[RISCV][InsertVSETVLI] Split out demanded property for zero/non-zero of VL

[reames]

Summary

The scalar move instructions (vmv.s.x, and fvmv.s.f) depend solely on whether the VL is 0 or non-zero. By tracking the fact we only demand the zeroness and not the whole VL value, we can allow changing VL over a scalar move. This helps to eliminate vsetvli toggles.

[craig.topper]

LGTM

llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp

if (!RISCVII::hasSEWOp(MI.getDesc().TSFlags))
     return false;
   const unsigned Log2SEW = MI.getOperand(getSEWOpNum(MI)).getImm();
   // A Log2SEW of 0 is an operation on mask registers only.
   return Log2SEW == 0;
 }
 
 /// Which subfields of VL or VTYPE have values we need to preserve?
 struct DemandedFields {
-  bool VL = false;
+  // Some unknown property of VL is used.  If demanded, must preserve entire
+  // value.
+  bool VLAny = false;
+  // Only zero vs non-zero is used. If demanded, can change non-zero values.
+  bool VLZeroness = false;
   bool SEW = false;
   bool LMUL = false;
   bool SEWLMULRatio = false;
   bool TailPolicy = false;
   bool MaskPolicy = false;
 
   // Return true if any part of VTYPE was used
   bool usedVTYPE() const {
     return SEW || LMUL || SEWLMULRatio || TailPolicy || MaskPolicy;
   }
 
+  // Return true if any property of VL was used
+  bool usedVL() {
+    return VLAny || VLZeroness;
+  }
+
   // Mark all VTYPE subfields and properties as demanded
   void demandVTYPE() {
     SEW = true;
     LMUL = true;
     SEWLMULRatio = true;
     TailPolicy = true;
     MaskPolicy = true;
   }
+
+  // Mark all VL properties as demanded
+  void demandVL() {
+    VLAny = true;
+    VLZeroness = true;
+  }
+
 };
 
 /// Return true if the two values of the VTYPE register provided are
 /// indistinguishable from the perspective of an instruction (or set of
 /// instructions) which use only the Used subfields and properties.
 static bool areCompatibleVTYPEs(uint64_t VType1,
                                 uint64_t VType2,
                                 const DemandedFields &Used) {
static DemandedFields getDemanded(const MachineInstr &MI) {
   // emitVSETVLIs) and pre-lowering forms.  The main implication of this is
   // that it can't use the value of a SEW, VL, or Policy operand as they might
   // be stale after lowering.
 
   // Most instructions don't use any of these subfeilds.
   DemandedFields Res;
   // Start conservative if registers are used
   if (MI.isCall() || MI.isInlineAsm() || MI.readsRegister(RISCV::VL))
-    Res.VL = true;
+    Res.demandVL();;
   if (MI.isCall() || MI.isInlineAsm() || MI.readsRegister(RISCV::VTYPE))
     Res.demandVTYPE();
   // Start conservative on the unlowered form too
   uint64_t TSFlags = MI.getDesc().TSFlags;
   if (RISCVII::hasSEWOp(TSFlags)) {
     Res.demandVTYPE();
     if (RISCVII::hasVLOp(TSFlags))
-      Res.VL = true;
+      Res.demandVL();
 
     // Behavior is independent of mask policy.
     if (!RISCVII::usesMaskPolicy(TSFlags))
       Res.MaskPolicy = false;
   }
 
   // Loads and stores with implicit EEW do not demand SEW or LMUL directly.
   // They instead demand the ratio of the two which is used in computing
if (isMaskRegOp(MI)) {
     Res.SEW = false;
     Res.LMUL = false;
   }
 
   // For vmv.s.x and vfmv.s.f, there is only two behaviors, VL = 0 and VL > 0.
   if (isScalarMoveInstr(MI)) {
     Res.LMUL = false;
     Res.SEWLMULRatio = false;
+    Res.VLAny = false;
   }
 
   return Res;
 }
 
 /// Defines the abstract state with which the forward dataflow models the
 /// values of the VL and VTYPE registers after insertion.
 class VSETVLIInfo {
if (SEWLMULRatioOnly)
       return false;
 
     // If the instruction doesn't need an AVLReg and the SEW matches, consider
     // it compatible.
     if (Require.hasAVLReg() && Require.AVLReg == RISCV::NoRegister)
       if (SEW == Require.SEW)
         return true;
 
-    if (Used.VL && !hasSameAVL(Require))
+    if (Used.VLAny && !hasSameAVL(Require))
+      return false;
+
+    if (Used.VLZeroness && !hasEquallyZeroAVL(Require))
       return false;
+
     return areCompatibleVTYPEs(encodeVTYPE(), Require.encodeVTYPE(), Used);
   }
 
   bool operator==(const VSETVLIInfo &Other) const {
     // Uninitialized is only equal to another Uninitialized.
     if (!isValid())
       return !Other.isValid();
     if (!Other.isValid())
bool RISCVInsertVSETVLI::needVSETVLI(const MachineInstr &MI,
                                      const VSETVLIInfo &CurInfo) const {
   assert(Require == computeInfoForInstr(MI, MI.getDesc().TSFlags, MRI));
 
   if (!CurInfo.isValid() || CurInfo.isUnknown() || CurInfo.hasSEWLMULRatioOnly())
     return true;
 
   DemandedFields Used = getDemanded(MI);
 
-  // For vmv.s.x and vfmv.s.f, there is only two behaviors, VL = 0 and VL > 0.
-  if (isScalarMoveInstr(MI) && CurInfo.hasEquallyZeroAVL(Require)) {
-    Used.VL = false;
-    // Additionally, if writing to an implicit_def operand, we don't need to
-    // preserve any other bits and are thus compatible with any larger etype,
-    // and can disregard policy bits.  Warning: It's tempting to try doing
+  if (isScalarMoveInstr(MI)) {
+    // For vmv.s.x and vfmv.s.f, if writing to an implicit_def operand, we don't
+    // need to preserve any other bits and are thus compatible with any larger,
+    // etype and can disregard policy bits.  Warning: It's tempting to try doing
     // this for any tail agnostic operation, but we can't as TA requires
     // tail lanes to either be the original value or -1.  We are writing
     // unknown bits to the lanes here.
     auto *VRegDef = MRI->getVRegDef(MI.getOperand(1).getReg());
     if (VRegDef && VRegDef->isImplicitDef() &&
         CurInfo.getSEW() >= Require.getSEW()) {
       Used.SEW = false;
       Used.TailPolicy = false;
void RISCVInsertVSETVLI::doPRE(MachineBasicBlock &MBB) {
   // or modify VL or VTYPE.  Also, fallthrough will return end().
   auto InsertPt = UnavailablePred->getFirstInstrTerminator();
   insertVSETVLI(*UnavailablePred, InsertPt,
                 UnavailablePred->findDebugLoc(InsertPt),
                 AvailableInfo, OldInfo);
 }
 
