[RISCV] Combine (store/load interleave,deinterleave) into vsseg2/vlseg2

[luke]

Summary

Currently scalable and fixed stores are combined, but only loads of
scalable vectors are combined for now.

[craig.topper]

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

10913

How have we guaranteed the load has an MVT type?

10916

This isn't enough to guarantee the type is legal. DAG combine has to be very careful with types.

10922

I think we need to check isNormalLoad for the load to make sure it isn't an extending or indexed load. Probably a good idea to check isSimple too. Especially since you aren't checking that this is the only use of the load. Same applies for stores

[luke]

Address review comments

[luke]

Remove erroneous include

[craig.topper]

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

10874

I don't think check simple is enough. You need to check isTypeLegal.

[luke]

Check if type is legal

[luke]

Don't look up pseudos, use helper function to check if EMUL and EEW are valid

[luke]

Trying to do this as a combine is tricky, as we need to somehow combine it before the vector_interleave/vector_deinterleave ops are legalised, but after the types are legalised. I'm going to rework this to use the lowerInterleaveIntrinsicToStore/lowerDeinterleaveIntrinsicToLoad target lowering hooks introduced in D146218 instead.

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

 //===-- RISCVISelLowering.cpp - RISCV DAG Lowering Implementation  --------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 // This file defines the interfaces that RISCV uses to lower LLVM code into a
 // selection DAG.
 //
 //===----------------------------------------------------------------------===//
 
 #include "RISCVISelLowering.h"
 #include "MCTargetDesc/RISCVMatInt.h"
 #include "RISCV.h"
+#include "RISCVISelDAGToDAG.h"
 #include "RISCVMachineFunctionInfo.h"
 #include "RISCVRegisterInfo.h"
 #include "RISCVSubtarget.h"
 #include "RISCVTargetMachine.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Analysis/MemoryLocation.h"
+#include "llvm/Analysis/VectorUtils.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineJumpTableInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/IntrinsicsRISCV.h"
 #include "llvm/IR/PatternMatch.h"
 #include "llvm/Support/CommandLine.h"
RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
   if (Subtarget.hasStdExtZfhOrZfhmin())
     setTargetDAGCombine(ISD::SIGN_EXTEND_INREG);
   if (Subtarget.hasStdExtF())
     setTargetDAGCombine({ISD::ZERO_EXTEND, ISD::FP_TO_SINT, ISD::FP_TO_UINT,
                          ISD::FP_TO_SINT_SAT, ISD::FP_TO_UINT_SAT});
   if (Subtarget.hasVInstructions())
     setTargetDAGCombine({ISD::FCOPYSIGN, ISD::MGATHER, ISD::MSCATTER,
                          ISD::VP_GATHER, ISD::VP_SCATTER, ISD::SRA, ISD::SRL,
-                         ISD::SHL, ISD::STORE, ISD::SPLAT_VECTOR});
+                         ISD::SHL, ISD::STORE, ISD::SPLAT_VECTOR,
+                         ISD::VECTOR_DEINTERLEAVE});
   if (Subtarget.useRVVForFixedLengthVectors())
     setTargetDAGCombine(ISD::BITCAST);
 
   setLibcallName(RTLIB::FPEXT_F16_F32, "__extendhfsf2");
   setLibcallName(RTLIB::FPROUND_F32_F16, "__truncsfhf2");
 }
 
 EVT RISCVTargetLowering::getSetCCResultType(const DataLayout &DL,
static SDValue performSELECTCombine(SDNode *N, SelectionDAG &DAG,
 
   SDValue TrueVal = N->getOperand(1);
   SDValue FalseVal = N->getOperand(2);
   if (SDValue V = tryFoldSelectIntoOp(N, DAG, TrueVal, FalseVal, /*Swapped*/false))
     return V;
   return tryFoldSelectIntoOp(N, DAG, FalseVal, TrueVal, /*Swapped*/true);
 }
 
+static LoadSDNode *getLoadFromVectorDeinterleave(SDNode *N) {
+  SDValue L = N->getOperand(0), R = N->getOperand(1);
+  if (L->getOpcode() != ISD::EXTRACT_SUBVECTOR ||
+      R->getOpcode() != ISD::EXTRACT_SUBVECTOR)
+    return nullptr;
+  if (L->getOperand(0) != R->getOperand(0))
+    return nullptr;
+  auto *Load = dyn_cast<LoadSDNode>(L->getOperand(0));
+  if (!Load || !Load->isSimple())
+    return nullptr;
+  if (Load->getOpcode() != ISD::LOAD)
+    return nullptr;
+  if (L->getConstantOperandVal(1) != 0)
+    return nullptr;
+  if (R->getConstantOperandVal(1) !=
+      Load->getValueType(0).getVectorMinNumElements() / 2)
+    return nullptr;
+  return Load;
+}
+
+// Returns either a vector_interleave if operating on scalable vectors, or a
+// concat_vectors used in a vector_shuffle if operating on fixed vectors.
+static SDNode *getVectorInterleaveFromStore(StoreSDNode *N) {
+  SDValue Val = N->getValue();
+
+  if (auto *Shuffle = dyn_cast<ShuffleVectorSDNode>(Val)) {
+    // Shuffles are used on fixed nodes
+    auto Mask = createInterleaveMask(
+        Val.getValueType().getVectorMinNumElements() / 2, 2);
+    if (Mask == Shuffle->getMask() &&
+        Shuffle->getOperand(0).getOpcode() == ISD::CONCAT_VECTORS)
+      return Shuffle->getOperand(0).getNode();
+    return nullptr;
+  }
+
+  if (Val.getOpcode() != ISD::CONCAT_VECTORS)
+    return nullptr;
+  if (Val.getOperand(0).getNode() != Val.getOperand(1).getNode())
+    return nullptr;
+  if (Val.getOperand(0).getNode()->getOpcode() != ISD::VECTOR_INTERLEAVE)
+    return nullptr;
+  if (Val.getOperand(0).getResNo() != 0 || Val.getOperand(1).getResNo() != 1)
+    return nullptr;
+  return Val.getOperand(0).getNode();
+}
+
 SDValue RISCVTargetLowering::PerformDAGCombine(SDNode *N,
                                                DAGCombinerInfo &DCI) const {
   SelectionDAG &DAG = DCI.DAG;
 
