diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.h b/llvm/lib/Target/AArch64/AArch64ISelLowering.h
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.h
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.h
@@ -948,6 +948,7 @@
   SDValue LowerToPredicatedOp(SDValue Op, SelectionDAG &DAG, unsigned NewOp,
                               bool OverrideNEON = false) const;
   SDValue LowerToScalableOp(SDValue Op, SelectionDAG &DAG) const;
+  SDValue LowerVECTOR_SPLICE(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerEXTRACT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerINSERT_SUBVECTOR(SDValue Op, SelectionDAG &DAG) const;
   SDValue LowerDIV(SDValue Op, SelectionDAG &DAG) const;
diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -895,6 +895,7 @@
   setTargetDAGCombine(ISD::ANY_EXTEND);
   setTargetDAGCombine(ISD::ZERO_EXTEND);
   setTargetDAGCombine(ISD::SIGN_EXTEND);
+  setTargetDAGCombine(ISD::VECTOR_SPLICE);
   setTargetDAGCombine(ISD::SIGN_EXTEND_INREG);
   setTargetDAGCombine(ISD::TRUNCATE);
   setTargetDAGCombine(ISD::CONCAT_VECTORS);
@@ -1159,6 +1160,7 @@
       setOperationAction(ISD::MULHS, VT, Custom);
       setOperationAction(ISD::MULHU, VT, Custom);
       setOperationAction(ISD::SPLAT_VECTOR, VT, Custom);
+      setOperationAction(ISD::VECTOR_SPLICE, VT, Custom);
       setOperationAction(ISD::SELECT, VT, Custom);
       setOperationAction(ISD::SETCC, VT, Custom);
       setOperationAction(ISD::SDIV, VT, Custom);
@@ -1282,6 +1284,7 @@
       setOperationAction(ISD::VECREDUCE_FMAX, VT, Custom);
       setOperationAction(ISD::VECREDUCE_FMIN, VT, Custom);
       setOperationAction(ISD::VECREDUCE_SEQ_FADD, VT, Custom);
+      setOperationAction(ISD::VECTOR_SPLICE, VT, Custom);
 
       setOperationAction(ISD::SELECT_CC, VT, Expand);
     }
@@ -1559,6 +1562,7 @@
   setOperationAction(ISD::SMAX, VT, Custom);
   setOperationAction(ISD::SMIN, VT, Custom);
   setOperationAction(ISD::SPLAT_VECTOR, VT, Custom);
+  setOperationAction(ISD::VECTOR_SPLICE, VT, Custom);
   setOperationAction(ISD::SRA, VT, Custom);
   setOperationAction(ISD::SRL, VT, Custom);
   setOperationAction(ISD::STORE, VT, Custom);
@@ -4911,6 +4915,8 @@
                                /*OverrideNEON=*/true);
   case ISD::CTTZ:
     return LowerCTTZ(Op, DAG);
+  case ISD::VECTOR_SPLICE:
+    return LowerVECTOR_SPLICE(Op, DAG);
   }
 }
 
@@ -7417,6 +7423,14 @@
   return CS1;
 }
 
+SDValue AArch64TargetLowering::LowerVECTOR_SPLICE(SDValue Op,
+                                                  SelectionDAG &DAG) const {
+
+  if (Op.getConstantOperandAPInt(2) == -1)
+    return Op;
+  return SDValue();
+}
+
 SDValue AArch64TargetLowering::LowerSELECT_CC(SDValue Op,
                                               SelectionDAG &DAG) const {
   ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
@@ -16487,6 +16501,28 @@
   return performPostLD1Combine(N, DCI, true);
 }
 
+SDValue performSVESpliceCombine(SDNode *N, SelectionDAG &DAG) {
+  EVT Ty = N->getValueType(0);
+  if (Ty.isInteger())
+    return SDValue();
+
+  EVT IntTy = Ty.changeVectorElementTypeToInteger();
+  EVT ExtIntTy = getPackedSVEVectorVT(IntTy.getVectorElementCount());
+  if (ExtIntTy.getVectorElementType().getScalarSizeInBits() <
+      IntTy.getVectorElementType().getScalarSizeInBits())
+    return SDValue();