 static void doUnion(DemandedFields &A, DemandedFields B) {
-  A.VL |= B.VL;
+  A.VLAny |= B.VLAny;
+  A.VLZeroness |= B.VLZeroness;
   A.SEW |= B.SEW;
   A.LMUL |= B.LMUL;
   A.SEWLMULRatio |= B.SEWLMULRatio;
   A.TailPolicy |= B.TailPolicy;
   A.MaskPolicy |= B.MaskPolicy;
 }
 
+static bool isNonZeroAVL(const MachineOperand &MO) {
+  if (MO.isReg())
+    return RISCV::X0 == MO.getReg();
+  assert(MO.isImm());
+  return 0 != MO.getImm();
+}
+
 // Return true if we can mutate PrevMI to match MI without changing any the
 // fields which would be observed.
 static bool canMutatePriorConfig(const MachineInstr &PrevMI,
                                  const MachineInstr &MI,
                                  const DemandedFields &Used) {
   // If the VL values aren't equal, return false if either a) the former is
   // demanded, or b) we can't rewrite the former to be the later for
   // implementation reasons.
   if (!isVLPreservingConfig(MI)) {
-    if (Used.VL)
+    if (Used.VLAny)
       return false;
 
     // TODO: Requires more care in the mutation...
     if (isVLPreservingConfig(PrevMI))
       return false;
 
+    // We don't bother to handle the equally zero case here as it's largely
+    // uninteresting.
+    if (Used.VLZeroness &&
+        (!isNonZeroAVL(MI.getOperand(1)) ||
+         !isNonZeroAVL(PrevMI.getOperand(1))))
+      return false;
+
     // TODO: Track whether the register is defined between
     // PrevMI and MI.
     if (MI.getOperand(1).isReg() &&
         RISCV::X0 != MI.getOperand(1).getReg())
       return false;
 
     // TODO: We need to change the result register to allow this rewrite
     // without the result forming a vl preserving vsetvli which is not
static bool canMutatePriorConfig(const MachineInstr &PrevMI,
   return areCompatibleVTYPEs(PriorVType, VType, Used);
 }
 
 void RISCVInsertVSETVLI::doLocalPostpass(MachineBasicBlock &MBB) {
   MachineInstr *NextMI = nullptr;
   // We can have arbitrary code in successors, so VL and VTYPE
   // must be considered demanded.
   DemandedFields Used;
-  Used.VL = true;
+  Used.demandVL();
   Used.demandVTYPE();
   SmallVector<MachineInstr*> ToDelete;
   for (MachineInstr &MI : make_range(MBB.rbegin(), MBB.rend())) {
 
     if (!isVectorConfigInstr(MI)) {
       doUnion(Used, getDemanded(MI));
       continue;
     }
 
     Register VRegDef = MI.getOperand(0).getReg();
     if (VRegDef != RISCV::X0 &&
         !(VRegDef.isVirtual() && MRI->use_nodbg_empty(VRegDef)))
-      Used.VL = true;
+      Used.demandVL();
 
     if (NextMI) {
-      if (!Used.VL && !Used.usedVTYPE()) {
+      if (!Used.usedVL() && !Used.usedVTYPE()) {
         ToDelete.push_back(&MI);
         // Leave NextMI unchanged
         continue;
       } else if (canMutatePriorConfig(MI, *NextMI, Used)) {
         if (!isVLPreservingConfig(*NextMI)) {
           if (NextMI->getOperand(1).isImm())
             MI.getOperand(1).ChangeToImmediate(NextMI->getOperand(1).getImm());
           else

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-buildvec.ll

 }
 
 define void @buildvec_seq_v9i8(<9 x i8>* %x) {
 ; RV32-LABEL: buildvec_seq_v9i8:
 ; RV32:       # %bb.0:
 ; RV32-NEXT:    li a1, 3
 ; RV32-NEXT:    sb a1, 8(a0)
 ; RV32-NEXT:    li a1, 73
-; RV32-NEXT:    vsetivli zero, 1, e8, mf8, ta, ma
-; RV32-NEXT:    vmv.s.x v0, a1
 ; RV32-NEXT:    vsetivli zero, 8, e8, mf2, ta, ma
+; RV32-NEXT:    vmv.s.x v0, a1
 ; RV32-NEXT:    vmv.v.i v9, 2
 ; RV32-NEXT:    li a1, 36
 ; RV32-NEXT:    vmv.s.x v8, a1
 ; RV32-NEXT:    vmerge.vim v9, v9, 1, v0
 ; RV32-NEXT:    vmv1r.v v0, v8
 ; RV32-NEXT:    vmerge.vim v8, v9, 3, v0
 ; RV32-NEXT:    vse8.v v8, (a0)
 ; RV32-NEXT:    ret

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll

 ; RV32-NEXT:    vrgatherei16.vv v16, v8, v21
 ; RV32-NEXT:    vrgatherei16.vv v16, v12, v20, v0.t
 ; RV32-NEXT:    vmv.v.v v8, v16
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vrgather_shuffle_vv_v8i64:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    li a0, 5
-; RV64-NEXT:    vsetivli zero, 8, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v16, a0
 ; RV64-NEXT:    vsetivli zero, 8, e64, m4, ta, ma
+; RV64-NEXT:    vmv.s.x v16, a0
 ; RV64-NEXT:    vmv.v.i v20, 2
 ; RV64-NEXT:    vsetvli zero, zero, e64, m4, tu, ma
 ; RV64-NEXT:    vslideup.vi v20, v16, 7
 ; RV64-NEXT:    lui a0, %hi(.LCPI11_0)
 ; RV64-NEXT:    addi a0, a0, %lo(.LCPI11_0)
 ; RV64-NEXT:    vsetvli zero, zero, e64, m4, ta, mu
 ; RV64-NEXT:    vle64.v v24, (a0)
 ; RV64-NEXT:    li a0, 164
; CHECK-NEXT:    ret
   %shuff = shufflevector <8 x i8> %v, <8 x i8> poison, <8 x i32> <i32 4, i32 3, i32 4, i32 4, i32 4, i32 4, i32 4, i32 4>
   ret <8 x i8> %shuff
 }
 
