[X86] Update X86InstCombineIntrinsic to use CreateShuffleVector with one vector

[aqjune]

Summary

This patch updates X86InstCombineIntrinsic.cpp to use the newly updated CreateShuffleVector.

The tests are updated because the updated CreateShuffleVector uses poison value for the second vector.
If I didn't miss something, the masks in the tests are choosing elements from the first vector only; therefore the tests are having equivalent behavior.

[RKSimon]

llvm/lib/Target/X86/X86InstCombineIntrinsic.cpp

244

This is a (hidden) unary shuffle as well - please can you update ?

[aqjune]

Fixed, thanks :)

[RKSimon]

LGTM cheers

llvm/lib/Target/X86/X86InstCombineIntrinsic.cpp

 //===-- X86InstCombineIntrinsic.cpp - X86 specific InstCombine pass -------===//
 //
 // 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
 //
 //===----------------------------------------------------------------------===//
 /// \file
if (IsImm) {
     APInt DemandedUpper = APInt::getBitsSet(NumAmtElts, 1, NumAmtElts / 2);
     KnownBits KnownLowerBits = llvm::computeKnownBits(
         Amt, DemandedLower, II.getModule()->getDataLayout());
     KnownBits KnownUpperBits = llvm::computeKnownBits(
         Amt, DemandedUpper, II.getModule()->getDataLayout());
     if (KnownLowerBits.getMaxValue().ult(BitWidth) &&
         (DemandedUpper.isNullValue() || KnownUpperBits.isZero())) {
       SmallVector<int, 16> ZeroSplat(VWidth, 0);
-      Amt = Builder.CreateShuffleVector(Amt, Amt, ZeroSplat);
+      Amt = Builder.CreateShuffleVector(Amt, ZeroSplat);
       return (LogicalShift ? (ShiftLeft ? Builder.CreateShl(Vec, Amt)
                                         : Builder.CreateLShr(Vec, Amt))
                            : Builder.CreateAShr(Vec, Amt));
     }
   }
 
   // Simplify if count is constant vector.
   auto CDV = dyn_cast<ConstantDataVector>(Amt);
for (unsigned I = 0; I < NumElts; ++I) {
     // into the corresponding 128 half. In order to convert to a generic
     // shuffle, we have to make that explicit.
     Index += APInt(32, (I / NumLaneElts) * NumLaneElts);
 
     Indexes[I] = Index.getZExtValue();
   }
 
   auto V1 = II.getArgOperand(0);
-  auto V2 = UndefValue::get(V1->getType());
-  return Builder.CreateShuffleVector(V1, V2, makeArrayRef(Indexes, NumElts));
+  return Builder.CreateShuffleVector(V1, makeArrayRef(Indexes, NumElts));
 }
 
 /// Attempt to convert vpermd/vpermps to shufflevector if the mask is constant.
 static Value *simplifyX86vpermv(const IntrinsicInst &II,
                                 InstCombiner::BuilderTy &Builder) {
   auto *V = dyn_cast<Constant>(II.getArgOperand(1));
   if (!V)
     return nullptr;
for (unsigned I = 0; I < Size; ++I) {
     }
 
     uint32_t Index = cast<ConstantInt>(COp)->getZExtValue();
     Index &= Size - 1;
     Indexes[I] = Index;
   }
 
   auto V1 = II.getArgOperand(0);
-  auto V2 = UndefValue::get(VecTy);
-  return Builder.CreateShuffleVector(V1, V2, makeArrayRef(Indexes, Size));
+  return Builder.CreateShuffleVector(V1, makeArrayRef(Indexes, Size));
 }
 
 Optional<Instruction *>
 X86TTIImpl::instCombineIntrinsic(InstCombiner &IC, IntrinsicInst &II) const {
   auto SimplifyDemandedVectorEltsLow = [&IC](Value *Op, unsigned Width,
                                              unsigned DemandedWidth) {
     APInt UndefElts(Width, 0);
     APInt DemandedElts = APInt::getLowBitsSet(Width, DemandedWidth);

llvm/test/Transforms/InstCombine/X86/x86-avx2-inseltpoison.ll

;
   ret <8 x float> %a
 }
 
 ; Instcombine should be able to fold the following shuffle to a builtin shufflevector
 ; with a shuffle mask of all zeroes.
 
 define <8 x i32> @zero_test_vpermd(<8 x i32> %a0) {
 ; CHECK-LABEL: @zero_test_vpermd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> zeroinitializer)
   ret <8 x i32> %a
 }
 
 define <8 x float> @zero_test_vpermps(<8 x float> %a0) {
 ; CHECK-LABEL: @zero_test_vpermps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> zeroinitializer)
   ret <8 x float> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles.
 
 define <8 x i32> @shuffle_test_vpermd(<8 x i32> %a0) {
 ; CHECK-LABEL: @shuffle_test_vpermd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %a
 }
 
 define <8 x float> @shuffle_test_vpermps(<8 x float> %a0) {
 ; CHECK-LABEL: @shuffle_test_vpermps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles with undef mask elements.
 
 define <8 x i32> @undef_test_vpermd(<8 x i32> %a0) {
 ; CHECK-LABEL: @undef_test_vpermd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %a
 }
 
 define <8 x float> @undef_test_vpermps(<8 x float> %a0) {
 ; CHECK-LABEL: @undef_test_vpermps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 ; Verify simplify demanded elts.
 

llvm/test/Transforms/InstCombine/X86/x86-avx2.ll

;
   ret <8 x float> %a
 }
 
 ; Instcombine should be able to fold the following shuffle to a builtin shufflevector
 ; with a shuffle mask of all zeroes.
 
 define <8 x i32> @zero_test_vpermd(<8 x i32> %a0) {
 ; CHECK-LABEL: @zero_test_vpermd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> zeroinitializer)
   ret <8 x i32> %a
 }
 
 define <8 x float> @zero_test_vpermps(<8 x float> %a0) {
 ; CHECK-LABEL: @zero_test_vpermps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> zeroinitializer)
   ret <8 x float> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles.
 
 define <8 x i32> @shuffle_test_vpermd(<8 x i32> %a0) {
 ; CHECK-LABEL: @shuffle_test_vpermd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %a
 }
 
 define <8 x float> @shuffle_test_vpermps(<8 x float> %a0) {
 ; CHECK-LABEL: @shuffle_test_vpermps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles with undef mask elements.
 
 define <8 x i32> @undef_test_vpermd(<8 x i32> %a0) {
 ; CHECK-LABEL: @undef_test_vpermd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %a = tail call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %a
 }
 
 define <8 x float> @undef_test_vpermps(<8 x float> %a0) {
 ; CHECK-LABEL: @undef_test_vpermps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 ; Verify simplify demanded elts.
 