   // Helper to call SimplifyDemandedBits on an operand of N where only some low
   // bits are demanded. N will be added to the Worklist if it was not deleted.
   // Caller should return SDValue(N, 0) if this returns true.
   auto SimplifyDemandedLowBitsHelper = [&](unsigned OpNo, unsigned LowBits) {
case RISCVISD::VFNMSUB_VL: {
 
     unsigned NewOpcode = negateFMAOpcode(N->getOpcode(), NegA != NegB, NegC);
     return DAG.getNode(NewOpcode, SDLoc(N), N->getValueType(0), A, B, C, Mask,
                        VL);
   }
   case ISD::STORE: {
     auto *Store = cast<StoreSDNode>(N);
     SDValue Val = Store->getValue();
+    SDLoc DL(N);
     // Combine store of vmv.x.s/vfmv.f.s to vse with VL of 1.
     // vfmv.f.s is represented as extract element from 0. Match it late to avoid
     // any illegal types.
     if (Val.getOpcode() == RISCVISD::VMV_X_S ||
         (DCI.isAfterLegalizeDAG() &&
          Val.getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
          isNullConstant(Val.getOperand(1)))) {
       SDValue Src = Val.getOperand(0);
       MVT VecVT = Src.getSimpleValueType();
       EVT MemVT = Store->getMemoryVT();
       // VecVT should be scalable and memory VT should match the element type.
-      if (VecVT.isScalableVector() &&
-          MemVT == VecVT.getVectorElementType()) {
-        SDLoc DL(N);
+      if (VecVT.isScalableVector() && MemVT == VecVT.getVectorElementType()) {
         MVT MaskVT = getMaskTypeFor(VecVT);
         return DAG.getStoreVP(
             Store->getChain(), DL, Src, Store->getBasePtr(), Store->getOffset(),
             DAG.getConstant(1, DL, MaskVT),
             DAG.getConstant(1, DL, Subtarget.getXLenVT()), MemVT,
             Store->getMemOperand(), Store->getAddressingMode(),
             Store->isTruncatingStore(), /*IsCompress*/ false);
       }
     }
+    // Combine interleaved store of vector_interleave or vector_shuffle into
+    // vsseg2
+    if (auto *Interleave = getVectorInterleaveFromStore(Store)) {
+      if (!Val.getValueType().isSimple())
+        break;
+      MVT VecVT = Val.getSimpleValueType();
+      if (!Store->isSimple() || !ISD::isNormalStore(Store))
+  break;
+
+      MVT ContainerVT = VecVT;
+      SDValue Op0 = Interleave->getOperand(0), Op1 = Interleave->getOperand(1);
+      if (VecVT.isFixedLengthVector()) {
+        ContainerVT = getContainerForFixedLengthVector(VecVT);
+        Op0 = convertToScalableVector(ContainerVT, Op0, DAG, Subtarget);
+        Op1 = convertToScalableVector(ContainerVT, Op1, DAG, Subtarget);
+      }
 
+      // Check that a VSSEG pseudo exists for VecVTs LMUL and SEW
+      unsigned Log2SEW = Log2_32(ContainerVT.getScalarSizeInBits());
+      RISCVII::VLMUL LMUL = RISCVTargetLowering::getLMUL(ContainerVT);
+      const RISCV::VSSEGPseudo *P =
+          RISCV::getVSSEGPseudo(2, /* IsMasked */ false, /*IsStrided */ false,
+                                Log2SEW, static_cast<unsigned>(LMUL));
+      if (!P)
+        break;
+      
+      auto [Mask, VL] = getDefaultVLOps(VecVT, ContainerVT, DL, DAG, Subtarget);
+      SDValue IntID = DAG.getTargetConstant(Intrinsic::riscv_vsseg2, DL,
+                                            Subtarget.getXLenVT());
+      SDValue Ops[] = {Store->getChain(),   IntID, Op0, Op1,
+                       Store->getBasePtr(), VL};
+      SDValue VSSeg2 = DAG.getMemIntrinsicNode(
+          ISD::INTRINSIC_VOID, DL, DAG.getVTList(MVT::Other), Ops,
+          Store->getMemoryVT(), Store->getMemOperand());
+      DAG.makeEquivalentMemoryOrdering(SDValue(Store, 0), VSSeg2);
+      return VSSeg2;
+    }
     break;
   }
+  case ISD::VECTOR_DEINTERLEAVE:
+    if (auto *Load = getLoadFromVectorDeinterleave(N)) {
+      SDLoc DL(Load);
+      EVT VecVT = Load->getValueType(0);
+      if (!VecVT.isSimple())
+        break;
+
+      assert(VecVT.isScalableVector());
+
+      // Check that a VLSEG pseudo exists for VecVTs LMUL and SEW
+      unsigned Log2SEW = Log2_32(VecVT.getScalarSizeInBits());
+      RISCVII::VLMUL LMUL = RISCVTargetLowering::getLMUL(VecVT.getSimpleVT());
+      const RISCV::VLSEGPseudo *P = RISCV::getVLSEGPseudo(
+          2, /* IsMasked */ false, /* IsTU */ false, /*IsStrided */ false,
+          /*FF*/ false, Log2SEW, static_cast<unsigned>(LMUL));
+      if (!P)
+        break;
+
+      SDValue VL = DAG.getRegister(RISCV::X0, Subtarget.getXLenVT());
+      SDValue IntID = DAG.getTargetConstant(Intrinsic::riscv_vlseg2, DL,
+                                            Subtarget.getXLenVT());
+      SDValue Passthru = DAG.getUNDEF(VecVT);
+      SDValue Ops[] = {Load->getChain(),   IntID, Passthru, Passthru,
+                       Load->getBasePtr(), VL};
+      EVT SubVecVT = N->getValueType(0);
+      SDValue VLSeg2 = DAG.getMemIntrinsicNode(
+          ISD::INTRINSIC_W_CHAIN, DL,
+          DAG.getVTList({SubVecVT, SubVecVT, MVT::Other}), Ops, VecVT,
+          Load->getMemOperand());
+      DAG.makeEquivalentMemoryOrdering(SDValue(Load, 1), VLSeg2.getValue(2));
+      return DAG.getMergeValues({VLSeg2.getValue(0), VLSeg2.getValue(1)}, DL);
+    }
+    break;
   case ISD::SPLAT_VECTOR: {
     EVT VT = N->getValueType(0);
     // Only perform this combine on legal MVT types.
     if (!isTypeLegal(VT))
       break;
     if (auto Gather = matchSplatAsGather(N->getOperand(0), VT.getSimpleVT(), N,
                                          DAG, Subtarget))
       return Gather;