+
+  SDLoc DL(N);
+  SDValue LHS = DAG.getAnyExtOrTrunc(DAG.getBitcast(IntTy, N->getOperand(0)),
+                                     DL, ExtIntTy);
+  SDValue RHS = DAG.getAnyExtOrTrunc(DAG.getBitcast(IntTy, N->getOperand(1)),
+                                     DL, ExtIntTy);
+  SDValue Idx = N->getOperand(2);
+  SDValue Splice = DAG.getNode(ISD::VECTOR_SPLICE, DL, ExtIntTy, LHS, RHS, Idx);
+  SDValue Trunc = DAG.getAnyExtOrTrunc(Splice, DL, IntTy);
+  return DAG.getBitcast(Ty, Trunc);
+}
+
 SDValue AArch64TargetLowering::PerformDAGCombine(SDNode *N,
                                                  DAGCombinerInfo &DCI) const {
   SelectionDAG &DAG = DCI.DAG;
@@ -16539,6 +16575,8 @@
     break;
   case ISD::STORE:
     return performSTORECombine(N, DCI, DAG, Subtarget);
+  case ISD::VECTOR_SPLICE:
+    return performSVESpliceCombine(N, DAG);
   case AArch64ISD::BRCOND:
     return performBRCONDCombine(N, DCI, DAG);
   case AArch64ISD::TBNZ:
diff --git a/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td b/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
--- a/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
@@ -1226,6 +1226,20 @@
   def : Pat<(nxv8bf16 (concat_vectors nxv4bf16:$v1, nxv4bf16:$v2)),
             (UZP1_ZZZ_H $v1, $v2)>;
 
+  // Splice with lane equal to -1
+  def : Pat<(nxv16i8 (vector_splice (nxv16i8 ZPR:$Z1), (nxv16i8 ZPR:$Z2), (i64 -1))),
+            (INSR_ZV_B ZPR:$Z2, (INSERT_SUBREG (IMPLICIT_DEF),
+            (LASTB_VPZ_B (PTRUE_B 31), ZPR:$Z1), bsub))>;
+  def : Pat<(nxv8i16 (vector_splice (nxv8i16 ZPR:$Z1), (nxv8i16 ZPR:$Z2), (i64 -1))),
+            (INSR_ZV_H ZPR:$Z2, (INSERT_SUBREG (IMPLICIT_DEF),
+            (LASTB_VPZ_H (PTRUE_H 31), ZPR:$Z1), hsub))>;
+  def : Pat<(nxv4i32 (vector_splice (nxv4i32 ZPR:$Z1), (nxv4i32 ZPR:$Z2), (i64 -1))),
+            (INSR_ZV_S ZPR:$Z2, (INSERT_SUBREG (IMPLICIT_DEF),
+            (LASTB_VPZ_S (PTRUE_S 31), ZPR:$Z1), ssub))>;
+  def : Pat<(nxv2i64 (vector_splice (nxv2i64 ZPR:$Z1), (nxv2i64 ZPR:$Z2), (i64 -1))),
+            (INSR_ZV_D ZPR:$Z2, (INSERT_SUBREG (IMPLICIT_DEF),
+            (LASTB_VPZ_D (PTRUE_D 31), ZPR:$Z1), dsub))>;
+
   defm CMPHS_PPzZZ : sve_int_cmp_0<0b000, "cmphs", SETUGE, SETULE>;
   defm CMPHI_PPzZZ : sve_int_cmp_0<0b001, "cmphi", SETUGT, SETULT>;
   defm CMPGE_PPzZZ : sve_int_cmp_0<0b100, "cmpge", SETGE, SETLE>;
diff --git a/llvm/test/CodeGen/AArch64/named-vector-shuffles-sve.ll b/llvm/test/CodeGen/AArch64/named-vector-shuffles-sve.ll
--- a/llvm/test/CodeGen/AArch64/named-vector-shuffles-sve.ll
+++ b/llvm/test/CodeGen/AArch64/named-vector-shuffles-sve.ll
@@ -239,6 +239,70 @@
   ret <vscale x 2 x i64> %res
 }
 
+define <vscale x 2 x half> @splice_nxv2f16_neg_idx(<vscale x 2 x half> %a, <vscale x 2 x half> %b) #0 {
+; CHECK-LABEL: splice_nxv2f16_neg_idx:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    lastb d0, p0, z0.d
+; CHECK-NEXT:    insr z1.d, d0
+; CHECK-NEXT:    mov z0.d, z1.d
+; CHECK-NEXT:    ret
+  %res = call <vscale x 2 x half> @llvm.experimental.vector.splice.nxv2f16(<vscale x 2 x half> %a, <vscale x 2 x half> %b, i32 -1)
+  ret <vscale x 2 x half> %res
+}
+
+define <vscale x 2 x half> @splice_nxv2f16_neg2_idx(<vscale x 2 x half> %a, <vscale x 2 x half> %b) #0 {
+; CHECK-LABEL: splice_nxv2f16_neg2_idx:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    addvl sp, sp, #-2
+; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    mov x8, sp
+; CHECK-NEXT:    ptrue p1.b
+; CHECK-NEXT:    st1h { z0.h }, p0, [sp]
+; CHECK-NEXT:    st1h { z1.h }, p0, [x8, #1, mul vl]
+; CHECK-NEXT:    addvl x8, x8, #1
+; CHECK-NEXT:    mov x9, #-16
+; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
+; CHECK-NEXT:    addvl sp, sp, #2
+; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  %res = call <vscale x 2 x half> @llvm.experimental.vector.splice.nxv2f16(<vscale x 2 x half> %a, <vscale x 2 x half> %b, i32 -2)
+  ret <vscale x 2 x half> %res
+}
+
+define <vscale x 4 x half> @splice_nxv4f16_neg_idx(<vscale x 4 x half> %a, <vscale x 4 x half> %b) #0 {
+; CHECK-LABEL: splice_nxv4f16_neg_idx:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    lastb s0, p0, z0.s
+; CHECK-NEXT:    insr z1.s, s0
+; CHECK-NEXT:    mov z0.d, z1.d
+; CHECK-NEXT:    ret
+  %res = call <vscale x 4 x half> @llvm.experimental.vector.splice.nxv4f16(<vscale x 4 x half> %a, <vscale x 4 x half> %b, i32 -1)
+  ret <vscale x 4 x half> %res
+}
+
+define <vscale x 4 x half> @splice_nxv4f16_neg3_idx(<vscale x 4 x half> %a, <vscale x 4 x half> %b) #0 {
+; CHECK-LABEL: splice_nxv4f16_neg3_idx:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    addvl sp, sp, #-2
+; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    mov x8, sp
+; CHECK-NEXT:    ptrue p1.b
+; CHECK-NEXT:    st1h { z0.h }, p0, [sp]
+; CHECK-NEXT:    st1h { z1.h }, p0, [x8, #1, mul vl]
+; CHECK-NEXT:    addvl x8, x8, #1
+; CHECK-NEXT:    mov x9, #-12
+; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
+; CHECK-NEXT:    addvl sp, sp, #2
+; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  %res = call <vscale x 4 x half> @llvm.experimental.vector.splice.nxv4f16(<vscale x 4 x half> %a, <vscale x 4 x half> %b, i32 -3)
+  ret <vscale x 4 x half> %res
+}
+
 define <vscale x 8 x half> @splice_nxv8f16_first_idx(<vscale x 8 x half> %a, <vscale x 8 x half> %b) #0 {
 ; CHECK-LABEL: splice_nxv8f16_first_idx:
 ; CHECK:       // %bb.0:
@@ -297,6 +361,38 @@
   ret <vscale x 8 x half> %res
 }
 
+define <vscale x 2 x float> @splice_nxv2f32_neg_idx(<vscale x 2 x float> %a, <vscale x 2 x float> %b) #0 {
+; CHECK-LABEL: splice_nxv2f32_neg_idx:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    lastb d0, p0, z0.d
+; CHECK-NEXT:    insr z1.d, d0
+; CHECK-NEXT:    mov z0.d, z1.d
+; CHECK-NEXT:    ret
+  %res = call <vscale x 2 x float> @llvm.experimental.vector.splice.nxv2f32(<vscale x 2 x float> %a, <vscale x 2 x float> %b, i32 -1)
+  ret <vscale x 2 x float> %res
+}
+
+define <vscale x 2 x float> @splice_nxv2f32_neg2_idx(<vscale x 2 x float> %a, <vscale x 2 x float> %b) #0 {
+; CHECK-LABEL: splice_nxv2f32_neg2_idx:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
+; CHECK-NEXT:    addvl sp, sp, #-2
+; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    mov x8, sp
+; CHECK-NEXT:    ptrue p1.b
+; CHECK-NEXT:    st1w { z0.s }, p0, [sp]
+; CHECK-NEXT:    st1w { z1.s }, p0, [x8, #1, mul vl]
+; CHECK-NEXT:    addvl x8, x8, #1
+; CHECK-NEXT:    mov x9, #-16
+; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
+; CHECK-NEXT:    addvl sp, sp, #2
+; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    ret