llvm/test/Transforms/InstCombine/X86/x86-avx512-inseltpoison.ll

;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
 }
 
 define <8 x i32> @zero_test_permvar_si_256(<8 x i32> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_si_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> zeroinitializer)
   ret <8 x i32> %1
 }
 
 define <8 x i32> @zero_test_permvar_si_256_mask(<8 x i32> %a0, <8 x i32> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_si_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i32> [[TMP1]], <8 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
 }
 
 define <8 x i32> @shuffle_test_permvar_si_256(<8 x i32> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %1
 }
 
 define <8 x i32> @shuffle_test_permvar_si_256_mask(<8 x i32> %a0, <8 x i32> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i32> [[TMP1]], <8 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
 }
 
 define <8 x i32> @undef_test_permvar_si_256(<8 x i32> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_si_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %1
 }
 
 define <8 x i32> @undef_test_permvar_si_256_mask(<8 x i32> %a0, <8 x i32> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_si_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i32> [[TMP1]], <8 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
 }
 
 define <8 x float> @zero_test_permvar_sf_256(<8 x float> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_sf_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> zeroinitializer)
   ret <8 x float> %1
 }
 
 define <8 x float> @zero_test_permvar_sf_256_mask(<8 x float> %a0, <8 x float> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_sf_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x float> [[TMP1]], <8 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x float> [[TMP3]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
 }
 
 define <8 x float> @shuffle_test_permvar_sf_256(<8 x float> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %1
 }
 
 define <8 x float> @shuffle_test_permvar_sf_256_mask(<8 x float> %a0, <8 x float> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x float> [[TMP1]], <8 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x float> [[TMP3]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
 }
 
 define <8 x float> @undef_test_permvar_sf_256(<8 x float> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_sf_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %1
 }
 
 define <8 x float> @undef_test_permvar_sf_256_mask(<8 x float> %a0, <8 x float> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_sf_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x float> [[TMP1]], <8 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x float> [[TMP3]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
;
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x i64> %1, <4 x i64> %passthru
   ret <4 x i64> %3
 }
 
 define <4 x i64> @zero_test_permvar_di_256(<4 x i64> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_di_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <4 x i64> [[TMP1]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> zeroinitializer)
   ret <4 x i64> %1
 }
 
 define <4 x i64> @zero_test_permvar_di_256_mask(<4 x i64> %a0, <4 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_di_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x i64> [[TMP1]], <4 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x i64> %1, <4 x i64> %passthru
   ret <4 x i64> %3
 }
 
 define <4 x i64> @shuffle_test_permvar_di_256(<4 x i64> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x i64> [[TMP1]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   ret <4 x i64> %1
 }
 
 define <4 x i64> @shuffle_test_permvar_di_256_mask(<4 x i64> %a0, <4 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x i64> [[TMP1]], <4 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x i64> %1, <4 x i64> %passthru
   ret <4 x i64> %3
 }
 
 define <4 x i64> @undef_test_permvar_di_256(<4 x i64> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_di_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x i64> [[TMP1]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   ret <4 x i64> %1
 }
 
 define <4 x i64> @undef_test_permvar_di_256_mask(<4 x i64> %a0, <4 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_di_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x i64> [[TMP1]], <4 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
;
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x double> %1, <4 x double> %passthru
   ret <4 x double> %3
 }
 
 define <4 x double> @zero_test_permvar_df_256(<4 x double> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_df_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> zeroinitializer)
   ret <4 x double> %1
 }
 
 define <4 x double> @zero_test_permvar_df_256_mask(<4 x double> %a0, <4 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_df_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x double> [[TMP1]], <4 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x double> [[TMP3]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x double> %1, <4 x double> %passthru
   ret <4 x double> %3
 }
 
 define <4 x double> @shuffle_test_permvar_df_256(<4 x double> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   ret <4 x double> %1
 }
 
 define <4 x double> @shuffle_test_permvar_df_256_mask(<4 x double> %a0, <4 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x double> [[TMP1]], <4 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x double> [[TMP3]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x double> %1, <4 x double> %passthru
   ret <4 x double> %3
 }
 
 define <4 x double> @undef_test_permvar_df_256(<4 x double> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_df_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   ret <4 x double> %1
 }
 
 define <4 x double> @undef_test_permvar_df_256_mask(<4 x double> %a0, <4 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_df_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x double> [[TMP1]], <4 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x double> [[TMP3]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
 }
 
 define <16 x i32> @zero_test_permvar_si_512(<16 x i32> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_si_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x i32> [[TMP1]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> zeroinitializer)
   ret <16 x i32> %1
 }
 
 define <16 x i32> @zero_test_permvar_si_512_mask(<16 x i32> %a0, <16 x i32> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_si_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i32> [[TMP1]], <16 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
 }
 
 define <16 x i32> @shuffle_test_permvar_si_512(<16 x i32> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i32> [[TMP1]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x i32> %1
 }
 
 define <16 x i32> @shuffle_test_permvar_si_512_mask(<16 x i32> %a0, <16 x i32> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i32> [[TMP1]], <16 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
 }
 
 define <16 x i32> @undef_test_permvar_si_512(<16 x i32> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_si_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i32> [[TMP1]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x i32> %1
 }
 
 define <16 x i32> @undef_test_permvar_si_512_mask(<16 x i32> %a0, <16 x i32> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_si_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i32> [[TMP1]], <16 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
 }
 
 define <16 x float> @zero_test_permvar_sf_512(<16 x float> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_sf_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> zeroinitializer)
   ret <16 x float> %1
 }
 
 define <16 x float> @zero_test_permvar_sf_512_mask(<16 x float> %a0, <16 x float> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_sf_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x float> [[TMP1]], <16 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x float> [[TMP3]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
 }
 
 define <16 x float> @shuffle_test_permvar_sf_512(<16 x float> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %1
 }
 
 define <16 x float> @shuffle_test_permvar_sf_512_mask(<16 x float> %a0, <16 x float> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x float> [[TMP1]], <16 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x float> [[TMP3]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
 }
 
 define <16 x float> @undef_test_permvar_sf_512(<16 x float> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_sf_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %1
 }
 
 define <16 x float> @undef_test_permvar_sf_512_mask(<16 x float> %a0, <16 x float> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_sf_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x float> [[TMP1]], <16 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x float> [[TMP3]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
 }
 
 define <8 x i64> @zero_test_permvar_di_512(<8 x i64> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_di_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i64> [[TMP1]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> zeroinitializer)
   ret <8 x i64> %1
 }
 
 define <8 x i64> @zero_test_permvar_di_512_mask(<8 x i64> %a0, <8 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_di_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i64> [[TMP1]], <8 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
 }
 
 define <8 x i64> @shuffle_test_permvar_di_512(<8 x i64> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i64> [[TMP1]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x i64> %1
 }
 
 define <8 x i64> @shuffle_test_permvar_di_512_mask(<8 x i64> %a0, <8 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i64> [[TMP1]], <8 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
 }
 
 define <8 x i64> @undef_test_permvar_di_512(<8 x i64> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_di_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i64> [[TMP1]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x i64> %1
 }
 
 define <8 x i64> @undef_test_permvar_di_512_mask(<8 x i64> %a0, <8 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_di_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i64> [[TMP1]], <8 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
 }
 
