diff --git a/llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp b/llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
--- a/llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
@@ -814,22 +814,121 @@
       // By default we do not custom select any intrinsic.
     default:
       break;
+    case Intrinsic::riscv_vmsltu: {
+      SDValue Src1 = Node->getOperand(1);
+      SDValue Src2 = Node->getOperand(2);
+      auto *C = dyn_cast<ConstantSDNode>(Src2);
+      if (!C || C->getSExtValue() != 0)
+        break;
+      // Only deal with vmsltu.vi 0
+      MVT Src1VT = Src1.getSimpleValueType();
+      unsigned VMSLEUOpcode;
+      switch (RISCVTargetLowering::getLMUL(Src1VT)) {
+      default:
+        llvm_unreachable("Unexpected LMUL!");
+      case RISCVII::VLMUL::LMUL_F8:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_MF8;
+        break;
+      case RISCVII::VLMUL::LMUL_F4:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_MF4;
+        break;
+      case RISCVII::VLMUL::LMUL_F2:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_MF2;
+        break;
+      case RISCVII::VLMUL::LMUL_1:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M1;
+        break;
+      case RISCVII::VLMUL::LMUL_2:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M2;
+        break;
+      case RISCVII::VLMUL::LMUL_4:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M4;
+        break;
+      case RISCVII::VLMUL::LMUL_8:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M8;
+        break;
+      }
+
+      SDValue SEW = CurDAG->getTargetConstant(
+          Log2_32(Src1VT.getScalarSizeInBits()), DL, XLenVT);
+      SDValue VL;
+      selectVLOp(Node->getOperand(3), VL);
+      SDValue VLOperand = CurDAG->getRegister(RISCV::X0, XLenVT);
+
+      // Expand to vmsleu.vv X0
+      ReplaceNode(Node, CurDAG->getMachineNode(VMSLEUOpcode, DL, VT,
+                                               {Src1, VLOperand, VL, SEW}));
+      return;
+    }
+    case Intrinsic::riscv_vmsltu_mask: {
+      SDValue Src1 = Node->getOperand(2);
+      SDValue Src2 = Node->getOperand(3);
+      auto *C = dyn_cast<ConstantSDNode>(Src2);
+      if (!C || C->getSExtValue() != 0)
+        break;
+      // Only deal with vmsltu_mask 0
+      MVT Src1VT = Src1.getSimpleValueType();
+      unsigned VMSLEUOpcode;
+      switch (RISCVTargetLowering::getLMUL(Src1VT)) {
+      default:
+        llvm_unreachable("Unexpected LMUL!");
+      case RISCVII::VLMUL::LMUL_F8:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_MF8_MASK;
+        break;
+      case RISCVII::VLMUL::LMUL_F4:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_MF4_MASK;
+        break;
+      case RISCVII::VLMUL::LMUL_F2:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_MF2_MASK;
+        break;
+      case RISCVII::VLMUL::LMUL_1:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M1_MASK;
+        break;
+      case RISCVII::VLMUL::LMUL_2:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M2_MASK;
+        break;
+      case RISCVII::VLMUL::LMUL_4:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M4_MASK;
+        break;
+      case RISCVII::VLMUL::LMUL_8:
+        VMSLEUOpcode = RISCV::PseudoVMSLEU_VX_M8_MASK;
+        break;
+      }
+
+      SDValue SEW = CurDAG->getTargetConstant(
+          Log2_32(Src1VT.getScalarSizeInBits()), DL, XLenVT);
+      SDValue VL;
+      selectVLOp(Node->getOperand(5), VL);
+      SDValue MaskedOff = Node->getOperand(1);
+      SDValue Mask = Node->getOperand(4);
+
+      // Expand to vmsleu_mask X0
+      ReplaceNode(
+          Node, CurDAG->getMachineNode(VMSLEUOpcode, DL, VT,
+                                       {MaskedOff, Src1, Src2, Mask, VL, SEW}));
+      return;
+    }
     case Intrinsic::riscv_vmsgeu:
     case Intrinsic::riscv_vmsge: {
       SDValue Src1 = Node->getOperand(1);
       SDValue Src2 = Node->getOperand(2);
+      bool IsUnsigned = IntNo == Intrinsic::riscv_vmsgeu;
+      bool IsCmpUnsignedZero = false;
       // Only custom select scalar second operand.