llvm/test/CodeGen/RISCV/rvv/vector-deinterleave-combine-load.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=riscv32 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+; RUN: llc < %s -mtriple=riscv64 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+
+; Integers
+
+define {<vscale x 16 x i1>, <vscale x 16 x i1>} @vector_deinterleave_load_nxv16i1_nxv32i1(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv16i1_nxv32i1:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e8, m4, ta, ma
+; CHECK-NEXT:    vlm.v v8, (a0)
+; CHECK-NEXT:    csrr a0, vlenb
+; CHECK-NEXT:    srli a0, a0, 2
+; CHECK-NEXT:    vsetvli a1, zero, e8, mf2, ta, ma
+; CHECK-NEXT:    vslidedown.vx v0, v8, a0
+; CHECK-NEXT:    vsetvli a0, zero, e8, m2, ta, ma
+; CHECK-NEXT:    vmv.v.i v10, 0
+; CHECK-NEXT:    vmerge.vim v14, v10, 1, v0
+; CHECK-NEXT:    vmv1r.v v0, v8
+; CHECK-NEXT:    vmerge.vim v12, v10, 1, v0
+; CHECK-NEXT:    vnsrl.wi v8, v12, 0
+; CHECK-NEXT:    vmsne.vi v0, v8, 0
+; CHECK-NEXT:    vnsrl.wi v10, v12, 8
+; CHECK-NEXT:    vmsne.vi v8, v10, 0
+; CHECK-NEXT:    ret
+%vec = load <vscale x 32 x i1>, ptr %p
+%retval = call {<vscale x 16 x i1>, <vscale x 16 x i1>} @llvm.experimental.vector.deinterleave2.nxv32i1(<vscale x 32 x i1> %vec)
+ret {<vscale x 16 x i1>, <vscale x 16 x i1>} %retval
+}
+
+define {<vscale x 16 x i8>, <vscale x 16 x i8>} @vector_deinterleave_load_nxv16i8_nxv32i8(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv16i8_nxv32i8:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e8, m2, ta, ma
+; CHECK-NEXT:    vlseg2e8.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 32 x i8>, ptr %p
+%retval = call {<vscale x 16 x i8>, <vscale x 16 x i8>} @llvm.experimental.vector.deinterleave2.nxv32i8(<vscale x 32 x i8> %vec)
+ret {<vscale x 16 x i8>, <vscale x 16 x i8>} %retval
+}
+
+define {<vscale x 8 x i16>, <vscale x 8 x i16>} @vector_deinterleave_load_nxv8i16_nxv16i16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv8i16_nxv16i16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e16, m2, ta, ma
+; CHECK-NEXT:    vlseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 16 x i16>, ptr %p
+%retval = call {<vscale x 8 x i16>, <vscale x 8 x i16>} @llvm.experimental.vector.deinterleave2.nxv16i16(<vscale x 16 x i16> %vec)
+ret {<vscale x 8 x i16>, <vscale x 8 x i16>} %retval
+}
+
+define {<vscale x 4 x i32>, <vscale x 4 x i32>} @vector_deinterleave_load_nxv4i32_nxvv8i32(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv4i32_nxvv8i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vlseg2e32.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 8 x i32>, ptr %p
+%retval = call {<vscale x 4 x i32>, <vscale x 4 x i32>} @llvm.experimental.vector.deinterleave2.nxv8i32(<vscale x 8 x i32> %vec)
+ret {<vscale x 4 x i32>, <vscale x 4 x i32>} %retval
+}
+
+define {<vscale x 2 x i64>, <vscale x 2 x i64>} @vector_deinterleave_load_nxv2i64_nxv4i64(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv2i64_nxv4i64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e64, m2, ta, ma
+; CHECK-NEXT:    vlseg2e64.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 4 x i64>, ptr %p
+%retval = call {<vscale x 2 x i64>, <vscale x 2 x i64>} @llvm.experimental.vector.deinterleave2.nxv4i64(<vscale x 4 x i64> %vec)
+ret {<vscale x 2 x i64>, <vscale x 2 x i64>} %retval
+}
+
+declare {<vscale x 16 x i1>, <vscale x 16 x i1>} @llvm.experimental.vector.deinterleave2.nxv32i1(<vscale x 32 x i1>)
+declare {<vscale x 16 x i8>, <vscale x 16 x i8>} @llvm.experimental.vector.deinterleave2.nxv32i8(<vscale x 32 x i8>)
+declare {<vscale x 8 x i16>, <vscale x 8 x i16>} @llvm.experimental.vector.deinterleave2.nxv16i16(<vscale x 16 x i16>)
+declare {<vscale x 4 x i32>, <vscale x 4 x i32>} @llvm.experimental.vector.deinterleave2.nxv8i32(<vscale x 8 x i32>)
+declare {<vscale x 2 x i64>, <vscale x 2 x i64>} @llvm.experimental.vector.deinterleave2.nxv4i64(<vscale x 4 x i64>)