 define <8 x double> @zero_test_permvar_df_512(<8 x double> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_df_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> zeroinitializer)
   ret <8 x double> %1
 }
 
 define <8 x double> @zero_test_permvar_df_512_mask(<8 x double> %a0, <8 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_df_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x double> [[TMP1]], <8 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x double> [[TMP3]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
 }
 
 define <8 x double> @shuffle_test_permvar_df_512(<8 x double> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x double> %1
 }
 
 define <8 x double> @shuffle_test_permvar_df_512_mask(<8 x double> %a0, <8 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x double> [[TMP1]], <8 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x double> [[TMP3]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
 }
 
 define <8 x double> @undef_test_permvar_df_512(<8 x double> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_df_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x double> %1
 }
 
 define <8 x double> @undef_test_permvar_df_512_mask(<8 x double> %a0, <8 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_df_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x double> [[TMP1]], <8 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x double> [[TMP3]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
 }
 
 define <8 x i16> @zero_test_permvar_hi_128(<8 x i16> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_hi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i16> [[TMP1]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> zeroinitializer)
   ret <8 x i16> %1
 }
 
 define <8 x i16> @zero_test_permvar_hi_128_mask(<8 x i16> %a0, <8 x i16> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_hi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i16> [[TMP1]], <8 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
 }
 
 define <8 x i16> @shuffle_test_permvar_hi_128(<8 x i16> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i16> [[TMP1]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <8 x i16> %1
 }
 
 define <8 x i16> @shuffle_test_permvar_hi_128_mask(<8 x i16> %a0, <8 x i16> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i16> [[TMP1]], <8 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
 }
 
 define <8 x i16> @undef_test_permvar_hi_128(<8 x i16> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_hi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i16> [[TMP1]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 undef, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <8 x i16> %1
 }
 
 define <8 x i16> @undef_test_permvar_hi_128_mask(<8 x i16> %a0, <8 x i16> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_hi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i16> [[TMP1]], <8 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 undef, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7, i16 8, i16 9, i16 10, i16 11, i16 12, i16 13, i16 14, i16 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
 }
 
 define <16 x i16> @zero_test_permvar_hi_256(<16 x i16> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_hi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x i16> [[TMP1]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> zeroinitializer)
   ret <16 x i16> %1
 }
 
 define <16 x i16> @zero_test_permvar_hi_256_mask(<16 x i16> %a0, <16 x i16> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_hi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i16> [[TMP1]], <16 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
 }
 
 define <16 x i16> @shuffle_test_permvar_hi_256(<16 x i16> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i16> [[TMP1]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <16 x i16> %1
 }
 
 define <16 x i16> @shuffle_test_permvar_hi_256_mask(<16 x i16> %a0, <16 x i16> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i16> [[TMP1]], <16 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
 }
 
 define <16 x i16> @undef_test_permvar_hi_256(<16 x i16> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_hi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i16> [[TMP1]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 undef, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <16 x i16> %1
 }
 
 define <16 x i16> @undef_test_permvar_hi_256_mask(<16 x i16> %a0, <16 x i16> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_hi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i16> [[TMP1]], <16 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 undef, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7, i16 8, i16 9, i16 10, i16 11, i16 12, i16 13, i16 14, i16 15, i16 16, i16 17, i16 18, i16 19, i16 20, i16 21, i16 22, i16 23, i16 24, i16 25, i16 26, i16 27, i16 28, i16 29, i16 30, i16 31>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
 }
 
 define <32 x i16> @zero_test_permvar_hi_512(<32 x i16> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_hi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <32 x i16> [[TMP1]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> zeroinitializer)
   ret <32 x i16> %1
 }
 
 define <32 x i16> @zero_test_permvar_hi_512_mask(<32 x i16> %a0, <32 x i16> %passthru, i32 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_hi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i16> [[TMP1]], <32 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> zeroinitializer)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
 }
 
 define <32 x i16> @shuffle_test_permvar_hi_512(<32 x i16> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i16> [[TMP1]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 31, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <32 x i16> %1
 }
 
 define <32 x i16> @shuffle_test_permvar_hi_512_mask(<32 x i16> %a0, <32 x i16> %passthru, i32 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i16> [[TMP1]], <32 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 31, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
 }
 
 define <32 x i16> @undef_test_permvar_hi_512(<32 x i16> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_hi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i16> [[TMP1]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 undef, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <32 x i16> %1
 }
 
 define <32 x i16> @undef_test_permvar_hi_512_mask(<32 x i16> %a0, <32 x i16> %passthru, i32 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_hi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i16> [[TMP1]], <32 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 undef, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
 }
 
 define <16 x i8> @zero_test_permvar_qi_128(<16 x i8> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_qi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x i8> [[TMP1]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> zeroinitializer)
   ret <16 x i8> %1
 }
 
 define <16 x i8> @zero_test_permvar_qi_128_mask(<16 x i8> %a0, <16 x i8> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_qi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i8> [[TMP1]], <16 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i8> [[TMP3]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
 }
 
 define <16 x i8> @shuffle_test_permvar_qi_128(<16 x i8> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i8> [[TMP1]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <16 x i8> %1
 }
 
 define <16 x i8> @shuffle_test_permvar_qi_128_mask(<16 x i8> %a0, <16 x i8> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i8> [[TMP1]], <16 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i8> [[TMP3]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
 }
 
 define <16 x i8> @undef_test_permvar_qi_128(<16 x i8> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_qi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i8> [[TMP1]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 undef, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <16 x i8> %1
 }
 
 define <16 x i8> @undef_test_permvar_qi_128_mask(<16 x i8> %a0, <16 x i8> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_qi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i8> [[TMP1]], <16 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i8> [[TMP3]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 undef, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15, i8 16, i8 17, i8 18, i8 19, i8 20, i8 21, i8 22, i8 23, i8 24, i8 25, i8 26, i8 27, i8 28, i8 29, i8 30, i8 31>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
 }
 
 define <32 x i8> @zero_test_permvar_qi_256(<32 x i8> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_qi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <32 x i8> [[TMP1]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> zeroinitializer)
   ret <32 x i8> %1
 }
 
 define <32 x i8> @zero_test_permvar_qi_256_mask(<32 x i8> %a0, <32 x i8> %passthru, i32 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_qi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i8> [[TMP1]], <32 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i8> [[TMP3]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> zeroinitializer)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
 }
 
 define <32 x i8> @shuffle_test_permvar_qi_256(<32 x i8> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i8> [[TMP1]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <32 x i8> %1
 }
 
 define <32 x i8> @shuffle_test_permvar_qi_256_mask(<32 x i8> %a0, <32 x i8> %passthru, i32 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i8> [[TMP1]], <32 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i8> [[TMP3]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
 }
 
 define <32 x i8> @undef_test_permvar_qi_256(<32 x i8> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_qi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i8> [[TMP1]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 undef, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <32 x i8> %1
 }
 