+  %res = call <vscale x 2 x float> @llvm.experimental.vector.splice.nxv2f32(<vscale x 2 x float> %a, <vscale x 2 x float> %b, i32 -2)
+  ret <vscale x 2 x float> %res
+}
+
 define <vscale x 4 x float> @splice_nxv4f32_first_idx(<vscale x 4 x float> %a, <vscale x 4 x float> %b) #0 {
 ; CHECK-LABEL: splice_nxv4f32_first_idx:
 ; CHECK:       // %bb.0:
@@ -605,17 +701,10 @@
 define <vscale x 16 x i8> @splice_nxv16i8_1(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b) #0 {
 ; CHECK-LABEL: splice_nxv16i8_1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    ptrue p0.b
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    st1b { z0.b }, p0, [sp]
-; CHECK-NEXT:    st1b { z1.b }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-1
-; CHECK-NEXT:    ld1b { z0.b }, p0/z, [x8, x9]
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    lastb b0, p0, z0.b
+; CHECK-NEXT:    insr z1.b, b0
+; CHECK-NEXT:    mov z0.d, z1.d
 ; CHECK-NEXT:    ret
   %res = call <vscale x 16 x i8> @llvm.experimental.vector.splice.nxv16i8(<vscale x 16 x i8> %a, <vscale x 16 x i8> %b, i32 -1)
   ret <vscale x 16 x i8> %res
@@ -668,18 +757,10 @@
 define <vscale x 8 x i16> @splice_nxv8i16_1(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b) #0 {
 ; CHECK-LABEL: splice_nxv8i16_1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    ptrue p0.h
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1h { z0.h }, p0, [sp]
-; CHECK-NEXT:    st1h { z1.h }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-2
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    lastb h0, p0, z0.h
+; CHECK-NEXT:    insr z1.h, h0
+; CHECK-NEXT:    mov z0.d, z1.d
 ; CHECK-NEXT:    ret
   %res = call <vscale x 8 x i16> @llvm.experimental.vector.splice.nxv8i16(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b, i32 -1)
   ret <vscale x 8 x i16> %res
@@ -732,18 +813,10 @@
 define <vscale x 4 x i32> @splice_nxv4i32_1(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b) #0 {
 ; CHECK-LABEL: splice_nxv4i32_1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    ptrue p0.s
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1w { z0.s }, p0, [sp]
-; CHECK-NEXT:    st1w { z1.s }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-4
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    lastb s0, p0, z0.s
+; CHECK-NEXT:    insr z1.s, s0
+; CHECK-NEXT:    mov z0.d, z1.d
 ; CHECK-NEXT:    ret
   %res = call <vscale x 4 x i32> @llvm.experimental.vector.splice.nxv4i32(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b, i32 -1)
   ret <vscale x 4 x i32> %res
@@ -796,18 +869,10 @@
 define <vscale x 2 x i64> @splice_nxv2i64_1(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b) #0 {
 ; CHECK-LABEL: splice_nxv2i64_1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    ptrue p0.d
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1d { z0.d }, p0, [sp]
-; CHECK-NEXT:    st1d { z1.d }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-8
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    lastb d0, p0, z0.d
+; CHECK-NEXT:    insr z1.d, d0
+; CHECK-NEXT:    mov z0.d, z1.d
 ; CHECK-NEXT:    ret
   %res = call <vscale x 2 x i64> @llvm.experimental.vector.splice.nxv2i64(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b, i32 -1)
   ret <vscale x 2 x i64> %res
@@ -860,18 +925,10 @@
 define <vscale x 8 x half> @splice_nxv8f16_1(<vscale x 8 x half> %a, <vscale x 8 x half> %b) #0 {