+
+; Floats
+
+define {<vscale x 2 x half>, <vscale x 2 x half>} @vector_deinterleave_load_nxv2f16_nxv4f16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv2f16_nxv4f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e16, mf2, ta, ma
+; CHECK-NEXT:    vlseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 4 x half>, ptr %p
+%retval = call {<vscale x 2 x half>, <vscale x 2 x half>} @llvm.experimental.vector.deinterleave2.nxv4f16(<vscale x 4 x half> %vec)
+ret {<vscale x 2 x half>, <vscale x 2 x half>} %retval
+}
+
+define {<vscale x 4 x half>, <vscale x 4 x half>} @vector_deinterleave_load_nxv4f16_nxv8f16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv4f16_nxv8f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e16, m1, ta, ma
+; CHECK-NEXT:    vlseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 8 x half>, ptr %p
+%retval = call {<vscale x 4 x half>, <vscale x 4 x half>} @llvm.experimental.vector.deinterleave2.nxv8f16(<vscale x 8 x half> %vec)
+ret {<vscale x 4 x half>, <vscale x 4 x half>} %retval
+}
+
+define {<vscale x 2 x float>, <vscale x 2 x float>} @vector_deinterleave_load_nxv2f32_nxv4f32(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv2f32_nxv4f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e32, m1, ta, ma
+; CHECK-NEXT:    vlseg2e32.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 4 x float>, ptr %p
+%retval = call {<vscale x 2 x float>, <vscale x 2 x float>} @llvm.experimental.vector.deinterleave2.nxv4f32(<vscale x 4 x float> %vec)
+ret {<vscale x 2 x float>, <vscale x 2 x float>} %retval
+}
+
+define {<vscale x 8 x half>, <vscale x 8 x half>} @vector_deinterleave_load_nxv8f16_nxv16f16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv8f16_nxv16f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e16, m2, ta, ma
+; CHECK-NEXT:    vlseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 16 x half>, ptr %p
+%retval = call {<vscale x 8 x half>, <vscale x 8 x half>} @llvm.experimental.vector.deinterleave2.nxv16f16(<vscale x 16 x half> %vec)
+ret {<vscale x 8 x half>, <vscale x 8 x half>} %retval
+}
+
+define {<vscale x 4 x float>, <vscale x 4 x float>} @vector_deinterleave_load_nxv4f32_nxv8f32(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv4f32_nxv8f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vlseg2e32.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 8 x float>, ptr %p
+%retval = call {<vscale x 4 x float>, <vscale x 4 x float>} @llvm.experimental.vector.deinterleave2.nxv8f32(<vscale x 8 x float> %vec)
+ret  {<vscale x 4 x float>, <vscale x 4 x float>} %retval
+}
+
+define {<vscale x 2 x double>, <vscale x 2 x double>} @vector_deinterleave_load_nxv2f64_nxv4f64(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_nxv2f64_nxv4f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetvli a1, zero, e64, m2, ta, ma
+; CHECK-NEXT:    vlseg2e64.v v8, (a0)
+; CHECK-NEXT:    ret
+%vec = load <vscale x 4 x double>, ptr %p
+%retval = call {<vscale x 2 x double>, <vscale x 2 x double>} @llvm.experimental.vector.deinterleave2.nxv4f64(<vscale x 4 x double> %vec)
+ret {<vscale x 2 x double>, <vscale x 2 x double>} %retval
+}
+
+declare {<vscale x 2 x half>,<vscale x 2 x half>} @llvm.experimental.vector.deinterleave2.nxv4f16(<vscale x 4 x half>)
+declare {<vscale x 4 x half>, <vscale x 4 x half>} @llvm.experimental.vector.deinterleave2.nxv8f16(<vscale x 8 x half>)
+declare {<vscale x 2 x float>, <vscale x 2 x float>} @llvm.experimental.vector.deinterleave2.nxv4f32(<vscale x 4 x float>)
+declare {<vscale x 8 x half>, <vscale x 8 x half>} @llvm.experimental.vector.deinterleave2.nxv16f16(<vscale x 16 x half>)
+declare {<vscale x 4 x float>, <vscale x 4 x float>} @llvm.experimental.vector.deinterleave2.nxv8f32(<vscale x 8 x float>)
+declare {<vscale x 2 x double>, <vscale x 2 x double>} @llvm.experimental.vector.deinterleave2.nxv4f64(<vscale x 4 x double>)