 define <32 x i8> @undef_test_permvar_qi_256_mask(<32 x i8> %a0, <32 x i8> %passthru, i32 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_qi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i8> [[TMP1]], <32 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i8> [[TMP3]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 undef, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15, i8 16, i8 17, i8 18, i8 19, i8 20, i8 21, i8 22, i8 23, i8 24, i8 25, i8 26, i8 27, i8 28, i8 29, i8 30, i8 31, i8 32, i8 33, i8 34, i8 35, i8 36, i8 37, i8 38, i8 39, i8 40, i8 41, i8 42, i8 43, i8 44, i8 45, i8 46, i8 47, i8 48, i8 49, i8 50, i8 51, i8 52, i8 53, i8 54, i8 55, i8 56, i8 57, i8 58, i8 59, i8 60, i8 61, i8 62, i8 63>)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3
 }
 
 define <64 x i8> @zero_test_permvar_qi_512(<64 x i8> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_qi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <64 x i8> [[TMP1]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> zeroinitializer)
   ret <64 x i8> %1
 }
 
 define <64 x i8> @zero_test_permvar_qi_512_mask(<64 x i8> %a0, <64 x i8> %passthru, i64 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_qi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i64 [[MASK:%.*]] to <64 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <64 x i1> [[TMP2]], <64 x i8> [[TMP1]], <64 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <64 x i8> [[TMP3]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> zeroinitializer)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3
 }
 
 define <64 x i8> @shuffle_test_permvar_qi_512(<64 x i8> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <64 x i8> [[TMP1]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 63, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <64 x i8> %1
 }
 
 define <64 x i8> @shuffle_test_permvar_qi_512_mask(<64 x i8> %a0, <64 x i8> %passthru, i64 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i64 [[MASK:%.*]] to <64 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <64 x i1> [[TMP2]], <64 x i8> [[TMP1]], <64 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <64 x i8> [[TMP3]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 63, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3
 }
 
 define <64 x i8> @undef_test_permvar_qi_512(<64 x i8> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_qi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <64 x i8> [[TMP1]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 undef, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <64 x i8> %1
 }
 
 define <64 x i8> @undef_test_permvar_qi_512_mask(<64 x i8> %a0, <64 x i8> %passthru, i64 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_qi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i64 [[MASK:%.*]] to <64 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <64 x i1> [[TMP2]], <64 x i8> [[TMP1]], <64 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <64 x i8> [[TMP3]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 undef, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3

llvm/test/Transforms/InstCombine/X86/x86-avx512.ll

;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
 }
 
 define <8 x i32> @zero_test_permvar_si_256(<8 x i32> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_si_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> zeroinitializer)
   ret <8 x i32> %1
 }
 
 define <8 x i32> @zero_test_permvar_si_256_mask(<8 x i32> %a0, <8 x i32> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_si_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i32> [[TMP1]], <8 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
 }
 
 define <8 x i32> @shuffle_test_permvar_si_256(<8 x i32> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %1
 }
 
 define <8 x i32> @shuffle_test_permvar_si_256_mask(<8 x i32> %a0, <8 x i32> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i32> [[TMP1]], <8 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
 }
 
 define <8 x i32> @undef_test_permvar_si_256(<8 x i32> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_si_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i32> [[TMP1]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x i32> %1
 }
 
 define <8 x i32> @undef_test_permvar_si_256_mask(<8 x i32> %a0, <8 x i32> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_si_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i32> [[A0:%.*]], <8 x i32> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i32> [[TMP1]], <8 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = call <8 x i32> @llvm.x86.avx2.permd(<8 x i32> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i32> %1, <8 x i32> %passthru
   ret <8 x i32> %3
;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
 }
 
 define <8 x float> @zero_test_permvar_sf_256(<8 x float> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_sf_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> zeroinitializer)
   ret <8 x float> %1
 }
 
 define <8 x float> @zero_test_permvar_sf_256_mask(<8 x float> %a0, <8 x float> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_sf_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x float> [[TMP1]], <8 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x float> [[TMP3]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
 }
 
 define <8 x float> @shuffle_test_permvar_sf_256(<8 x float> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %1
 }
 
 define <8 x float> @shuffle_test_permvar_sf_256_mask(<8 x float> %a0, <8 x float> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x float> [[TMP1]], <8 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x float> [[TMP3]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
 }
 
 define <8 x float> @undef_test_permvar_sf_256(<8 x float> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_sf_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %1
 }
 
 define <8 x float> @undef_test_permvar_sf_256_mask(<8 x float> %a0, <8 x float> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_sf_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x float> [[TMP1]], <8 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x float> [[TMP3]]
 ;
   %1 = call <8 x float> @llvm.x86.avx2.permps(<8 x float> %a0, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x float> %1, <8 x float> %passthru
   ret <8 x float> %3
;
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x i64> %1, <4 x i64> %passthru
   ret <4 x i64> %3
 }
 
 define <4 x i64> @zero_test_permvar_di_256(<4 x i64> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_di_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <4 x i64> [[TMP1]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> zeroinitializer)
   ret <4 x i64> %1
 }
 
 define <4 x i64> @zero_test_permvar_di_256_mask(<4 x i64> %a0, <4 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_di_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x i64> [[TMP1]], <4 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x i64> %1, <4 x i64> %passthru
   ret <4 x i64> %3
 }
 
 define <4 x i64> @shuffle_test_permvar_di_256(<4 x i64> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x i64> [[TMP1]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   ret <4 x i64> %1
 }
 
 define <4 x i64> @shuffle_test_permvar_di_256_mask(<4 x i64> %a0, <4 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x i64> [[TMP1]], <4 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x i64> %1, <4 x i64> %passthru
   ret <4 x i64> %3
 }
 
 define <4 x i64> @undef_test_permvar_di_256(<4 x i64> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_di_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x i64> [[TMP1]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   ret <4 x i64> %1
 }
 
 define <4 x i64> @undef_test_permvar_di_256_mask(<4 x i64> %a0, <4 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_di_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x i64> [[A0:%.*]], <4 x i64> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x i64> [[TMP1]], <4 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = call <4 x i64> @llvm.x86.avx512.permvar.di.256(<4 x i64> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
;
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x double> %1, <4 x double> %passthru
   ret <4 x double> %3
 }
 
 define <4 x double> @zero_test_permvar_df_256(<4 x double> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_df_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> zeroinitializer)
   ret <4 x double> %1
 }
 
 define <4 x double> @zero_test_permvar_df_256_mask(<4 x double> %a0, <4 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_df_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x double> [[TMP1]], <4 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x double> [[TMP3]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x double> %1, <4 x double> %passthru
   ret <4 x double> %3
 }
 
 define <4 x double> @shuffle_test_permvar_df_256(<4 x double> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   ret <4 x double> %1
 }
 
 define <4 x double> @shuffle_test_permvar_df_256_mask(<4 x double> %a0, <4 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x double> [[TMP1]], <4 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x double> [[TMP3]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
   %3 = select <4 x i1> %extract, <4 x double> %1, <4 x double> %passthru
   ret <4 x double> %3
 }
 