       if (Src2.getValueType() != XLenVT)
         break;
       // Small constants are handled with patterns.
       if (auto *C = dyn_cast<ConstantSDNode>(Src2)) {
         int64_t CVal = C->getSExtValue();
-        if (CVal >= -15 && CVal <= 16)
-          break;
+        if (CVal >= -15 && CVal <= 16) {
+          if (IsUnsigned && CVal == 0)
+            IsCmpUnsignedZero = true;
+          else
+            break;
+        }
       }
-      bool IsUnsigned = IntNo == Intrinsic::riscv_vmsgeu;
       MVT Src1VT = Src1.getSimpleValueType();
-      unsigned VMSLTOpcode, VMNANDOpcode;
+      unsigned VMSLTOpcode, VMNANDOpcode, VMSetOpcode;
       switch (RISCVTargetLowering::getLMUL(Src1VT)) {
       default:
         llvm_unreachable("Unexpected LMUL!");
@@ -837,36 +936,43 @@
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF8 : RISCV::PseudoVMSLT_VX_MF8;
         VMNANDOpcode = RISCV::PseudoVMNAND_MM_MF8;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B1;
         break;
       case RISCVII::VLMUL::LMUL_F4:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF4 : RISCV::PseudoVMSLT_VX_MF4;
         VMNANDOpcode = RISCV::PseudoVMNAND_MM_MF4;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B2;
         break;
       case RISCVII::VLMUL::LMUL_F2:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF2 : RISCV::PseudoVMSLT_VX_MF2;
         VMNANDOpcode = RISCV::PseudoVMNAND_MM_MF2;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B4;
         break;
       case RISCVII::VLMUL::LMUL_1:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M1 : RISCV::PseudoVMSLT_VX_M1;
         VMNANDOpcode = RISCV::PseudoVMNAND_MM_M1;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B8;
         break;
       case RISCVII::VLMUL::LMUL_2:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M2 : RISCV::PseudoVMSLT_VX_M2;
         VMNANDOpcode = RISCV::PseudoVMNAND_MM_M2;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B16;
         break;
       case RISCVII::VLMUL::LMUL_4:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M4 : RISCV::PseudoVMSLT_VX_M4;
         VMNANDOpcode = RISCV::PseudoVMNAND_MM_M4;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B32;
         break;
       case RISCVII::VLMUL::LMUL_8:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M8 : RISCV::PseudoVMSLT_VX_M8;
         VMNANDOpcode = RISCV::PseudoVMNAND_MM_M8;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B64;
         break;
       }
       SDValue SEW = CurDAG->getTargetConstant(
@@ -874,6 +980,12 @@
       SDValue VL;
       selectVLOp(Node->getOperand(3), VL);
 
+      // If vmsgeu with 0 immediate, expand it to vmset.
+      if (IsCmpUnsignedZero) {
+        ReplaceNode(Node, CurDAG->getMachineNode(VMSetOpcode, DL, VT, VL, SEW));
+        return;
+      }
+
       // Expand to
       // vmslt{u}.vx vd, va, x; vmnand.mm vd, vd, vd
       SDValue Cmp = SDValue(
@@ -887,18 +999,24 @@
     case Intrinsic::riscv_vmsge_mask: {
       SDValue Src1 = Node->getOperand(2);
       SDValue Src2 = Node->getOperand(3);
+      bool IsUnsigned = IntNo == Intrinsic::riscv_vmsgeu_mask;
+      bool IsCmpUnsignedZero = false;
       // Only custom select scalar second operand.
       if (Src2.getValueType() != XLenVT)
         break;
       // Small constants are handled with patterns.