 define <8 x i8> @splat_ve2_we0(<8 x i8> %v, <8 x i8> %w) {
 ; CHECK-LABEL: splat_ve2_we0:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    li a0, 66
-; CHECK-NEXT:    vsetivli zero, 1, e8, mf8, ta, ma
-; CHECK-NEXT:    vmv.s.x v0, a0
 ; CHECK-NEXT:    vsetivli zero, 8, e8, mf2, ta, mu
+; CHECK-NEXT:    vmv.s.x v0, a0
 ; CHECK-NEXT:    vrgather.vi v10, v8, 2
 ; CHECK-NEXT:    vrgather.vi v10, v9, 0, v0.t
 ; CHECK-NEXT:    vmv1r.v v8, v10
 ; CHECK-NEXT:    ret
   %shuff = shufflevector <8 x i8> %v, <8 x i8> %w, <8 x i32> <i32 2, i32 8, i32 2, i32 2, i32 2, i32 2, i32 8, i32 2>
   ret <8 x i8> %shuff
 }
 
; CHECK-NEXT:    ret
   %shuff = shufflevector <8 x i8> %v, <8 x i8> %w, <8 x i32> <i32 4, i32 8, i32 2, i32 2, i32 2, i32 2, i32 8, i32 2>
   ret <8 x i8> %shuff
 }
 
 define <8 x i8> @splat_ve2_we0_ins_i0we4(<8 x i8> %v, <8 x i8> %w) {
 ; CHECK-LABEL: splat_ve2_we0_ins_i0we4:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    li a0, 67
-; CHECK-NEXT:    vsetivli zero, 1, e8, mf8, ta, ma
-; CHECK-NEXT:    vmv.s.x v0, a0
 ; CHECK-NEXT:    vsetivli zero, 8, e8, mf2, ta, ma
+; CHECK-NEXT:    vmv.s.x v0, a0
 ; CHECK-NEXT:    vrgather.vi v10, v8, 2
 ; CHECK-NEXT:    vsetivli zero, 2, e32, mf2, ta, ma
 ; CHECK-NEXT:    vmv.v.i v8, 4
 ; CHECK-NEXT:    vsetivli zero, 8, e8, mf2, ta, mu
 ; CHECK-NEXT:    vrgather.vv v10, v9, v8, v0.t
 ; CHECK-NEXT:    vmv1r.v v8, v10
 ; CHECK-NEXT:    ret
   %shuff = shufflevector <8 x i8> %v, <8 x i8> %w, <8 x i32> <i32 12, i32 8, i32 2, i32 2, i32 2, i32 2, i32 8, i32 2>

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-mask-buildvec.ll

 ; ZVE32F-NEXT:    ret
   ret <4 x i1> <i1 0, i1 1, i1 1, i1 0>
 }
 
 define <4 x i1> @buildvec_mask_nonconst_v4i1(i1 %x, i1 %y) {
 ; CHECK-LABEL: buildvec_mask_nonconst_v4i1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    li a2, 3
-; CHECK-NEXT:    vsetivli zero, 1, e8, mf8, ta, ma
-; CHECK-NEXT:    vmv.s.x v0, a2
 ; CHECK-NEXT:    vsetivli zero, 4, e8, mf4, ta, ma
+; CHECK-NEXT:    vmv.s.x v0, a2
 ; CHECK-NEXT:    vmv.v.x v8, a1
 ; CHECK-NEXT:    vmerge.vxm v8, v8, a0, v0
 ; CHECK-NEXT:    vand.vi v8, v8, 1
 ; CHECK-NEXT:    vmsne.vi v0, v8, 0
 ; CHECK-NEXT:    ret
 ;
 ; ZVE32F-LABEL: buildvec_mask_nonconst_v4i1:
 ; ZVE32F:       # %bb.0:
 ; ZVE32F-NEXT:    li a2, 3
-; ZVE32F-NEXT:    vsetivli zero, 1, e8, mf4, ta, ma
-; ZVE32F-NEXT:    vmv.s.x v0, a2
 ; ZVE32F-NEXT:    vsetivli zero, 4, e8, mf4, ta, ma
+; ZVE32F-NEXT:    vmv.s.x v0, a2
 ; ZVE32F-NEXT:    vmv.v.x v8, a1
 ; ZVE32F-NEXT:    vmerge.vxm v8, v8, a0, v0
 ; ZVE32F-NEXT:    vand.vi v8, v8, 1
 ; ZVE32F-NEXT:    vmsne.vi v0, v8, 0
 ; ZVE32F-NEXT:    ret
   %1 = insertelement <4 x i1> poison, i1 %x, i32 0
   %2 = insertelement <4 x i1> %1,  i1 %x, i32 1
   %3 = insertelement <4 x i1> %2,  i1 %y, i32 2

 ; ZVE32F-NEXT:    ret
   ret <8 x i1> <i1 0, i1 1, i1 1, i1 0, i1 1, i1 1, i1 0, i1 1>
 }
 