 define <4 x double> @undef_test_permvar_df_256(<4 x double> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_df_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   ret <4 x double> %1
 }
 
 define <4 x double> @undef_test_permvar_df_256_mask(<4 x double> %a0, <4 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_df_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[EXTRACT:%.*]] = shufflevector <8 x i1> [[TMP2]], <8 x i1> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <4 x i1> [[EXTRACT]], <4 x double> [[TMP1]], <4 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <4 x double> [[TMP3]]
 ;
   %1 = call <4 x double> @llvm.x86.avx512.permvar.df.256(<4 x double> %a0, <4 x i64> <i64 undef, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %extract = shufflevector <8 x i1> %2, <8 x i1> %2, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
 }
 
 define <16 x i32> @zero_test_permvar_si_512(<16 x i32> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_si_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x i32> [[TMP1]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> zeroinitializer)
   ret <16 x i32> %1
 }
 
 define <16 x i32> @zero_test_permvar_si_512_mask(<16 x i32> %a0, <16 x i32> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_si_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i32> [[TMP1]], <16 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
 }
 
 define <16 x i32> @shuffle_test_permvar_si_512(<16 x i32> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i32> [[TMP1]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x i32> %1
 }
 
 define <16 x i32> @shuffle_test_permvar_si_512_mask(<16 x i32> %a0, <16 x i32> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_si_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i32> [[TMP1]], <16 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
 }
 
 define <16 x i32> @undef_test_permvar_si_512(<16 x i32> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_si_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i32> [[TMP1]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x i32> %1
 }
 
 define <16 x i32> @undef_test_permvar_si_512_mask(<16 x i32> %a0, <16 x i32> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_si_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i32> [[A0:%.*]], <16 x i32> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i32> [[TMP1]], <16 x i32> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = call <16 x i32> @llvm.x86.avx512.permvar.si.512(<16 x i32> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i32> %1, <16 x i32> %passthru
   ret <16 x i32> %3
;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
 }
 
 define <16 x float> @zero_test_permvar_sf_512(<16 x float> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_sf_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> zeroinitializer)
   ret <16 x float> %1
 }
 
 define <16 x float> @zero_test_permvar_sf_512_mask(<16 x float> %a0, <16 x float> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_sf_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x float> [[TMP1]], <16 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x float> [[TMP3]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
 }
 
 define <16 x float> @shuffle_test_permvar_sf_512(<16 x float> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %1
 }
 
 define <16 x float> @shuffle_test_permvar_sf_512_mask(<16 x float> %a0, <16 x float> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_sf_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x float> [[TMP1]], <16 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x float> [[TMP3]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
 }
 
 define <16 x float> @undef_test_permvar_sf_512(<16 x float> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_sf_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %1
 }
 
 define <16 x float> @undef_test_permvar_sf_512_mask(<16 x float> %a0, <16 x float> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_sf_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[A0:%.*]], <16 x float> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x float> [[TMP1]], <16 x float> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x float> [[TMP3]]
 ;
   %1 = call <16 x float> @llvm.x86.avx512.permvar.sf.512(<16 x float> %a0, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x float> %1, <16 x float> %passthru
   ret <16 x float> %3
;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
 }
 
 define <8 x i64> @zero_test_permvar_di_512(<8 x i64> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_di_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i64> [[TMP1]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> zeroinitializer)
   ret <8 x i64> %1
 }
 
 define <8 x i64> @zero_test_permvar_di_512_mask(<8 x i64> %a0, <8 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_di_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i64> [[TMP1]], <8 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
 }
 
 define <8 x i64> @shuffle_test_permvar_di_512(<8 x i64> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i64> [[TMP1]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x i64> %1
 }
 
 define <8 x i64> @shuffle_test_permvar_di_512_mask(<8 x i64> %a0, <8 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_di_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i64> [[TMP1]], <8 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
 }
 
 define <8 x i64> @undef_test_permvar_di_512(<8 x i64> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_di_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i64> [[TMP1]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x i64> %1
 }
 
 define <8 x i64> @undef_test_permvar_di_512_mask(<8 x i64> %a0, <8 x i64> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_di_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i64> [[A0:%.*]], <8 x i64> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i64> [[TMP1]], <8 x i64> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = call <8 x i64> @llvm.x86.avx512.permvar.di.512(<8 x i64> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i64> %1, <8 x i64> %passthru
   ret <8 x i64> %3
;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
 }
 
 define <8 x double> @zero_test_permvar_df_512(<8 x double> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_df_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> zeroinitializer)
   ret <8 x double> %1
 }
 
 define <8 x double> @zero_test_permvar_df_512_mask(<8 x double> %a0, <8 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_df_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x double> [[TMP1]], <8 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x double> [[TMP3]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
 }
 
 define <8 x double> @shuffle_test_permvar_df_512(<8 x double> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x double> %1
 }
 
 define <8 x double> @shuffle_test_permvar_df_512_mask(<8 x double> %a0, <8 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_df_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x double> [[TMP1]], <8 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x double> [[TMP3]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 7, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
 }
 
 define <8 x double> @undef_test_permvar_df_512(<8 x double> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_df_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   ret <8 x double> %1
 }
 
 define <8 x double> @undef_test_permvar_df_512_mask(<8 x double> %a0, <8 x double> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_df_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[A0:%.*]], <8 x double> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x double> [[TMP1]], <8 x double> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x double> [[TMP3]]
 ;
   %1 = call <8 x double> @llvm.x86.avx512.permvar.df.512(<8 x double> %a0, <8 x i64> <i64 undef, i64 6, i64 5, i64 4, i64 3, i64 2, i64 1, i64 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x double> %1, <8 x double> %passthru
   ret <8 x double> %3
;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
 }
 
 define <8 x i16> @zero_test_permvar_hi_128(<8 x i16> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_hi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <8 x i16> [[TMP1]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> zeroinitializer)
   ret <8 x i16> %1
 }
 
 define <8 x i16> @zero_test_permvar_hi_128_mask(<8 x i16> %a0, <8 x i16> %passthru, i8 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_hi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i16> [[TMP1]], <8 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> zeroinitializer)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
 }
 
 define <8 x i16> @shuffle_test_permvar_hi_128(<8 x i16> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i16> [[TMP1]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <8 x i16> %1
 }
 
 define <8 x i16> @shuffle_test_permvar_hi_128_mask(<8 x i16> %a0, <8 x i16> %passthru, i8 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i16> [[TMP1]], <8 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
 }
 
 define <8 x i16> @undef_test_permvar_hi_128(<8 x i16> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_hi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <8 x i16> [[TMP1]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 undef, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <8 x i16> %1
 }
 
 define <8 x i16> @undef_test_permvar_hi_128_mask(<8 x i16> %a0, <8 x i16> %passthru, i8 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_hi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> undef, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x i16> [[A0:%.*]], <8 x i16> poison, <8 x i32> <i32 undef, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8 [[MASK:%.*]] to <8 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <8 x i1> [[TMP2]], <8 x i16> [[TMP1]], <8 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = call <8 x i16> @llvm.x86.avx512.permvar.hi.128(<8 x i16> %a0, <8 x i16> <i16 undef, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i8 %mask to <8 x i1>
   %3 = select <8 x i1> %2, <8 x i16> %1, <8 x i16> %passthru
   ret <8 x i16> %3
;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7, i16 8, i16 9, i16 10, i16 11, i16 12, i16 13, i16 14, i16 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
 }
 