llvm/test/CodeGen/RISCV/rvv/vector-deinterleave-fixed-combine-load.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=riscv32 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+; RUN: llc < %s -mtriple=riscv64 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+
+; Integers
+
+define {<16 x i1>, <16 x i1>} @vector_deinterleave_load_v16i1_v32i1(ptr %p) {
+%vec = load <32 x i1>, ptr %p
+%retval = call {<16 x i1>, <16 x i1>} @llvm.experimental.vector.deinterleave2.v32i1(<32 x i1> %vec)
+ret {<16 x i1>, <16 x i1>} %retval
+}
+
+define {<16 x i8>, <16 x i8>} @vector_deinterleave_load_v16i8_v32i8(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v16i8_v32i8:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    li a1, 32
+; CHECK-NEXT:    vsetvli zero, a1, e8, m2, ta, ma
+; CHECK-NEXT:    vle8.v v10, (a0)
+; CHECK-NEXT:    vsetivli zero, 16, e8, m1, ta, ma
+; CHECK-NEXT:    vnsrl.wi v8, v10, 0
+; CHECK-NEXT:    vnsrl.wi v9, v10, 8
+; CHECK-NEXT:    ret
+%vec = load <32 x i8>, ptr %p
+%retval = call {<16 x i8>, <16 x i8>} @llvm.experimental.vector.deinterleave2.v32i8(<32 x i8> %vec)
+ret {<16 x i8>, <16 x i8>} %retval
+}
+
+define {<8 x i16>, <8 x i16>} @vector_deinterleave_load_v8i16_v16i16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v8i16_v16i16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 16, e16, m2, ta, ma
+; CHECK-NEXT:    vle16.v v10, (a0)
+; CHECK-NEXT:    vsetivli zero, 8, e16, m1, ta, ma
+; CHECK-NEXT:    vnsrl.wi v8, v10, 0
+; CHECK-NEXT:    vnsrl.wi v9, v10, 16
+; CHECK-NEXT:    ret
+%vec = load <16 x i16>, ptr %p
+%retval = call {<8 x i16>, <8 x i16>} @llvm.experimental.vector.deinterleave2.v16i16(<16 x i16> %vec)
+ret {<8 x i16>, <8 x i16>} %retval
+}
+
+define {<4 x i32>, <4 x i32>} @vector_deinterleave_load_v4i32_vv8i32(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v4i32_vv8i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 8, e32, m2, ta, ma
+; CHECK-NEXT:    vle32.v v10, (a0)
+; CHECK-NEXT:    li a0, 32
+; CHECK-NEXT:    vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT:    vnsrl.wx v9, v10, a0
+; CHECK-NEXT:    vnsrl.wi v8, v10, 0
+; CHECK-NEXT:    ret
+%vec = load <8 x i32>, ptr %p
+%retval = call {<4 x i32>, <4 x i32>} @llvm.experimental.vector.deinterleave2.v8i32(<8 x i32> %vec)
+ret {<4 x i32>, <4 x i32>} %retval
+}
+
+define {<2 x i64>, <2 x i64>} @vector_deinterleave_load_v2i64_v4i64(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v2i64_v4i64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vle64.v v10, (a0)
+; CHECK-NEXT:    li a0, 2
+; CHECK-NEXT:    vmv.s.x v0, a0
+; CHECK-NEXT:    vsetivli zero, 2, e64, m2, ta, ma
+; CHECK-NEXT:    vslidedown.vi v12, v10, 2
+; CHECK-NEXT:    vsetivli zero, 2, e64, m1, ta, mu
+; CHECK-NEXT:    vrgather.vi v8, v10, 0
+; CHECK-NEXT:    vrgather.vi v8, v12, 0, v0.t
+; CHECK-NEXT:    vrgather.vi v9, v10, 1
+; CHECK-NEXT:    vrgather.vi v9, v12, 1, v0.t
+; CHECK-NEXT:    ret
+%vec = load <4 x i64>, ptr %p
+%retval = call {<2 x i64>, <2 x i64>} @llvm.experimental.vector.deinterleave2.v4i64(<4 x i64> %vec)
+ret {<2 x i64>, <2 x i64>} %retval
+}
+
+declare {<16 x i1>, <16 x i1>} @llvm.experimental.vector.deinterleave2.v32i1(<32 x i1>)
+declare {<16 x i8>, <16 x i8>} @llvm.experimental.vector.deinterleave2.v32i8(<32 x i8>)
+declare {<8 x i16>, <8 x i16>} @llvm.experimental.vector.deinterleave2.v16i16(<16 x i16>)
+declare {<4 x i32>, <4 x i32>} @llvm.experimental.vector.deinterleave2.v8i32(<8 x i32>)
+declare {<2 x i64>, <2 x i64>} @llvm.experimental.vector.deinterleave2.v4i64(<4 x i64>)
+
+; Floats
+
+define {<2 x half>, <2 x half>} @vector_deinterleave_load_v2f16_v4f16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v2f16_v4f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 4, e16, mf2, ta, ma
+; CHECK-NEXT:    vle16.v v9, (a0)
+; CHECK-NEXT:    vsetivli zero, 2, e16, mf4, ta, ma
+; CHECK-NEXT:    vnsrl.wi v8, v9, 0
+; CHECK-NEXT:    vnsrl.wi v9, v9, 16
