxv1i32(<vscale x 1 x i32>, <vscale x 1 x i32>, i32)
+declare <vscale x 2 x i32> @llvm.experimental.vector.splice.nxv2i32(<vscale x 2 x i32>, <vscale x 2 x i32>, i32)
+declare <vscale x 4 x i32> @llvm.experimental.vector.splice.nxv4i32(<vscale x 4 x i32>, <vscale x 4 x i32>, i32)
+declare <vscale x 8 x i32> @llvm.experimental.vector.splice.nxv8i32(<vscale x 8 x i32>, <vscale x 8 x i32>, i32)
+declare <vscale x 16 x i32> @llvm.experimental.vector.splice.nxv16i32(<vscale x 16 x i32>, <vscale x 16 x i32>, i32)
+declare <vscale x 32 x i32> @llvm.experimental.vector.splice.nxv32i32(<vscale x 32 x i32>, <vscale x 32 x i32>, i32)
+declare <vscale x 64 x i32> @llvm.experimental.vector.splice.nxv64i32(<vscale x 64 x i32>, <vscale x 64 x i32>, i32)
+
+declare <vscale x 1 x i64> @llvm.experimental.vector.splice.nxv1i64(<vscale x 1 x i64>, <vscale x 1 x i64>, i32)
+declare <vscale x 2 x i64> @llvm.experimental.vector.splice.nxv2i64(<vscale x 2 x i64>, <vscale x 2 x i64>, i32)
+declare <vscale x 4 x i64> @llvm.experimental.vector.splice.nxv4i64(<vscale x 4 x i64>, <vscale x 4 x i64>, i32)
+declare <vscale x 8 x i64> @llvm.experimental.vector.splice.nxv8i64(<vscale x 8 x i64>, <vscale x 8 x i64>, i32)
+declare <vscale x 16 x i64> @llvm.experimental.vector.splice.nxv16i64(<vscale x 16 x i64>, <vscale x 16 x i64>, i32)
+declare <vscale x 32 x i64> @llvm.experimental.vector.splice.nxv32i64(<vscale x 32 x i64>, <vscale x 32 x i64>, i32)
+declare <vscale x 64 x i64> @llvm.experimental.vector.splice.nxv64i64(<vscale x 64 x i64>, <vscale x 64 x i64>, i32)
+
+declare <vscale x 1 x half> @llvm.experimental.vector.splice.nxv1f16(<vscale x 1 x half>, <vscale x 1 x half>, i32)
+declare <vscale x 2 x half> @llvm.experimental.vector.splice.nxv2f16(<vscale x 2 x half>, <vscale x 2 x half>, i32)
+declare <vscale x 4 x half> @llvm.experimental.vector.splice.nxv4f16(<vscale x 4 x half>, <vscale x 4 x half>, i32)
+declare <vscale x 8 x half> @llvm.experimental.vector.splice.nxv8f16(<vscale x 8 x half>, <vscale x 8 x half>, i32)
+declare <vscale x 16 x half> @llvm.experimental.vector.splice.nxv16f16(<vscale x 16 x half>, <vscale x 16 x half>, i32)
+declare <vscale x 32 x half> @llvm.experimental.vector.splice.nxv32f16(<vscale x 32 x half>, <vscale x 32 x half>, i32)
+declare <vscale x 64 x half> @llvm.experimental.vector.splice.nxv64f16(<vscale x 64 x half>, <vscale x 64 x half>, i32)
+
+declare <vscale x 1 x float> @llvm.experimental.vector.splice.nxv1f32(<vscale x 1 x float>, <vscale x 1 x float>, i32)
+declare <vscale x 2 x float> @llvm.experimental.vector.splice.nxv2f32(<vscale x 2 x float>, <vscale x 2 x float>, i32)
+declare <vscale x 4 x float> @llvm.experimental.vector.splice.nxv4f32(<vscale x 4 x float>, <vscale x 4 x float>, i32)
+declare <vscale x 8 x float> @llvm.experimental.vector.splice.nxv8f32(<vscale x 8 x float>, <vscale x 8 x float>, i32)
+declare <vscale x 16 x float> @llvm.experimental.vector.splice.nxv16f32(<vscale x 16 x float>, <vscale x 16 x float>, i32)
+declare <vscale x 32 x float> @llvm.experimental.vector.splice.nxv32f32(<vscale x 32 x float>, <vscale x 32 x float>, i32)
+declare <vscale x 64 x float> @llvm.experimental.vector.splice.nxv64f32(<vscale x 64 x float>, <vscale x 64 x float>, i32)
+
+declare <vscale x 1 x double> @llvm.experimental.vector.splice.nxv1f64(<vscale x 1 x double>, <vscale x 1 x double>, i32)
+declare <vscale x 2 x double> @llvm.experimental.vector.splice.nxv2f64(<vscale x 2 x double>, <vscale x 2 x double>, i32)
+declare <vscale x 4 x double> @llvm.experimental.vector.splice.nxv4f64(<vscale x 4 x double>, <vscale x 4 x double>, i32)
+declare <vscale x 8 x double> @llvm.experimental.vector.splice.nxv8f64(<vscale x 8 x double>, <vscale x 8 x double>, i32)
+declare <vscale x 16 x double> @llvm.experimental.vector.splice.nxv16f64(<vscale x 16 x double>, <vscale x 16 x double>, i32)
+declare <vscale x 32 x double> @llvm.experimental.vector.splice.nxv32f64(<vscale x 32 x double>, <vscale x 32 x double>, i32)
+declare <vscale x 64 x double> @llvm.experimental.vector.splice.nxv64f64(<vscale x 64 x double>, <vscale x 64 x double>, i32)