       if (auto *C = dyn_cast<ConstantSDNode>(Src2)) {
         int64_t CVal = C->getSExtValue();
-        if (CVal >= -15 && CVal <= 16)
-          break;
+        if (CVal >= -15 && CVal <= 16) {
+          if (IsUnsigned && CVal == 0)
+            IsCmpUnsignedZero = true;
+          else
+            break;
+        }
       }
-      bool IsUnsigned = IntNo == Intrinsic::riscv_vmsgeu_mask;
       MVT Src1VT = Src1.getSimpleValueType();
-      unsigned VMSLTOpcode, VMSLTMaskOpcode, VMXOROpcode, VMANDNOpcode;
+      unsigned VMSLTOpcode, VMSLTMaskOpcode, VMXOROpcode, VMANDNOpcode,
+          VMSetOpcode, VMANDOpcode;
       switch (RISCVTargetLowering::getLMUL(Src1VT)) {
       default:
         llvm_unreachable("Unexpected LMUL!");
@@ -907,42 +1025,49 @@
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF8 : RISCV::PseudoVMSLT_VX_MF8;
         VMSLTMaskOpcode = IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF8_MASK
                                      : RISCV::PseudoVMSLT_VX_MF8_MASK;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B1;
         break;
       case RISCVII::VLMUL::LMUL_F4:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF4 : RISCV::PseudoVMSLT_VX_MF4;
         VMSLTMaskOpcode = IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF4_MASK
                                      : RISCV::PseudoVMSLT_VX_MF4_MASK;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B2;
         break;
       case RISCVII::VLMUL::LMUL_F2:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF2 : RISCV::PseudoVMSLT_VX_MF2;
         VMSLTMaskOpcode = IsUnsigned ? RISCV::PseudoVMSLTU_VX_MF2_MASK
                                      : RISCV::PseudoVMSLT_VX_MF2_MASK;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B4;
         break;
       case RISCVII::VLMUL::LMUL_1:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M1 : RISCV::PseudoVMSLT_VX_M1;
         VMSLTMaskOpcode = IsUnsigned ? RISCV::PseudoVMSLTU_VX_M1_MASK
                                      : RISCV::PseudoVMSLT_VX_M1_MASK;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B8;
         break;
       case RISCVII::VLMUL::LMUL_2:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M2 : RISCV::PseudoVMSLT_VX_M2;
         VMSLTMaskOpcode = IsUnsigned ? RISCV::PseudoVMSLTU_VX_M2_MASK
                                      : RISCV::PseudoVMSLT_VX_M2_MASK;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B16;
         break;
       case RISCVII::VLMUL::LMUL_4:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M4 : RISCV::PseudoVMSLT_VX_M4;
         VMSLTMaskOpcode = IsUnsigned ? RISCV::PseudoVMSLTU_VX_M4_MASK
                                      : RISCV::PseudoVMSLT_VX_M4_MASK;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B32;
         break;
       case RISCVII::VLMUL::LMUL_8:
         VMSLTOpcode =
             IsUnsigned ? RISCV::PseudoVMSLTU_VX_M8 : RISCV::PseudoVMSLT_VX_M8;
         VMSLTMaskOpcode = IsUnsigned ? RISCV::PseudoVMSLTU_VX_M8_MASK
                                      : RISCV::PseudoVMSLT_VX_M8_MASK;
+        VMSetOpcode = RISCV::PseudoVMSET_M_B64;
         break;
       }
       // Mask operations use the LMUL from the mask type.