 ; CHECK-LABEL: splice_nxv8f16_1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    ptrue p0.h
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1h { z0.h }, p0, [sp]
-; CHECK-NEXT:    st1h { z1.h }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-2
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    lastb h0, p0, z0.h
+; CHECK-NEXT:    insr z1.h, h0
+; CHECK-NEXT:    mov z0.d, z1.d
 ; CHECK-NEXT:    ret
   %res = call <vscale x 8 x half> @llvm.experimental.vector.splice.nxv8f16(<vscale x 8 x half> %a, <vscale x 8 x half> %b, i32 -1)
   ret <vscale x 8 x half> %res
@@ -924,18 +981,10 @@
 define <vscale x 4 x float> @splice_nxv4f32_1(<vscale x 4 x float> %a, <vscale x 4 x float> %b) #0 {
 ; CHECK-LABEL: splice_nxv4f32_1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    ptrue p0.s
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1w { z0.s }, p0, [sp]
-; CHECK-NEXT:    st1w { z1.s }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-4
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    lastb s0, p0, z0.s
+; CHECK-NEXT:    insr z1.s, s0
+; CHECK-NEXT:    mov z0.d, z1.d
 ; CHECK-NEXT:    ret
   %res = call <vscale x 4 x float> @llvm.experimental.vector.splice.nxv4f32(<vscale x 4 x float> %a, <vscale x 4 x float> %b, i32 -1)
   ret <vscale x 4 x float> %res
@@ -988,18 +1037,10 @@
 define <vscale x 2 x double> @splice_nxv2f64_1(<vscale x 2 x double> %a, <vscale x 2 x double> %b) #0 {
 ; CHECK-LABEL: splice_nxv2f64_1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    ptrue p0.d
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1d { z0.d }, p0, [sp]
-; CHECK-NEXT:    st1d { z1.d }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-8
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    lastb d0, p0, z0.d
+; CHECK-NEXT:    insr z1.d, d0
+; CHECK-NEXT:    mov z0.d, z1.d
 ; CHECK-NEXT:    ret
   %res = call <vscale x 2 x double> @llvm.experimental.vector.splice.nxv2f64(<vscale x 2 x double> %a, <vscale x 2 x double> %b, i32 -1)
   ret <vscale x 2 x double> %res
@@ -1033,22 +1074,13 @@
 define <vscale x 2 x i1> @splice_nxv2i1(<vscale x 2 x i1> %a, <vscale x 2 x i1> %b) #0 {
 ; CHECK-LABEL: splice_nxv2i1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    mov z0.d, p0/z, #1 // =0x1
 ; CHECK-NEXT:    ptrue p0.d
+; CHECK-NEXT:    lastb d0, p0, z0.d
 ; CHECK-NEXT:    mov z1.d, p1/z, #1 // =0x1
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1d { z0.d }, p0, [sp]
-; CHECK-NEXT:    st1d { z1.d }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-8
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    and z0.d, z0.d, #0x1
-; CHECK-NEXT:    cmpne p0.d, p0/z, z0.d, #0
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    insr z1.d, d0
+; CHECK-NEXT:    and z1.d, z1.d, #0x1
+; CHECK-NEXT:    cmpne p0.d, p0/z, z1.d, #0
 ; CHECK-NEXT:    ret
   %res = call <vscale x 2 x i1> @llvm.experimental.vector.splice.nxv2i1(<vscale x 2 x i1> %a, <vscale x 2 x i1> %b, i32 -1)
   ret <vscale x 2 x i1> %res
@@ -1058,22 +1090,13 @@
 define <vscale x 4 x i1> @splice_nxv4i1(<vscale x 4 x i1> %a, <vscale x 4 x i1> %b) #0 {
 ; CHECK-LABEL: splice_nxv4i1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    mov z0.s, p0/z, #1 // =0x1
 ; CHECK-NEXT:    ptrue p0.s
+; CHECK-NEXT:    lastb s0, p0, z0.s