 define <8 x i1> @buildvec_mask_nonconst_v8i1(i1 %x, i1 %y) {
 ; CHECK-LABEL: buildvec_mask_nonconst_v8i1:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    li a2, 19
-; CHECK-NEXT:    vsetivli zero, 1, e8, mf8, ta, ma
-; CHECK-NEXT:    vmv.s.x v0, a2
 ; CHECK-NEXT:    vsetivli zero, 8, e8, mf2, ta, ma
+; CHECK-NEXT:    vmv.s.x v0, a2
 ; CHECK-NEXT:    vmv.v.x v8, a1
 ; CHECK-NEXT:    vmerge.vxm v8, v8, a0, v0
 ; CHECK-NEXT:    vand.vi v8, v8, 1
 ; CHECK-NEXT:    vmsne.vi v0, v8, 0
 ; CHECK-NEXT:    ret
 ;
 ; ZVE32F-LABEL: buildvec_mask_nonconst_v8i1:
 ; ZVE32F:       # %bb.0:
 ; ZVE32F-NEXT:    li a2, 19
-; ZVE32F-NEXT:    vsetivli zero, 1, e8, mf4, ta, ma
-; ZVE32F-NEXT:    vmv.s.x v0, a2
 ; ZVE32F-NEXT:    vsetivli zero, 8, e8, mf2, ta, ma
+; ZVE32F-NEXT:    vmv.s.x v0, a2
 ; ZVE32F-NEXT:    vmv.v.x v8, a1
 ; ZVE32F-NEXT:    vmerge.vxm v8, v8, a0, v0
 ; ZVE32F-NEXT:    vand.vi v8, v8, 1
 ; ZVE32F-NEXT:    vmsne.vi v0, v8, 0
 ; ZVE32F-NEXT:    ret
   %1 = insertelement <8 x i1> poison, i1 %x, i32 0
   %2 = insertelement <8 x i1> %1,  i1 %x, i32 1
   %3 = insertelement <8 x i1> %2,  i1 %y, i32 2

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-fp.ll

 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    li a1, 32
 ; CHECK-NEXT:    vsetvli zero, a1, e32, m8, ta, ma
 ; CHECK-NEXT:    vle32.v v8, (a0)
 ; CHECK-NEXT:    vsetivli zero, 16, e32, m8, ta, ma
 ; CHECK-NEXT:    vslidedown.vi v16, v8, 16
 ; CHECK-NEXT:    vsetivli zero, 16, e32, m4, ta, ma
 ; CHECK-NEXT:    vfwadd.vv v24, v8, v16
-; CHECK-NEXT:    vsetivli zero, 16, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v8, fa0
 ; CHECK-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; CHECK-NEXT:    vfmv.s.f v8, fa0
 ; CHECK-NEXT:    vfredusum.vs v8, v24, v8
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %v = load <32 x float>, <32 x float>* %x
   %e = fpext <32 x float> %v to <32 x double>
   %red = call reassoc double @llvm.vector.reduce.fadd.v32f64(double %s, <32 x double> %e)
   ret double %red
 }

llvm/test/CodeGen/RISCV/rvv/fixed-vectors-reduction-int.ll

 ; RV32:       # %bb.0:
 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetvli zero, a1, e32, m8, ta, ma
 ; RV32-NEXT:    vle32.v v8, (a0)
 ; RV32-NEXT:    vsetivli zero, 16, e32, m8, ta, ma
 ; RV32-NEXT:    vslidedown.vi v16, v8, 16
 ; RV32-NEXT:    vsetivli zero, 16, e32, m4, ta, ma
 ; RV32-NEXT:    vwadd.vv v24, v8, v16
-; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
-; RV32-NEXT:    vmv.s.x v8, zero
 ; RV32-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; RV32-NEXT:    vmv.s.x v8, zero
 ; RV32-NEXT:    vredsum.vs v8, v24, v8
 ; RV32-NEXT:    vmv.x.s a0, v8
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vwreduce_add_v32i64:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    li a1, 32
 ; RV64-NEXT:    vsetvli zero, a1, e32, m8, ta, ma
 ; RV64-NEXT:    vle32.v v8, (a0)
 ; RV64-NEXT:    vsetivli zero, 16, e32, m8, ta, ma
 ; RV64-NEXT:    vslidedown.vi v16, v8, 16
 ; RV64-NEXT:    vsetivli zero, 16, e32, m4, ta, ma
 ; RV64-NEXT:    vwadd.vv v24, v8, v16
-; RV64-NEXT:    vsetivli zero, 16, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v8, zero
 ; RV64-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; RV64-NEXT:    vmv.s.x v8, zero
 ; RV64-NEXT:    vredsum.vs v8, v24, v8
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %v = load <32 x i32>, <32 x i32>* %x
   %e = sext <32 x i32> %v to <32 x i64>
   %red = call i64 @llvm.vector.reduce.add.v32i64(<32 x i64> %e)
   ret i64 %red
 }
 
 define i64 @vwreduce_uadd_v32i64(<32 x i32>* %x) {
 ; RV32-LABEL: vwreduce_uadd_v32i64:
 ; RV32:       # %bb.0:
 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetvli zero, a1, e32, m8, ta, ma
 ; RV32-NEXT:    vle32.v v8, (a0)
 ; RV32-NEXT:    vsetivli zero, 16, e32, m8, ta, ma
 ; RV32-NEXT:    vslidedown.vi v16, v8, 16
 ; RV32-NEXT:    vsetivli zero, 16, e32, m4, ta, ma
 ; RV32-NEXT:    vwaddu.vv v24, v8, v16
-; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
-; RV32-NEXT:    vmv.s.x v8, zero
 ; RV32-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; RV32-NEXT:    vmv.s.x v8, zero
 ; RV32-NEXT:    vredsum.vs v8, v24, v8
 ; RV32-NEXT:    vmv.x.s a0, v8
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vwreduce_uadd_v32i64:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    li a1, 32
 ; RV64-NEXT:    vsetvli zero, a1, e32, m8, ta, ma
 ; RV64-NEXT:    vle32.v v8, (a0)
 ; RV64-NEXT:    vsetivli zero, 16, e32, m8, ta, ma
 ; RV64-NEXT:    vslidedown.vi v16, v8, 16
 ; RV64-NEXT:    vsetivli zero, 16, e32, m4, ta, ma
 ; RV64-NEXT:    vwaddu.vv v24, v8, v16
-; RV64-NEXT:    vsetivli zero, 16, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v8, zero
 ; RV64-NEXT:    vsetivli zero, 16, e64, m8, ta, ma
+; RV64-NEXT:    vmv.s.x v8, zero
 ; RV64-NEXT:    vredsum.vs v8, v24, v8
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %v = load <32 x i32>, <32 x i32>* %x
   %e = zext <32 x i32> %v to <32 x i64>
   %red = call i64 @llvm.vector.reduce.add.v32i64(<32 x i64> %e)
   ret i64 %red
 }

llvm/test/CodeGen/RISCV/rvv/fold-binary-reduce.ll

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc -mtriple=riscv64 -mattr=+d,+zfh,+experimental-zvfh,+v,+zbb -riscv-v-vector-bits-min=128 -target-abi=lp64d -verify-machineinstrs < %s | FileCheck %s
 