@@ -952,30 +1077,37 @@
       case RISCVII::VLMUL::LMUL_F8:
         VMXOROpcode = RISCV::PseudoVMXOR_MM_MF8;
         VMANDNOpcode = RISCV::PseudoVMANDN_MM_MF8;
+        VMANDOpcode = RISCV::PseudoVMAND_MM_MF8;
         break;
       case RISCVII::VLMUL::LMUL_F4:
         VMXOROpcode = RISCV::PseudoVMXOR_MM_MF4;
         VMANDNOpcode = RISCV::PseudoVMANDN_MM_MF4;
+        VMANDOpcode = RISCV::PseudoVMAND_MM_MF4;
         break;
       case RISCVII::VLMUL::LMUL_F2:
         VMXOROpcode = RISCV::PseudoVMXOR_MM_MF2;
         VMANDNOpcode = RISCV::PseudoVMANDN_MM_MF2;
+        VMANDOpcode = RISCV::PseudoVMAND_MM_MF2;
         break;
       case RISCVII::VLMUL::LMUL_1:
         VMXOROpcode = RISCV::PseudoVMXOR_MM_M1;
         VMANDNOpcode = RISCV::PseudoVMANDN_MM_M1;
+        VMANDOpcode = RISCV::PseudoVMAND_MM_M1;
         break;
       case RISCVII::VLMUL::LMUL_2:
         VMXOROpcode = RISCV::PseudoVMXOR_MM_M2;
         VMANDNOpcode = RISCV::PseudoVMANDN_MM_M2;
+        VMANDOpcode = RISCV::PseudoVMAND_MM_M2;
         break;
       case RISCVII::VLMUL::LMUL_4:
         VMXOROpcode = RISCV::PseudoVMXOR_MM_M4;
         VMANDNOpcode = RISCV::PseudoVMANDN_MM_M4;
+        VMANDOpcode = RISCV::PseudoVMAND_MM_M4;
         break;
       case RISCVII::VLMUL::LMUL_8:
         VMXOROpcode = RISCV::PseudoVMXOR_MM_M8;
         VMANDNOpcode = RISCV::PseudoVMANDN_MM_M8;
+        VMANDOpcode = RISCV::PseudoVMAND_MM_M8;
         break;
       }
       SDValue SEW = CurDAG->getTargetConstant(
@@ -985,6 +1117,16 @@
       selectVLOp(Node->getOperand(5), VL);
       SDValue MaskedOff = Node->getOperand(1);
       SDValue Mask = Node->getOperand(4);
+
+      // If vmsgeu_mask with 0 immediate, expand it to {vmset, vmand}.
+      if (IsCmpUnsignedZero) {
+        SDValue VmSet =
+            SDValue(CurDAG->getMachineNode(VMSetOpcode, DL, VT, VL, SEW), 0);
+        ReplaceNode(Node, CurDAG->getMachineNode(VMANDOpcode, DL, VT,
+                                                 {Mask, VmSet, VL, MaskSEW}));
+        return;
+      }
+
       // If the MaskedOff value and the Mask are the same value use
       // vmslt{u}.vx vt, va, x;  vmandn.mm vd, vd, vt
       // This avoids needing to copy v0 to vd before starting the next sequence.
diff --git a/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv32.ll b/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv32.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv32.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv32.ll
@@ -2097,11 +2097,9 @@
 define <vscale x 2 x i1> @intrinsic_vmsgeu_mask_vi_nxv2i16_i16(<vscale x 2 x i1> %0, <vscale x 2 x i16> %1, <vscale x 2 x i1> %2, i32 %3) nounwind {
 ; CHECK-LABEL: intrinsic_vmsgeu_mask_vi_nxv2i16_i16:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vmv1r.v v10, v0
 ; CHECK-NEXT:    vsetvli zero, a0, e16, mf2, ta, mu
-; CHECK-NEXT:    vmv1r.v v0, v9
-; CHECK-NEXT:    vmseq.vv v10, v8, v8, v0.t
-; CHECK-NEXT:    vmv1r.v v0, v10
+; CHECK-NEXT:    vmset.m v8
+; CHECK-NEXT:    vmand.mm v0, v9, v8
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 2 x i1> @llvm.riscv.vmsgeu.mask.nxv2i16.i16(
@@ -2118,7 +2116,7 @@
 ; CHECK-LABEL: intrinsic_vmsgeu_vi_nxv4i16_i16:
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    vsetvli zero, a0, e16, m1, ta, mu
-; CHECK-NEXT:    vmseq.vv v0, v8, v8
+; CHECK-NEXT:    vmset.m v0
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 4 x i1> @llvm.riscv.vmsgeu.nxv4i16.i16(
diff --git a/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv64.ll b/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv64.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv64.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vmsgeu-rv64.ll
@@ -2064,11 +2064,9 @@
 define <vscale x 2 x i1> @intrinsic_vmsgeu_mask_vi_nxv2i16_i16(<vscale x 2 x i1> %0, <vscale x 2 x i16> %1, <vscale x 2 x i1> %2, i64 %3) nounwind {
 ; CHECK-LABEL: intrinsic_vmsgeu_mask_vi_nxv2i16_i16:
 ; CHECK:       # %bb.0: # %entry
-; CHECK-NEXT:    vmv1r.v v10, v0
 ; CHECK-NEXT:    vsetvli zero, a0, e16, mf2, ta, mu
-; CHECK-NEXT:    vmv1r.v v0, v9
-; CHECK-NEXT:    vmseq.vv v10, v8, v8, v0.t
-; CHECK-NEXT:    vmv1r.v v0, v10
+; CHECK-NEXT:    vmset.m v8
+; CHECK-NEXT:    vmand.mm v0, v9, v8
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 2 x i1> @llvm.riscv.vmsgeu.mask.nxv2i16.i16(
@@ -2085,7 +2083,7 @@
 ; CHECK-LABEL: intrinsic_vmsgeu_vi_nxv4i16_i16:
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    vsetvli zero, a0, e16, m1, ta, mu
-; CHECK-NEXT:    vmseq.vv v0, v8, v8
+; CHECK-NEXT:    vmset.m v0
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 4 x i1> @llvm.riscv.vmsgeu.nxv4i16.i16(
diff --git a/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv32.ll b/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv32.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv32.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv32.ll
@@ -2085,7 +2085,7 @@
 ; CHECK-NEXT:    vmv1r.v v10, v0
 ; CHECK-NEXT:    vsetvli zero, a0, e16, mf2, ta, mu
 ; CHECK-NEXT:    vmv1r.v v0, v9
-; CHECK-NEXT:    vmsne.vv v10, v8, v8, v0.t
+; CHECK-NEXT:    vmsleu.vx v10, v8, zero, v0.t
 ; CHECK-NEXT:    vmv1r.v v0, v10
 ; CHECK-NEXT:    ret
 entry:
@@ -2103,7 +2103,7 @@
 ; CHECK-LABEL: intrinsic_vmsltu_vi_nxv4i16_i16:
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    vsetvli zero, a0, e16, m1, ta, mu
-; CHECK-NEXT:    vmsne.vv v0, v8, v8
+; CHECK-NEXT:    vmsleu.vx v0, v8, zero
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 4 x i1> @llvm.riscv.vmsltu.nxv4i16.i16(
diff --git a/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv64.ll b/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv64.ll
--- a/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv64.ll
+++ b/llvm/test/CodeGen/RISCV/rvv/vmsltu-rv64.ll
@@ -2049,7 +2049,7 @@
 ; CHECK-NEXT:    vmv1r.v v10, v0
 ; CHECK-NEXT:    vsetvli zero, a0, e16, mf2, ta, mu
 ; CHECK-NEXT:    vmv1r.v v0, v9
-; CHECK-NEXT:    vmsne.vv v10, v8, v8, v0.t
+; CHECK-NEXT:    vmsleu.vx v10, v8, zero, v0.t
 ; CHECK-NEXT:    vmv1r.v v0, v10
 ; CHECK-NEXT:    ret
 entry:
@@ -2067,7 +2067,7 @@
 ; CHECK-LABEL: intrinsic_vmsltu_vi_nxv4i16_i16:
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    vsetvli zero, a0, e16, m1, ta, mu
-; CHECK-NEXT:    vmsne.vv v0, v8, v8
+; CHECK-NEXT:    vmsleu.vx v0, v8, zero
 ; CHECK-NEXT:    ret
 entry:
   %a = call <vscale x 4 x i1> @llvm.riscv.vmsltu.nxv4i16.i16(