+; CHECK-NEXT:    ret
+%vec = load <4 x half>, ptr %p
+%retval = call {<2 x half>, <2 x half>} @llvm.experimental.vector.deinterleave2.v4f16(<4 x half> %vec)
+ret {<2 x half>, <2 x half>} %retval
+}
+
+define {<4 x half>, <4 x half>} @vector_deinterleave_load_v4f16_v8f16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v4f16_v8f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 8, e16, m1, ta, ma
+; CHECK-NEXT:    vle16.v v9, (a0)
+; CHECK-NEXT:    vsetivli zero, 4, e16, mf2, ta, ma
+; CHECK-NEXT:    vnsrl.wi v8, v9, 0
+; CHECK-NEXT:    vnsrl.wi v9, v9, 16
+; CHECK-NEXT:    ret
+%vec = load <8 x half>, ptr %p
+%retval = call {<4 x half>, <4 x half>} @llvm.experimental.vector.deinterleave2.v8f16(<8 x half> %vec)
+ret {<4 x half>, <4 x half>} %retval
+}
+
+define {<2 x float>, <2 x float>} @vector_deinterleave_load_v2f32_v4f32(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v2f32_v4f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT:    vle32.v v8, (a0)
+; CHECK-NEXT:    li a0, 32
+; CHECK-NEXT:    vsetivli zero, 2, e32, mf2, ta, ma
+; CHECK-NEXT:    vnsrl.wx v9, v8, a0
+; CHECK-NEXT:    vnsrl.wi v8, v8, 0
+; CHECK-NEXT:    ret
+%vec = load <4 x float>, ptr %p
+%retval = call {<2 x float>, <2 x float>} @llvm.experimental.vector.deinterleave2.v4f32(<4 x float> %vec)
+ret {<2 x float>, <2 x float>} %retval
+}
+
+define {<8 x half>, <8 x half>} @vector_deinterleave_load_v8f16_v16f16(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v8f16_v16f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 16, e16, m2, ta, ma
+; CHECK-NEXT:    vle16.v v10, (a0)
+; CHECK-NEXT:    vsetivli zero, 8, e16, m1, ta, ma
+; CHECK-NEXT:    vnsrl.wi v8, v10, 0
+; CHECK-NEXT:    vnsrl.wi v9, v10, 16
+; CHECK-NEXT:    ret
+%vec = load <16 x half>, ptr %p
+%retval = call {<8 x half>, <8 x half>} @llvm.experimental.vector.deinterleave2.v16f16(<16 x half> %vec)
+ret {<8 x half>, <8 x half>} %retval
+}
+
+define {<4 x float>, <4 x float>} @vector_deinterleave_load_v4f32_v8f32(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v4f32_v8f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 8, e32, m2, ta, ma
+; CHECK-NEXT:    vle32.v v10, (a0)
+; CHECK-NEXT:    li a0, 32
+; CHECK-NEXT:    vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT:    vnsrl.wx v9, v10, a0
+; CHECK-NEXT:    vnsrl.wi v8, v10, 0
+; CHECK-NEXT:    ret
+%vec = load <8 x float>, ptr %p
+%retval = call {<4 x float>, <4 x float>} @llvm.experimental.vector.deinterleave2.v8f32(<8 x float> %vec)
+ret  {<4 x float>, <4 x float>} %retval
+}
+
+define {<2 x double>, <2 x double>} @vector_deinterleave_load_v2f64_v4f64(ptr %p) {
+; CHECK-LABEL: vector_deinterleave_load_v2f64_v4f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vle64.v v10, (a0)
+; CHECK-NEXT:    li a0, 2
+; CHECK-NEXT:    vmv.s.x v0, a0
+; CHECK-NEXT:    vsetivli zero, 2, e64, m2, ta, ma
+; CHECK-NEXT:    vslidedown.vi v12, v10, 2
+; CHECK-NEXT:    vsetivli zero, 2, e64, m1, ta, mu
+; CHECK-NEXT:    vrgather.vi v8, v10, 0
+; CHECK-NEXT:    vrgather.vi v8, v12, 0, v0.t
+; CHECK-NEXT:    vrgather.vi v9, v10, 1
+; CHECK-NEXT:    vrgather.vi v9, v12, 1, v0.t
+; CHECK-NEXT:    ret
+%vec = load <4 x double>, ptr %p
+%retval = call {<2 x double>, <2 x double>} @llvm.experimental.vector.deinterleave2.v4f64(<4 x double> %vec)
+ret {<2 x double>, <2 x double>} %retval
+}
+
+declare {<2 x half>,<2 x half>} @llvm.experimental.vector.deinterleave2.v4f16(<4 x half>)
+declare {<4 x half>, <4 x half>} @llvm.experimental.vector.deinterleave2.v8f16(<8 x half>)
+declare {<2 x float>, <2 x float>} @llvm.experimental.vector.deinterleave2.v4f32(<4 x float>)
+declare {<8 x half>, <8 x half>} @llvm.experimental.vector.deinterleave2.v16f16(<16 x half>)
+declare {<4 x float>, <4 x float>} @llvm.experimental.vector.deinterleave2.v8f32(<8 x float>)
+declare {<2 x double>, <2 x double>} @llvm.experimental.vector.deinterleave2.v4f64(<4 x double>)