 define i64 @reduce_add(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_add:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredsum.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> %v)
   %res = add i64 %rdx, %x
   ret i64 %res
 }
entry:
   %rdx = call i64 @llvm.vector.reduce.add.v4i64(<4 x i64> %v)
   %res = add i64 %rdx, 8
   ret i64 %res
 }
 
 define i64 @reduce_and(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_and:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredand.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.and.v4i64(<4 x i64> %v)
   %res = and i64 %rdx, %x
   ret i64 %res
 }
entry:
   %rdx = call i64 @llvm.vector.reduce.and.v4i64(<4 x i64> %v)
   %res = and i64 %rdx, 8
   ret i64 %res
 }
 
 define i64 @reduce_or(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_or:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredor.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.or.v4i64(<4 x i64> %v)
   %res = or i64 %rdx, %x
   ret i64 %res
 }
entry:
   %rdx = call i64 @llvm.vector.reduce.or.v4i64(<4 x i64> %v)
   %res = or i64 %rdx, 8
   ret i64 %res
 }
 
 define i64 @reduce_xor(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_xor:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredxor.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.xor.v4i64(<4 x i64> %v)
   %res = xor i64 %rdx, %x
   ret i64 %res
 }
 
 define i64 @reduce_xor2(<4 x i64> %v) {
 ; CHECK-LABEL: reduce_xor2:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vredxor.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    andi a0, a0, 8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.xor.v4i64(<4 x i64> %v)
   %res = and i64 %rdx, 8
   ret i64 %res
 }
 
 define i64 @reduce_umax(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_umax:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredmaxu.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.umax.v4i64(<4 x i64> %v)
   %res = call i64 @llvm.umax.i64(i64 %rdx, i64 %x)
   ret i64 %res
 }
entry:
   %rdx = call i64 @llvm.vector.reduce.umax.v4i64(<4 x i64> %v)
   %res = call i64 @llvm.umax.i64(i64 %rdx, i64 8)
   ret i64 %res
 }
 
 define i64 @reduce_umin(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_umin:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredminu.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.umin.v4i64(<4 x i64> %v)
   %res = call i64 @llvm.umin.i64(i64 %rdx, i64 %x)
   ret i64 %res
 }
entry:
   %rdx = call i64 @llvm.vector.reduce.umin.v4i64(<4 x i64> %v)
   %res = call i64 @llvm.umin.i64(i64 %rdx, i64 8)
   ret i64 %res
 }
 
 define i64 @reduce_smax(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_smax:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredmax.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.smax.v4i64(<4 x i64> %v)
   %res = call i64 @llvm.smax.i64(i64 %rdx, i64 %x)
   ret i64 %res
 }
entry:
   %rdx = call i64 @llvm.vector.reduce.smax.v4i64(<4 x i64> %v)
   %res = call i64 @llvm.smax.i64(i64 %rdx, i64 8)
   ret i64 %res
 }
 
 define i64 @reduce_smin(i64 %x, <4 x i64> %v) {
 ; CHECK-LABEL: reduce_smin:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vsetivli zero, 4, e64, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vsetivli zero, 4, e64, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, a0
 ; CHECK-NEXT:    vredmin.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
 entry:
   %rdx = call i64 @llvm.vector.reduce.smin.v4i64(<4 x i64> %v)
   %res = call i64 @llvm.smin.i64(i64 %rdx, i64 %x)
   ret i64 %res
 }

llvm/test/CodeGen/RISCV/rvv/vreductions-fp-sdnode.ll

; CHECK-NEXT:    ret
   ret float %red
 }
 
 declare float @llvm.vector.reduce.fadd.nxv4f32(float, <vscale x 4 x float>)
 
 define float @vreduce_fadd_nxv4f32(<vscale x 4 x float> %v, float %s) {
 ; CHECK-LABEL: vreduce_fadd_nxv4f32:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vfredusum.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call reassoc float @llvm.vector.reduce.fadd.nxv4f32(float %s, <vscale x 4 x float> %v)
   ret float %red
 }
 
 define float @vreduce_ord_fadd_nxv4f32(<vscale x 4 x float> %v, float %s) {
 ; CHECK-LABEL: vreduce_ord_fadd_nxv4f32:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vfredosum.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call float @llvm.vector.reduce.fadd.nxv4f32(float %s, <vscale x 4 x float> %v)
   ret float %red
 }
 
 define float @vreduce_fwadd_nxv4f32(<vscale x 4 x half> %v, float %s) {
; CHECK-NEXT:    ret
   ret double %red
 }
 
 declare double @llvm.vector.reduce.fadd.nxv2f64(double, <vscale x 2 x double>)
 
 define double @vreduce_fadd_nxv2f64(<vscale x 2 x double> %v, double %s) {
 ; CHECK-LABEL: vreduce_fadd_nxv2f64:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vfredusum.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call reassoc double @llvm.vector.reduce.fadd.nxv2f64(double %s, <vscale x 2 x double> %v)
   ret double %red
 }
 
 define double @vreduce_ord_fadd_nxv2f64(<vscale x 2 x double> %v, double %s) {
 ; CHECK-LABEL: vreduce_ord_fadd_nxv2f64:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vfredosum.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call double @llvm.vector.reduce.fadd.nxv2f64(double %s, <vscale x 2 x double> %v)
   ret double %red
 }
 
 define double @vreduce_fwadd_nxv2f64(<vscale x 2 x float> %v, double %s) {
; CHECK-NEXT:    ret
   ret double %red
 }
 
 declare double @llvm.vector.reduce.fadd.nxv4f64(double, <vscale x 4 x double>)
 
 define double @vreduce_fadd_nxv4f64(<vscale x 4 x double> %v, double %s) {
 ; CHECK-LABEL: vreduce_fadd_nxv4f64:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v12, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; CHECK-NEXT:    vfmv.s.f v12, fa0
 ; CHECK-NEXT:    vfredusum.vs v8, v8, v12
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call reassoc double @llvm.vector.reduce.fadd.nxv4f64(double %s, <vscale x 4 x double> %v)
   ret double %red
 }
 