 define <16 x i16> @zero_test_permvar_hi_256(<16 x i16> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_hi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x i16> [[TMP1]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> zeroinitializer)
   ret <16 x i16> %1
 }
 
 define <16 x i16> @zero_test_permvar_hi_256_mask(<16 x i16> %a0, <16 x i16> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_hi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i16> [[TMP1]], <16 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
 }
 
 define <16 x i16> @shuffle_test_permvar_hi_256(<16 x i16> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i16> [[TMP1]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <16 x i16> %1
 }
 
 define <16 x i16> @shuffle_test_permvar_hi_256_mask(<16 x i16> %a0, <16 x i16> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i16> [[TMP1]], <16 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
 }
 
 define <16 x i16> @undef_test_permvar_hi_256(<16 x i16> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_hi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i16> [[TMP1]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 undef, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <16 x i16> %1
 }
 
 define <16 x i16> @undef_test_permvar_hi_256_mask(<16 x i16> %a0, <16 x i16> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_hi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i16> [[A0:%.*]], <16 x i16> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i16> [[TMP1]], <16 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = call <16 x i16> @llvm.x86.avx512.permvar.hi.256(<16 x i16> %a0, <16 x i16> <i16 undef, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i16> %1, <16 x i16> %passthru
   ret <16 x i16> %3
;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7, i16 8, i16 9, i16 10, i16 11, i16 12, i16 13, i16 14, i16 15, i16 16, i16 17, i16 18, i16 19, i16 20, i16 21, i16 22, i16 23, i16 24, i16 25, i16 26, i16 27, i16 28, i16 29, i16 30, i16 31>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
 }
 
 define <32 x i16> @zero_test_permvar_hi_512(<32 x i16> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_hi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <32 x i16> [[TMP1]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> zeroinitializer)
   ret <32 x i16> %1
 }
 
 define <32 x i16> @zero_test_permvar_hi_512_mask(<32 x i16> %a0, <32 x i16> %passthru, i32 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_hi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i16> [[TMP1]], <32 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> zeroinitializer)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
 }
 
 define <32 x i16> @shuffle_test_permvar_hi_512(<32 x i16> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i16> [[TMP1]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 31, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <32 x i16> %1
 }
 
 define <32 x i16> @shuffle_test_permvar_hi_512_mask(<32 x i16> %a0, <32 x i16> %passthru, i32 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_hi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i16> [[TMP1]], <32 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 31, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
 }
 
 define <32 x i16> @undef_test_permvar_hi_512(<32 x i16> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_hi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i16> [[TMP1]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 undef, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   ret <32 x i16> %1
 }
 
 define <32 x i16> @undef_test_permvar_hi_512_mask(<32 x i16> %a0, <32 x i16> %passthru, i32 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_hi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i16> [[A0:%.*]], <32 x i16> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i16> [[TMP1]], <32 x i16> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = call <32 x i16> @llvm.x86.avx512.permvar.hi.512(<32 x i16> %a0, <32 x i16> <i16 undef, i16 30, i16 29, i16 28, i16 27, i16 26, i16 25, i16 24, i16 23, i16 22, i16 21, i16 20, i16 19, i16 18, i16 17, i16 16, i16 15, i16 14, i16 13, i16 12, i16 11, i16 10, i16 9, i16 8, i16 7, i16 6, i16 5, i16 4, i16 3, i16 2, i16 1, i16 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i16> %1, <32 x i16> %passthru
   ret <32 x i16> %3
;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
 }
 
 define <16 x i8> @zero_test_permvar_qi_128(<16 x i8> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_qi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <16 x i8> [[TMP1]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> zeroinitializer)
   ret <16 x i8> %1
 }
 
 define <16 x i8> @zero_test_permvar_qi_128_mask(<16 x i8> %a0, <16 x i8> %passthru, i16 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_qi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i8> [[TMP1]], <16 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i8> [[TMP3]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> zeroinitializer)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
 }
 
 define <16 x i8> @shuffle_test_permvar_qi_128(<16 x i8> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i8> [[TMP1]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <16 x i8> %1
 }
 
 define <16 x i8> @shuffle_test_permvar_qi_128_mask(<16 x i8> %a0, <16 x i8> %passthru, i16 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i8> [[TMP1]], <16 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i8> [[TMP3]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
 }
 
 define <16 x i8> @undef_test_permvar_qi_128(<16 x i8> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_qi_128(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <16 x i8> [[TMP1]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 undef, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <16 x i8> %1
 }
 
 define <16 x i8> @undef_test_permvar_qi_128_mask(<16 x i8> %a0, <16 x i8> %passthru, i16 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_qi_128_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> undef, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x i8> [[A0:%.*]], <16 x i8> poison, <16 x i32> <i32 undef, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i16 [[MASK:%.*]] to <16 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <16 x i1> [[TMP2]], <16 x i8> [[TMP1]], <16 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <16 x i8> [[TMP3]]
 ;
   %1 = call <16 x i8> @llvm.x86.avx512.permvar.qi.128(<16 x i8> %a0, <16 x i8> <i8 undef, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i16 %mask to <16 x i1>
   %3 = select <16 x i1> %2, <16 x i8> %1, <16 x i8> %passthru
   ret <16 x i8> %3
;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15, i8 16, i8 17, i8 18, i8 19, i8 20, i8 21, i8 22, i8 23, i8 24, i8 25, i8 26, i8 27, i8 28, i8 29, i8 30, i8 31>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
 }
 
 define <32 x i8> @zero_test_permvar_qi_256(<32 x i8> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_qi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <32 x i8> [[TMP1]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> zeroinitializer)
   ret <32 x i8> %1
 }
 
 define <32 x i8> @zero_test_permvar_qi_256_mask(<32 x i8> %a0, <32 x i8> %passthru, i32 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_qi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i8> [[TMP1]], <32 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i8> [[TMP3]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> zeroinitializer)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
 }
 
 define <32 x i8> @shuffle_test_permvar_qi_256(<32 x i8> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i8> [[TMP1]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <32 x i8> %1
 }
 
 define <32 x i8> @shuffle_test_permvar_qi_256_mask(<32 x i8> %a0, <32 x i8> %passthru, i32 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i8> [[TMP1]], <32 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i8> [[TMP3]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
 }
 
 define <32 x i8> @undef_test_permvar_qi_256(<32 x i8> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_qi_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <32 x i8> [[TMP1]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 undef, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <32 x i8> %1
 }
 