llvm/test/CodeGen/RISCV/rvv/vector-interleave-combine-store.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=riscv32 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+; RUN: llc < %s -mtriple=riscv64 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+
+; Integers
+
+define void @vector_interleave_store_nxv32i1_nxv16i1(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv32i1_nxv16i1:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmv1r.v v9, v0
+; CHECK-NEXT:    vsetvli a1, zero, e8, m2, ta, ma
+; CHECK-NEXT:    vmv.v.i v10, 0
+; CHECK-NEXT:    vmv1r.v v0, v8
+; CHECK-NEXT:    vmerge.vim v12, v10, 1, v0
+; CHECK-NEXT:    vmv1r.v v0, v9
+; CHECK-NEXT:    vmerge.vim v8, v10, 1, v0
+; CHECK-NEXT:    vwadd.vv v16, v8, v12
+; CHECK-NEXT:    li a1, -1
+; CHECK-NEXT:    vwmacc.vx v16, a1, v12
+; CHECK-NEXT:    vmsne.vi v8, v18, 0
+; CHECK-NEXT:    vmsne.vi v9, v16, 0
+; CHECK-NEXT:    csrr a1, vlenb
+; CHECK-NEXT:    srli a1, a1, 2
+; CHECK-NEXT:    add a2, a1, a1
+; CHECK-NEXT:    vsetvli zero, a2, e8, mf2, tu, ma
+; CHECK-NEXT:    vslideup.vx v9, v8, a1
+; CHECK-NEXT:    vsetvli a1, zero, e8, m4, ta, ma
+; CHECK-NEXT:    vsm.v v9, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 32 x i1> @llvm.experimental.vector.interleave2.nxv32i1(<vscale x 16 x i1> %a, <vscale x 16 x i1> %b)
+      store <vscale x 32 x i1> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv16i16_nxv8i16(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv16i16_nxv8i16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v10m2 killed $v10m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsetvli a1, zero, e16, m2, ta, ma
+; CHECK-NEXT:    # kill: def $v8m2 killed $v8m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 16 x i16> @llvm.experimental.vector.interleave2.nxv16i16(<vscale x 8 x i16> %a, <vscale x 8 x i16> %b)
+     store <vscale x 16 x i16> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv8i32_nxv4i32(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv8i32_nxv4i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v10m2 killed $v10m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsetvli a1, zero, e32, m2, ta, ma
+; CHECK-NEXT:    # kill: def $v8m2 killed $v8m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsseg2e32.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 8 x i32> @llvm.experimental.vector.interleave2.nxv8i32(<vscale x 4 x i32> %a, <vscale x 4 x i32> %b)
+     store <vscale x 8 x i32> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv4i64_nxv2i64(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv4i64_nxv2i64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v10m2 killed $v10m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsetvli a1, zero, e64, m2, ta, ma
+; CHECK-NEXT:    # kill: def $v8m2 killed $v8m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsseg2e64.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 4 x i64> @llvm.experimental.vector.interleave2.nxv4i64(<vscale x 2 x i64> %a, <vscale x 2 x i64> %b)
+     store <vscale x 4 x i64> %res, ptr %p
+     ret void
+}
+
+declare <vscale x 32 x i1> @llvm.experimental.vector.interleave2.nxv32i1(<vscale x 16 x i1>, <vscale x 16 x i1>)
+declare <vscale x 16 x i16> @llvm.experimental.vector.interleave2.nxv16i16(<vscale x 8 x i16>, <vscale x 8 x i16>)
+declare <vscale x 8 x i32> @llvm.experimental.vector.interleave2.nxv8i32(<vscale x 4 x i32>, <vscale x 4 x i32>)
+declare <vscale x 4 x i64> @llvm.experimental.vector.interleave2.nxv4i64(<vscale x 2 x i64>, <vscale x 2 x i64>)
+
+; Floats
+
+define void @vector_interleave_store_nxv4f16_nxv2f16(<vscale x 2 x half> %a, <vscale x 2 x half> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv4f16_nxv2f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v9 killed $v9 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsetvli a1, zero, e16, mf2, ta, ma
+; CHECK-NEXT:    # kill: def $v8 killed $v8 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 4 x half> @llvm.experimental.vector.interleave2.nxv4f16(<vscale x 2 x half> %a, <vscale x 2 x half> %b)
+     store <vscale x 4 x half> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv8f16_nxv4f16(<vscale x 4 x half> %a, <vscale x 4 x half> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv8f16_nxv4f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v9 killed $v9 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsetvli a1, zero, e16, m1, ta, ma
+; CHECK-NEXT:    # kill: def $v8 killed $v8 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 8 x half> @llvm.experimental.vector.interleave2.nxv8f16(<vscale x 4 x half> %a, <vscale x 4 x half> %b)
+     store <vscale x 8 x half> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv4f32_nxv2f32(<vscale x 2 x float> %a, <vscale x 2 x float> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv4f32_nxv2f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v9 killed $v9 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsetvli a1, zero, e32, m1, ta, ma
+; CHECK-NEXT:    # kill: def $v8 killed $v8 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsseg2e32.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 4 x float> @llvm.experimental.vector.interleave2.nxv4f32(<vscale x 2 x float> %a, <vscale x 2 x float> %b)
+     store <vscale x 4 x float> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv16f16_nxv8f16(<vscale x 8 x half> %a, <vscale x 8 x half> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv16f16_nxv8f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v10m2 killed $v10m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsetvli a1, zero, e16, m2, ta, ma
+; CHECK-NEXT:    # kill: def $v8m2 killed $v8m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 16 x half> @llvm.experimental.vector.interleave2.nxv16f16(<vscale x 8 x half> %a, <vscale x 8 x half> %b)
+     store <vscale x 16 x half> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv8f32_nxv4f32(<vscale x 4 x float> %a, <vscale x 4 x float> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv8f32_nxv4f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v10m2 killed $v10m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsetvli a1, zero, e32, m2, ta, ma
+; CHECK-NEXT:    # kill: def $v8m2 killed $v8m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsseg2e32.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 8 x float> @llvm.experimental.vector.interleave2.nxv8f32(<vscale x 4 x float> %a, <vscale x 4 x float> %b)
+     store <vscale x 8 x float> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_nxv4f64_nxv2f64(<vscale x 2 x double> %a, <vscale x 2 x double> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_nxv4f64_nxv2f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v10m2 killed $v10m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsetvli a1, zero, e64, m2, ta, ma
+; CHECK-NEXT:    # kill: def $v8m2 killed $v8m2 killed $v8m2_v10m2 def $v8m2_v10m2
+; CHECK-NEXT:    vsseg2e64.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <vscale x 4 x double> @llvm.experimental.vector.interleave2.nxv4f64(<vscale x 2 x double> %a, <vscale x 2 x double> %b)
+     store <vscale x 4 x double> %res, ptr %p
+     ret void
+}
+
+
+declare <vscale x 4 x half> @llvm.experimental.vector.interleave2.nxv4f16(<vscale x 2 x half>, <vscale x 2 x half>)
+declare <vscale x 8 x half> @llvm.experimental.vector.interleave2.nxv8f16(<vscale x 4 x half>, <vscale x 4 x half>)
+declare <vscale x 4 x float> @llvm.experimental.vector.interleave2.nxv4f32(<vscale x 2 x float>, <vscale x 2 x float>)
+declare <vscale x 16 x half> @llvm.experimental.vector.interleave2.nxv16f16(<vscale x 8 x half>, <vscale x 8 x half>)
+declare <vscale x 8 x float> @llvm.experimental.vector.interleave2.nxv8f32(<vscale x 4 x float>, <vscale x 4 x float>)
+declare <vscale x 4 x double> @llvm.experimental.vector.interleave2.nxv4f64(<vscale x 2 x double>, <vscale x 2 x double>)