 define double @vreduce_ord_fadd_nxv4f64(<vscale x 4 x double> %v, double %s) {
 ; CHECK-LABEL: vreduce_ord_fadd_nxv4f64:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v12, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; CHECK-NEXT:    vfmv.s.f v12, fa0
 ; CHECK-NEXT:    vfredosum.vs v8, v8, v12
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call double @llvm.vector.reduce.fadd.nxv4f64(double %s, <vscale x 4 x double> %v)
   ret double %red
 }
 
 define double @vreduce_fwadd_nxv4f64(<vscale x 4 x float> %v, double %s) {

 
 declare float @llvm.vector.reduce.fmin.nxv4f32(<vscale x 4 x float>)
 
 define float @vreduce_fmin_nxv4f32(<vscale x 4 x float> %v) {
 ; CHECK-LABEL: vreduce_fmin_nxv4f32:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    lui a0, %hi(.LCPI40_0)
 ; CHECK-NEXT:    flw ft0, %lo(.LCPI40_0)(a0)
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vfredmin.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call float @llvm.vector.reduce.fmin.nxv4f32(<vscale x 4 x float> %v)
   ret float %red
 }
 
 declare float @llvm.vector.reduce.fmin.nxv32f32(<vscale x 32 x float>)

 
 declare double @llvm.vector.reduce.fmin.nxv2f64(<vscale x 2 x double>)
 
 define double @vreduce_fmin_nxv2f64(<vscale x 2 x double> %v) {
 ; CHECK-LABEL: vreduce_fmin_nxv2f64:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    lui a0, %hi(.LCPI45_0)
 ; CHECK-NEXT:    fld ft0, %lo(.LCPI45_0)(a0)
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vfredmin.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call double @llvm.vector.reduce.fmin.nxv2f64(<vscale x 2 x double> %v)
   ret double %red
 }
 
 declare double @llvm.vector.reduce.fmin.nxv4f64(<vscale x 4 x double>)
 
 define double @vreduce_fmin_nxv4f64(<vscale x 4 x double> %v) {
 ; CHECK-LABEL: vreduce_fmin_nxv4f64:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    lui a0, %hi(.LCPI46_0)
 ; CHECK-NEXT:    fld ft0, %lo(.LCPI46_0)(a0)
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v12, ft0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; CHECK-NEXT:    vfmv.s.f v12, ft0
 ; CHECK-NEXT:    vfredmin.vs v8, v8, v12
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call double @llvm.vector.reduce.fmin.nxv4f64(<vscale x 4 x double> %v)
   ret double %red
 }
 
 declare double @llvm.vector.reduce.fmin.nxv16f64(<vscale x 16 x double>)

 
 declare float @llvm.vector.reduce.fmax.nxv4f32(<vscale x 4 x float>)
 
 define float @vreduce_fmax_nxv4f32(<vscale x 4 x float> %v) {
 ; CHECK-LABEL: vreduce_fmax_nxv4f32:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    lui a0, %hi(.LCPI58_0)
 ; CHECK-NEXT:    flw ft0, %lo(.LCPI58_0)(a0)
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vfredmax.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call float @llvm.vector.reduce.fmax.nxv4f32(<vscale x 4 x float> %v)
   ret float %red
 }
 
 declare float @llvm.vector.reduce.fmax.nxv32f32(<vscale x 32 x float>)

 
 declare double @llvm.vector.reduce.fmax.nxv2f64(<vscale x 2 x double>)
 
 define double @vreduce_fmax_nxv2f64(<vscale x 2 x double> %v) {
 ; CHECK-LABEL: vreduce_fmax_nxv2f64:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    lui a0, %hi(.LCPI63_0)
 ; CHECK-NEXT:    fld ft0, %lo(.LCPI63_0)(a0)
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, ft0
 ; CHECK-NEXT:    vfredmax.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call double @llvm.vector.reduce.fmax.nxv2f64(<vscale x 2 x double> %v)
   ret double %red
 }
 
 declare double @llvm.vector.reduce.fmax.nxv4f64(<vscale x 4 x double>)
 
 define double @vreduce_fmax_nxv4f64(<vscale x 4 x double> %v) {
 ; CHECK-LABEL: vreduce_fmax_nxv4f64:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    lui a0, %hi(.LCPI64_0)
 ; CHECK-NEXT:    fld ft0, %lo(.LCPI64_0)(a0)
-; CHECK-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v12, ft0
 ; CHECK-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; CHECK-NEXT:    vfmv.s.f v12, ft0
 ; CHECK-NEXT:    vfredmax.vs v8, v8, v12
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call double @llvm.vector.reduce.fmax.nxv4f64(<vscale x 4 x double> %v)
   ret double %red
 }
 
 declare double @llvm.vector.reduce.fmax.nxv16f64(<vscale x 16 x double>)

 ; CHECK-NEXT:    srli a0, a0, 2
 ; CHECK-NEXT:    add a1, a0, a0
 ; CHECK-NEXT:    fmv.h.x ft0, zero
 ; CHECK-NEXT:    fneg.h ft0, ft0
 ; CHECK-NEXT:    vsetvli a2, zero, e16, m1, ta, ma
 ; CHECK-NEXT:    vfmv.v.f v10, ft0
 ; CHECK-NEXT:    vsetvli zero, a1, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vx v9, v10, a0
-; CHECK-NEXT:    vsetvli a0, zero, e16, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e16, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vfredosum.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call half @llvm.vector.reduce.fadd.nxv6f16(half %s, <vscale x 6 x half> %v)
   ret half %red
 }
 
 declare half @llvm.vector.reduce.fadd.nxv10f16(half, <vscale x 10 x half>)

 ; CHECK-NEXT:    vsetvli a2, zero, e16, m1, ta, ma
 ; CHECK-NEXT:    vfmv.v.f v12, ft0
 ; CHECK-NEXT:    vsetvli zero, a1, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vx v10, v12, a0
 ; CHECK-NEXT:    vsetvli zero, a0, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vi v11, v12, 0
 ; CHECK-NEXT:    vsetvli zero, a1, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vx v11, v12, a0
-; CHECK-NEXT:    vsetvli a0, zero, e16, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v12, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
+; CHECK-NEXT:    vfmv.s.f v12, fa0
 ; CHECK-NEXT:    vfredosum.vs v8, v8, v12
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call half @llvm.vector.reduce.fadd.nxv10f16(half %s, <vscale x 10 x half> %v)
   ret half %red
 }
 
 declare half @llvm.vector.reduce.fadd.nxv12f16(half, <vscale x 12 x half>)