 define <32 x i8> @undef_test_permvar_qi_256_mask(<32 x i8> %a0, <32 x i8> %passthru, i32 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_qi_256_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> undef, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <32 x i8> [[A0:%.*]], <32 x i8> poison, <32 x i32> <i32 undef, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i32 [[MASK:%.*]] to <32 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <32 x i1> [[TMP2]], <32 x i8> [[TMP1]], <32 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <32 x i8> [[TMP3]]
 ;
   %1 = call <32 x i8> @llvm.x86.avx512.permvar.qi.256(<32 x i8> %a0, <32 x i8> <i8 undef, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i32 %mask to <32 x i1>
   %3 = select <32 x i1> %2, <32 x i8> %1, <32 x i8> %passthru
   ret <32 x i8> %3
;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15, i8 16, i8 17, i8 18, i8 19, i8 20, i8 21, i8 22, i8 23, i8 24, i8 25, i8 26, i8 27, i8 28, i8 29, i8 30, i8 31, i8 32, i8 33, i8 34, i8 35, i8 36, i8 37, i8 38, i8 39, i8 40, i8 41, i8 42, i8 43, i8 44, i8 45, i8 46, i8 47, i8 48, i8 49, i8 50, i8 51, i8 52, i8 53, i8 54, i8 55, i8 56, i8 57, i8 58, i8 59, i8 60, i8 61, i8 62, i8 63>)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3
 }
 
 define <64 x i8> @zero_test_permvar_qi_512(<64 x i8> %a0) {
 ; CHECK-LABEL: @zero_test_permvar_qi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <64 x i8> [[TMP1]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> zeroinitializer)
   ret <64 x i8> %1
 }
 
 define <64 x i8> @zero_test_permvar_qi_512_mask(<64 x i8> %a0, <64 x i8> %passthru, i64 %mask) {
 ; CHECK-LABEL: @zero_test_permvar_qi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i64 [[MASK:%.*]] to <64 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <64 x i1> [[TMP2]], <64 x i8> [[TMP1]], <64 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <64 x i8> [[TMP3]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> zeroinitializer)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3
 }
 
 define <64 x i8> @shuffle_test_permvar_qi_512(<64 x i8> %a0) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <64 x i8> [[TMP1]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 63, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <64 x i8> %1
 }
 
 define <64 x i8> @shuffle_test_permvar_qi_512_mask(<64 x i8> %a0, <64 x i8> %passthru, i64 %mask) {
 ; CHECK-LABEL: @shuffle_test_permvar_qi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 63, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i64 [[MASK:%.*]] to <64 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <64 x i1> [[TMP2]], <64 x i8> [[TMP1]], <64 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <64 x i8> [[TMP3]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 63, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3
 }
 
 define <64 x i8> @undef_test_permvar_qi_512(<64 x i8> %a0) {
 ; CHECK-LABEL: @undef_test_permvar_qi_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <64 x i8> [[TMP1]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 undef, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   ret <64 x i8> %1
 }
 
 define <64 x i8> @undef_test_permvar_qi_512_mask(<64 x i8> %a0, <64 x i8> %passthru, i64 %mask) {
 ; CHECK-LABEL: @undef_test_permvar_qi_512_mask(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> undef, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <64 x i8> [[A0:%.*]], <64 x i8> poison, <64 x i32> <i32 undef, i32 62, i32 61, i32 60, i32 59, i32 58, i32 57, i32 56, i32 55, i32 54, i32 53, i32 52, i32 51, i32 50, i32 49, i32 48, i32 47, i32 46, i32 45, i32 44, i32 43, i32 42, i32 41, i32 40, i32 39, i32 38, i32 37, i32 36, i32 35, i32 34, i32 33, i32 32, i32 31, i32 30, i32 29, i32 28, i32 27, i32 26, i32 25, i32 24, i32 23, i32 22, i32 21, i32 20, i32 19, i32 18, i32 17, i32 16, i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i64 [[MASK:%.*]] to <64 x i1>
 ; CHECK-NEXT:    [[TMP3:%.*]] = select <64 x i1> [[TMP2]], <64 x i8> [[TMP1]], <64 x i8> [[PASSTHRU:%.*]]
 ; CHECK-NEXT:    ret <64 x i8> [[TMP3]]
 ;
   %1 = call <64 x i8> @llvm.x86.avx512.permvar.qi.512(<64 x i8> %a0, <64 x i8> <i8 undef, i8 62, i8 61, i8 60, i8 59, i8 58, i8 57, i8 56, i8 55, i8 54, i8 53, i8 52, i8 51, i8 50, i8 49, i8 48, i8 47, i8 46, i8 45, i8 44, i8 43, i8 42, i8 41, i8 40, i8 39, i8 38, i8 37, i8 36, i8 35, i8 34, i8 33, i8 32, i8 31, i8 30, i8 29, i8 28, i8 27, i8 26, i8 25, i8 24, i8 23, i8 22, i8 21, i8 20, i8 19, i8 18, i8 17, i8 16, i8 15, i8 14, i8 13, i8 12, i8 11, i8 10, i8 9, i8 8, i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
   %2 = bitcast i64 %mask to <64 x i1>
   %3 = select <64 x i1> %2, <64 x i8> %1, <64 x i8> %passthru
   ret <64 x i8> %3

llvm/test/Transforms/InstCombine/X86/x86-vector-shifts-inseltpoison.ll

 
 ;
 ; Vector Masked Shift Amounts
 ;
 
 define <8 x i16> @sse2_psra_w_128_masked(<8 x i16> %v, <8 x i16> %a) {
 ; CHECK-LABEL: @sse2_psra_w_128_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <8 x i16> [[A:%.*]], <i16 15, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = ashr <8 x i16> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = and <8 x i16> %a, <i16 15, i16 0, i16 0, i16 0, i16 poison, i16 poison, i16 poison, i16 poison>
   %2 = tail call <8 x i16> @llvm.x86.sse2.psra.w(<8 x i16> %v, <8 x i16> %1)
   ret <8 x i16> %2
 }
 
 define <8 x i32> @avx2_psra_d_256_masked(<8 x i32> %v, <4 x i32> %a) {
 ; CHECK-LABEL: @avx2_psra_d_256_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <4 x i32> [[A:%.*]], <i32 31, i32 poison, i32 poison, i32 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = ashr <8 x i32> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = and <4 x i32> %a, <i32 31, i32 0, i32 poison, i32 poison>
   %2 = tail call <8 x i32> @llvm.x86.avx2.psra.d(<8 x i32> %v, <4 x i32> %1)
   ret <8 x i32> %2
 }
 
 define <8 x i64> @avx512_psra_q_512_masked(<8 x i64> %v, <2 x i64> %a) {
 ; CHECK-LABEL: @avx512_psra_q_512_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i64> [[A:%.*]], <i64 63, i64 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = ashr <8 x i64> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = and <2 x i64> %a, <i64 63, i64 poison>
   %2 = tail call <8 x i64> @llvm.x86.avx512.psra.q.512(<8 x i64> %v, <2 x i64> %1)
   ret <8 x i64> %2
 }
 