llvm/test/CodeGen/RISCV/rvv/vector-interleave-fixed-combine-store.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=riscv32 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+; RUN: llc < %s -mtriple=riscv64 -mattr=+v,+zfh,+experimental-zvfh | FileCheck %s
+
+; Integers
+
+define void @vector_interleave_store_v32i1_v16i1(<16 x i1> %a, <16 x i1> %b, ptr %p) {
+     %res = call <32 x i1> @llvm.experimental.vector.interleave2.v32i1(<16 x i1> %a, <16 x i1> %b)
+      store <32 x i1> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v16i16_v8i16(<8 x i16> %a, <8 x i16> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v16i16_v8i16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmv1r.v v12, v9
+; CHECK-NEXT:    vsetivli zero, 16, e16, m2, ta, ma
+; CHECK-NEXT:    vmv1r.v v10, v8
+; CHECK-NEXT:    vsseg2e16.v v10, (a0)
+; CHECK-NEXT:    ret
+     %res = call <16 x i16> @llvm.experimental.vector.interleave2.v16i16(<8 x i16> %a, <8 x i16> %b)
+     store <16 x i16> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v8i32_v4i32(<4 x i32> %a, <4 x i32> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v8i32_v4i32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmv1r.v v12, v9
+; CHECK-NEXT:    vsetivli zero, 8, e32, m2, ta, ma
+; CHECK-NEXT:    vmv1r.v v10, v8
+; CHECK-NEXT:    vsseg2e32.v v10, (a0)
+; CHECK-NEXT:    ret
+     %res = call <8 x i32> @llvm.experimental.vector.interleave2.v8i32(<4 x i32> %a, <4 x i32> %b)
+     store <8 x i32> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v4i64_v2i64(<2 x i64> %a, <2 x i64> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v4i64_v2i64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmv1r.v v12, v9
+; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv1r.v v10, v8
+; CHECK-NEXT:    vsseg2e64.v v10, (a0)
+; CHECK-NEXT:    ret
+     %res = call <4 x i64> @llvm.experimental.vector.interleave2.v4i64(<2 x i64> %a, <2 x i64> %b)
+     store <4 x i64> %res, ptr %p
+     ret void
+}
+
+declare <32 x i1> @llvm.experimental.vector.interleave2.v32i1(<16 x i1>, <16 x i1>)
+declare <16 x i16> @llvm.experimental.vector.interleave2.v16i16(<8 x i16>, <8 x i16>)
+declare <8 x i32> @llvm.experimental.vector.interleave2.v8i32(<4 x i32>, <4 x i32>)
+declare <4 x i64> @llvm.experimental.vector.interleave2.v4i64(<2 x i64>, <2 x i64>)
+
+; Floats
+
+define void @vector_interleave_store_v4f16_v2f16(<2 x half> %a, <2 x half> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v4f16_v2f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v9 killed $v9 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsetivli zero, 4, e16, mf2, ta, ma
+; CHECK-NEXT:    # kill: def $v8 killed $v8 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <4 x half> @llvm.experimental.vector.interleave2.v4f16(<2 x half> %a, <2 x half> %b)
+     store <4 x half> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v8f16_v4f16(<4 x half> %a, <4 x half> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v8f16_v4f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v9 killed $v9 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsetivli zero, 8, e16, m1, ta, ma
+; CHECK-NEXT:    # kill: def $v8 killed $v8 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsseg2e16.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <8 x half> @llvm.experimental.vector.interleave2.v8f16(<4 x half> %a, <4 x half> %b)
+     store <8 x half> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v4f32_v2f32(<2 x float> %a, <2 x float> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v4f32_v2f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    # kill: def $v9 killed $v9 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsetivli zero, 4, e32, m1, ta, ma
+; CHECK-NEXT:    # kill: def $v8 killed $v8 killed $v8_v9 def $v8_v9
+; CHECK-NEXT:    vsseg2e32.v v8, (a0)
+; CHECK-NEXT:    ret
+     %res = call <4 x float> @llvm.experimental.vector.interleave2.v4f32(<2 x float> %a, <2 x float> %b)
+     store <4 x float> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v16f16_v8f16(<8 x half> %a, <8 x half> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v16f16_v8f16:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmv1r.v v12, v9
+; CHECK-NEXT:    vsetivli zero, 16, e16, m2, ta, ma
+; CHECK-NEXT:    vmv1r.v v10, v8
+; CHECK-NEXT:    vsseg2e16.v v10, (a0)
+; CHECK-NEXT:    ret
+     %res = call <16 x half> @llvm.experimental.vector.interleave2.v16f16(<8 x half> %a, <8 x half> %b)
+     store <16 x half> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v8f32_v4f32(<4 x float> %a, <4 x float> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v8f32_v4f32:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmv1r.v v12, v9
+; CHECK-NEXT:    vsetivli zero, 8, e32, m2, ta, ma
+; CHECK-NEXT:    vmv1r.v v10, v8
+; CHECK-NEXT:    vsseg2e32.v v10, (a0)
+; CHECK-NEXT:    ret
+     %res = call <8 x float> @llvm.experimental.vector.interleave2.v8f32(<4 x float> %a, <4 x float> %b)
+     store <8 x float> %res, ptr %p
+     ret void
+}
+
+define void @vector_interleave_store_v4f64_v2f64(<2 x double> %a, <2 x double> %b, ptr %p) {
+; CHECK-LABEL: vector_interleave_store_v4f64_v2f64:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    vmv1r.v v12, v9
+; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv1r.v v10, v8
+; CHECK-NEXT:    vsseg2e64.v v10, (a0)
+; CHECK-NEXT:    ret
+     %res = call <4 x double> @llvm.experimental.vector.interleave2.v4f64(<2 x double> %a, <2 x double> %b)
+     store <4 x double> %res, ptr %p
+     ret void
+}
+
+
+declare <4 x half> @llvm.experimental.vector.interleave2.v4f16(<2 x half>, <2 x half>)
+declare <8 x half> @llvm.experimental.vector.interleave2.v8f16(<4 x half>, <4 x half>)
+declare <4 x float> @llvm.experimental.vector.interleave2.v4f32(<2 x float>, <2 x float>)
+declare <16 x half> @llvm.experimental.vector.interleave2.v16f16(<8 x half>, <8 x half>)
+declare <8 x float> @llvm.experimental.vector.interleave2.v8f32(<4 x float>, <4 x float>)
+declare <4 x double> @llvm.experimental.vector.interleave2.v4f64(<2 x double>, <2 x double>)