 ; CHECK-NEXT:    srli a0, a0, 2
 ; CHECK-NEXT:    add a1, a0, a0
 ; CHECK-NEXT:    fmv.h.x ft0, zero
 ; CHECK-NEXT:    fneg.h ft0, ft0
 ; CHECK-NEXT:    vsetvli a2, zero, e16, m1, ta, ma
 ; CHECK-NEXT:    vfmv.v.f v10, ft0
 ; CHECK-NEXT:    vsetvli zero, a1, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vx v9, v10, a0
-; CHECK-NEXT:    vsetvli a0, zero, e16, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vsetvli a0, zero, e16, m2, ta, ma
+; CHECK-NEXT:    vfmv.s.f v10, fa0
 ; CHECK-NEXT:    vfredusum.vs v8, v8, v10
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call reassoc half @llvm.vector.reduce.fadd.nxv6f16(half %s, <vscale x 6 x half> %v)
   ret half %red
 }
 
 declare half @llvm.vector.reduce.fmin.nxv10f16(<vscale x 10 x half>)

 ; CHECK-NEXT:    vsetvli a2, zero, e16, m1, ta, ma
 ; CHECK-NEXT:    vfmv.v.f v12, ft0
 ; CHECK-NEXT:    vsetvli zero, a1, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vx v10, v12, a0
 ; CHECK-NEXT:    vsetvli zero, a0, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vi v11, v12, 0
 ; CHECK-NEXT:    vsetvli zero, a1, e16, m1, tu, ma
 ; CHECK-NEXT:    vslideup.vx v11, v12, a0
-; CHECK-NEXT:    vsetvli a0, zero, e16, m1, ta, ma
-; CHECK-NEXT:    vfmv.s.f v12, ft0
 ; CHECK-NEXT:    vsetvli a0, zero, e16, m4, ta, ma
+; CHECK-NEXT:    vfmv.s.f v12, ft0
 ; CHECK-NEXT:    vfredmin.vs v8, v8, v12
 ; CHECK-NEXT:    vfmv.f.s fa0, v8
 ; CHECK-NEXT:    ret
   %red = call half @llvm.vector.reduce.fmin.nxv10f16(<vscale x 10 x half> %v)
   ret half %red
 }
 
 declare half @llvm.vector.reduce.fmax.nxv12f16(<vscale x 12 x half>)

llvm/test/CodeGen/RISCV/rvv/vreductions-int.ll

; CHECK-NEXT:    ret
   ret i32 %red
 }
 
 declare i32 @llvm.vector.reduce.add.nxv4i32(<vscale x 4 x i32>)
 
 define signext i32 @vreduce_add_nxv4i32(<vscale x 4 x i32> %v) {
 ; CHECK-LABEL: vreduce_add_nxv4i32:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vredsum.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
   %red = call i32 @llvm.vector.reduce.add.nxv4i32(<vscale x 4 x i32> %v)
   ret i32 %red
 }
 
 define signext i32 @vwreduce_add_nxv4i16(<vscale x 4 x i16> %v) {
; CHECK-NEXT:    ret
   ret i32 %red
 }
 
 declare i32 @llvm.vector.reduce.umax.nxv4i32(<vscale x 4 x i32>)
 
 define signext i32 @vreduce_umax_nxv4i32(<vscale x 4 x i32> %v) {
 ; CHECK-LABEL: vreduce_umax_nxv4i32:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vredmaxu.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
   %red = call i32 @llvm.vector.reduce.umax.nxv4i32(<vscale x 4 x i32> %v)
   ret i32 %red
 }
 
 declare i32 @llvm.vector.reduce.smax.nxv4i32(<vscale x 4 x i32>)
 
 define signext i32 @vreduce_smax_nxv4i32(<vscale x 4 x i32> %v) {
 ; CHECK-LABEL: vreduce_smax_nxv4i32:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    lui a0, 524288
-; CHECK-NEXT:    vsetvli a1, zero, e32, m1, ta, ma
+; CHECK-NEXT:    vsetvli a1, zero, e32, m2, ta, ma
 ; CHECK-NEXT:    vmv.s.x v10, a0
-; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
 ; CHECK-NEXT:    vredmax.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
   %red = call i32 @llvm.vector.reduce.smax.nxv4i32(<vscale x 4 x i32> %v)
   ret i32 %red
 }
 
 declare i32 @llvm.vector.reduce.umin.nxv4i32(<vscale x 4 x i32>)

 
 declare i32 @llvm.vector.reduce.smin.nxv4i32(<vscale x 4 x i32>)
 
 define signext i32 @vreduce_smin_nxv4i32(<vscale x 4 x i32> %v) {
 ; RV32-LABEL: vreduce_smin_nxv4i32:
 ; RV32:       # %bb.0:
 ; RV32-NEXT:    lui a0, 524288
 ; RV32-NEXT:    addi a0, a0, -1
-; RV32-NEXT:    vsetvli a1, zero, e32, m1, ta, ma
+; RV32-NEXT:    vsetvli a1, zero, e32, m2, ta, ma
 ; RV32-NEXT:    vmv.s.x v10, a0
-; RV32-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
 ; RV32-NEXT:    vredmin.vs v8, v8, v10
 ; RV32-NEXT:    vmv.x.s a0, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_smin_nxv4i32:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    lui a0, 524288
 ; RV64-NEXT:    addiw a0, a0, -1
-; RV64-NEXT:    vsetvli a1, zero, e32, m1, ta, ma
+; RV64-NEXT:    vsetvli a1, zero, e32, m2, ta, ma
 ; RV64-NEXT:    vmv.s.x v10, a0
-; RV64-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
 ; RV64-NEXT:    vredmin.vs v8, v8, v10
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i32 @llvm.vector.reduce.smin.nxv4i32(<vscale x 4 x i32> %v)
   ret i32 %red
 }
 
 declare i32 @llvm.vector.reduce.and.nxv4i32(<vscale x 4 x i32>)
; CHECK-NEXT:    ret
   ret i32 %red
 }
 
 declare i32 @llvm.vector.reduce.or.nxv4i32(<vscale x 4 x i32>)
 