 ; CHECK-NEXT:    mov z1.s, p1/z, #1 // =0x1
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1w { z0.s }, p0, [sp]
-; CHECK-NEXT:    st1w { z1.s }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-4
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    and z0.s, z0.s, #0x1
-; CHECK-NEXT:    cmpne p0.s, p0/z, z0.s, #0
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    insr z1.s, s0
+; CHECK-NEXT:    and z1.s, z1.s, #0x1
+; CHECK-NEXT:    cmpne p0.s, p0/z, z1.s, #0
 ; CHECK-NEXT:    ret
   %res = call <vscale x 4 x i1> @llvm.experimental.vector.splice.nxv4i1(<vscale x 4 x i1> %a, <vscale x 4 x i1> %b, i32 -1)
   ret <vscale x 4 x i1> %res
@@ -1083,22 +1106,13 @@
 define <vscale x 8 x i1> @splice_nxv8i1(<vscale x 8 x i1> %a, <vscale x 8 x i1> %b) #0 {
 ; CHECK-LABEL: splice_nxv8i1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    mov z0.h, p0/z, #1 // =0x1
 ; CHECK-NEXT:    ptrue p0.h
+; CHECK-NEXT:    lastb h0, p0, z0.h
 ; CHECK-NEXT:    mov z1.h, p1/z, #1 // =0x1
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    ptrue p1.b
-; CHECK-NEXT:    st1h { z0.h }, p0, [sp]
-; CHECK-NEXT:    st1h { z1.h }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-2
-; CHECK-NEXT:    ld1b { z0.b }, p1/z, [x8, x9]
-; CHECK-NEXT:    and z0.h, z0.h, #0x1
-; CHECK-NEXT:    cmpne p0.h, p0/z, z0.h, #0
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    insr z1.h, h0
+; CHECK-NEXT:    and z1.h, z1.h, #0x1
+; CHECK-NEXT:    cmpne p0.h, p0/z, z1.h, #0
 ; CHECK-NEXT:    ret
   %res = call <vscale x 8 x i1> @llvm.experimental.vector.splice.nxv8i1(<vscale x 8 x i1> %a, <vscale x 8 x i1> %b, i32 -1)
   ret <vscale x 8 x i1> %res
@@ -1108,21 +1122,13 @@
 define <vscale x 16 x i1> @splice_nxv16i1(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b) #0 {
 ; CHECK-LABEL: splice_nxv16i1:
 ; CHECK:       // %bb.0:
-; CHECK-NEXT:    str x29, [sp, #-16]! // 8-byte Folded Spill
-; CHECK-NEXT:    addvl sp, sp, #-2
 ; CHECK-NEXT:    mov z0.b, p0/z, #1 // =0x1
 ; CHECK-NEXT:    ptrue p0.b
+; CHECK-NEXT:    lastb b0, p0, z0.b
 ; CHECK-NEXT:    mov z1.b, p1/z, #1 // =0x1
-; CHECK-NEXT:    mov x8, sp
-; CHECK-NEXT:    st1b { z0.b }, p0, [sp]
-; CHECK-NEXT:    st1b { z1.b }, p0, [x8, #1, mul vl]
-; CHECK-NEXT:    addvl x8, x8, #1
-; CHECK-NEXT:    mov x9, #-1
-; CHECK-NEXT:    ld1b { z0.b }, p0/z, [x8, x9]
-; CHECK-NEXT:    and z0.b, z0.b, #0x1
-; CHECK-NEXT:    cmpne p0.b, p0/z, z0.b, #0
-; CHECK-NEXT:    addvl sp, sp, #2
-; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
+; CHECK-NEXT:    insr z1.b, b0
+; CHECK-NEXT:    and z1.b, z1.b, #0x1
+; CHECK-NEXT:    cmpne p0.b, p0/z, z1.b, #0
 ; CHECK-NEXT:    ret
   %res = call <vscale x 16 x i1> @llvm.experimental.vector.splice.nxv16i1(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b, i32 -1)
   ret <vscale x 16 x i1> %res
@@ -1217,7 +1223,10 @@
 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 2 x i64> @llvm.experimental.vector.splice.nxv2i64(<vscale x 2 x i64>, <vscale x 2 x i64>, 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 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 16 x float> @llvm.experimental.vector.splice.nxv16f32(<vscale x 16 x float>, <vscale x 16 x float>, i32)
 declare <vscale x 2 x double> @llvm.experimental.vector.splice.nxv2f64(<vscale x 2 x double>, <vscale x 2 x double>, i32)