 define signext i32 @vreduce_or_nxv4i32(<vscale x 4 x i32> %v) {
 ; CHECK-LABEL: vreduce_or_nxv4i32:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vredor.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
   %red = call i32 @llvm.vector.reduce.or.nxv4i32(<vscale x 4 x i32> %v)
   ret i32 %red
 }
 
 declare i32 @llvm.vector.reduce.xor.nxv4i32(<vscale x 4 x i32>)
 
 define signext i32 @vreduce_xor_nxv4i32(<vscale x 4 x i32> %v) {
 ; CHECK-LABEL: vreduce_xor_nxv4i32:
 ; CHECK:       # %bb.0:
-; CHECK-NEXT:    vsetvli a0, zero, e32, m1, ta, ma
-; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vsetvli a0, zero, e32, m2, ta, ma
+; CHECK-NEXT:    vmv.s.x v10, zero
 ; CHECK-NEXT:    vredxor.vs v8, v8, v10
 ; CHECK-NEXT:    vmv.x.s a0, v8
 ; CHECK-NEXT:    ret
   %red = call i32 @llvm.vector.reduce.xor.nxv4i32(<vscale x 4 x i32> %v)
   ret i32 %red
 }
 
 declare i64 @llvm.vector.reduce.add.nxv1i64(<vscale x 1 x i64>)

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_add_nxv2i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vredsum.vs v8, v8, v10
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.add.nxv2i64(<vscale x 2 x i64> %v)
   ret i64 %red
 }
 
 define i64 @vwreduce_add_nxv2i32(<vscale x 2 x i32> %v) {

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_umax_nxv2i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vredmaxu.vs v8, v8, v10
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.umax.nxv2i64(<vscale x 2 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.smax.nxv2i64(<vscale x 2 x i64>)

 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    addi sp, sp, 16
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_smax_nxv2i64:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    li a0, -1
 ; RV64-NEXT:    slli a0, a0, 63
-; RV64-NEXT:    vsetvli a1, zero, e64, m1, ta, ma
+; RV64-NEXT:    vsetvli a1, zero, e64, m2, ta, ma
 ; RV64-NEXT:    vmv.s.x v10, a0
-; RV64-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
 ; RV64-NEXT:    vredmax.vs v8, v8, v10
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.smax.nxv2i64(<vscale x 2 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.umin.nxv2i64(<vscale x 2 x i64>)

 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    addi sp, sp, 16
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_smin_nxv2i64:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    li a0, -1
 ; RV64-NEXT:    srli a0, a0, 1
-; RV64-NEXT:    vsetvli a1, zero, e64, m1, ta, ma
+; RV64-NEXT:    vsetvli a1, zero, e64, m2, ta, ma
 ; RV64-NEXT:    vmv.s.x v10, a0
-; RV64-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
 ; RV64-NEXT:    vredmin.vs v8, v8, v10
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.smin.nxv2i64(<vscale x 2 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.and.nxv2i64(<vscale x 2 x i64>)

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_or_nxv2i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vredor.vs v8, v8, v10
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.or.nxv2i64(<vscale x 2 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.xor.nxv2i64(<vscale x 2 x i64>)

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_xor_nxv2i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m2, ta, ma
+; RV64-NEXT:    vmv.s.x v10, zero
 ; RV64-NEXT:    vredxor.vs v8, v8, v10
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.xor.nxv2i64(<vscale x 2 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.add.nxv4i64(<vscale x 4 x i64>)

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_add_nxv4i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vredsum.vs v8, v8, v12
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.add.nxv4i64(<vscale x 4 x i64> %v)
   ret i64 %red
 }
 
 define i64 @vwreduce_add_nxv4i32(<vscale x 4 x i32> %v) {

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_umax_nxv4i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vredmaxu.vs v8, v8, v12
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.umax.nxv4i64(<vscale x 4 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.smax.nxv4i64(<vscale x 4 x i64>)

 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    addi sp, sp, 16
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_smax_nxv4i64:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    li a0, -1
 ; RV64-NEXT:    slli a0, a0, 63
-; RV64-NEXT:    vsetvli a1, zero, e64, m1, ta, ma
+; RV64-NEXT:    vsetvli a1, zero, e64, m4, ta, ma
 ; RV64-NEXT:    vmv.s.x v12, a0
-; RV64-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
 ; RV64-NEXT:    vredmax.vs v8, v8, v12
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.smax.nxv4i64(<vscale x 4 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.umin.nxv4i64(<vscale x 4 x i64>)

 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    addi sp, sp, 16
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_smin_nxv4i64:
 ; RV64:       # %bb.0:
 ; RV64-NEXT:    li a0, -1
 ; RV64-NEXT:    srli a0, a0, 1
-; RV64-NEXT:    vsetvli a1, zero, e64, m1, ta, ma
+; RV64-NEXT:    vsetvli a1, zero, e64, m4, ta, ma
 ; RV64-NEXT:    vmv.s.x v12, a0
-; RV64-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
 ; RV64-NEXT:    vredmin.vs v8, v8, v12
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.smin.nxv4i64(<vscale x 4 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.and.nxv4i64(<vscale x 4 x i64>)

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_or_nxv4i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vredor.vs v8, v8, v12
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.or.nxv4i64(<vscale x 4 x i64> %v)
   ret i64 %red
 }
 
 declare i64 @llvm.vector.reduce.xor.nxv4i64(<vscale x 4 x i64>)

 ; RV32-NEXT:    li a1, 32
 ; RV32-NEXT:    vsetivli zero, 1, e64, m1, ta, ma
 ; RV32-NEXT:    vsrl.vx v8, v8, a1
 ; RV32-NEXT:    vmv.x.s a1, v8
 ; RV32-NEXT:    ret
 ;
 ; RV64-LABEL: vreduce_xor_nxv4i64:
 ; RV64:       # %bb.0:
-; RV64-NEXT:    vsetvli a0, zero, e64, m1, ta, ma
-; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vsetvli a0, zero, e64, m4, ta, ma
+; RV64-NEXT:    vmv.s.x v12, zero
 ; RV64-NEXT:    vredxor.vs v8, v8, v12
 ; RV64-NEXT:    vmv.x.s a0, v8
 ; RV64-NEXT:    ret
   %red = call i64 @llvm.vector.reduce.xor.nxv4i64(<vscale x 4 x i64> %v)
   ret i64 %red
 }