 define <4 x i32> @sse2_psrl_d_128_masked(<4 x i32> %v, <4 x i32> %a) {
 ; CHECK-LABEL: @sse2_psrl_d_128_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <4 x i32> [[A:%.*]], <i32 31, i32 poison, i32 poison, i32 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = lshr <4 x i32> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <4 x i32> [[TMP3]]
 ;
   %1 = and <4 x i32> %a, <i32 31, i32 0, i32 poison, i32 poison>
   %2 = tail call <4 x i32> @llvm.x86.sse2.psrl.d(<4 x i32> %v, <4 x i32> %1)
   ret <4 x i32> %2
 }
 
 define <4 x i64> @avx2_psrl_q_256_masked(<4 x i64> %v, <2 x i64> %a) {
 ; CHECK-LABEL: @avx2_psrl_q_256_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i64> [[A:%.*]], <i64 63, i64 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = lshr <4 x i64> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = and <2 x i64> %a, <i64 63, i64 poison>
   %2 = tail call <4 x i64> @llvm.x86.avx2.psrl.q(<4 x i64> %v, <2 x i64> %1)
   ret <4 x i64> %2
 }
 
 define <32 x i16> @avx512_psrl_w_512_masked(<32 x i16> %v, <8 x i16> %a) {
 ; CHECK-LABEL: @avx512_psrl_w_512_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <8 x i16> [[A:%.*]], <i16 15, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = lshr <32 x i16> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = and <8 x i16> %a, <i16 15, i16 0, i16 0, i16 0, i16 poison, i16 poison, i16 poison, i16 poison>
   %2 = tail call <32 x i16> @llvm.x86.avx512.psrl.w.512(<32 x i16> %v, <8 x i16> %1)
   ret <32 x i16> %2
 }
 
 define <2 x i64> @sse2_psll_q_128_masked(<2 x i64> %v, <2 x i64> %a) {
 ; CHECK-LABEL: @sse2_psll_q_128_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i64> [[A:%.*]], <i64 63, i64 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> undef, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <2 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = shl <2 x i64> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i64> [[TMP3]]
 ;
   %1 = and <2 x i64> %a, <i64 63, i64 poison>
   %2 = tail call <2 x i64> @llvm.x86.sse2.psll.q(<2 x i64> %v, <2 x i64> %1)
   ret <2 x i64> %2
 }
 
 define <16 x i16> @avx2_psll_w_256_masked(<16 x i16> %v, <8 x i16> %a) {
 ; CHECK-LABEL: @avx2_psll_w_256_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <8 x i16> [[A:%.*]], <i16 15, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = shl <16 x i16> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = and <8 x i16> %a, <i16 15, i16 0, i16 0, i16 0, i16 poison, i16 poison, i16 poison, i16 poison>
   %2 = tail call <16 x i16> @llvm.x86.avx2.psll.w(<16 x i16> %v, <8 x i16> %1)
   ret <16 x i16> %2
 }
 
 define <16 x i32> @avx512_psll_d_512_masked(<16 x i32> %v, <4 x i32> %a) {
 ; CHECK-LABEL: @avx512_psll_d_512_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <4 x i32> [[A:%.*]], <i32 31, i32 poison, i32 poison, i32 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = shl <16 x i32> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = and <4 x i32> %a, <i32 31, i32 0, i32 poison, i32 poison>
   %2 = tail call <16 x i32> @llvm.x86.avx512.psll.d.512(<16 x i32> %v, <4 x i32> %1)
   ret <16 x i32> %2
 }
 

llvm/test/Transforms/InstCombine/X86/x86-vector-shifts.ll

 
 ;
 ; Vector Masked Shift Amounts
 ;
 
 define <8 x i16> @sse2_psra_w_128_masked(<8 x i16> %v, <8 x i16> %a) {
 ; CHECK-LABEL: @sse2_psra_w_128_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <8 x i16> [[A:%.*]], <i16 15, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = ashr <8 x i16> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <8 x i16> [[TMP3]]
 ;
   %1 = and <8 x i16> %a, <i16 15, i16 0, i16 0, i16 0, i16 undef, i16 undef, i16 undef, i16 undef>
   %2 = tail call <8 x i16> @llvm.x86.sse2.psra.w(<8 x i16> %v, <8 x i16> %1)
   ret <8 x i16> %2
 }
 
 define <8 x i32> @avx2_psra_d_256_masked(<8 x i32> %v, <4 x i32> %a) {
 ; CHECK-LABEL: @avx2_psra_d_256_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <4 x i32> [[A:%.*]], <i32 31, i32 poison, i32 poison, i32 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = ashr <8 x i32> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <8 x i32> [[TMP3]]
 ;
   %1 = and <4 x i32> %a, <i32 31, i32 0, i32 undef, i32 undef>
   %2 = tail call <8 x i32> @llvm.x86.avx2.psra.d(<8 x i32> %v, <4 x i32> %1)
   ret <8 x i32> %2
 }
 
 define <8 x i64> @avx512_psra_q_512_masked(<8 x i64> %v, <2 x i64> %a) {
 ; CHECK-LABEL: @avx512_psra_q_512_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i64> [[A:%.*]], <i64 63, i64 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> undef, <8 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <8 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = ashr <8 x i64> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <8 x i64> [[TMP3]]
 ;
   %1 = and <2 x i64> %a, <i64 63, i64 undef>
   %2 = tail call <8 x i64> @llvm.x86.avx512.psra.q.512(<8 x i64> %v, <2 x i64> %1)
   ret <8 x i64> %2
 }
 
 define <4 x i32> @sse2_psrl_d_128_masked(<4 x i32> %v, <4 x i32> %a) {
 ; CHECK-LABEL: @sse2_psrl_d_128_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <4 x i32> [[A:%.*]], <i32 31, i32 poison, i32 poison, i32 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = lshr <4 x i32> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <4 x i32> [[TMP3]]
 ;
   %1 = and <4 x i32> %a, <i32 31, i32 0, i32 undef, i32 undef>
   %2 = tail call <4 x i32> @llvm.x86.sse2.psrl.d(<4 x i32> %v, <4 x i32> %1)
   ret <4 x i32> %2
 }
 
 define <4 x i64> @avx2_psrl_q_256_masked(<4 x i64> %v, <2 x i64> %a) {
 ; CHECK-LABEL: @avx2_psrl_q_256_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i64> [[A:%.*]], <i64 63, i64 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = lshr <4 x i64> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <4 x i64> [[TMP3]]
 ;
   %1 = and <2 x i64> %a, <i64 63, i64 undef>
   %2 = tail call <4 x i64> @llvm.x86.avx2.psrl.q(<4 x i64> %v, <2 x i64> %1)
   ret <4 x i64> %2
 }
 
 define <32 x i16> @avx512_psrl_w_512_masked(<32 x i16> %v, <8 x i16> %a) {
 ; CHECK-LABEL: @avx512_psrl_w_512_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <8 x i16> [[A:%.*]], <i16 15, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> undef, <32 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> poison, <32 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = lshr <32 x i16> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <32 x i16> [[TMP3]]
 ;
   %1 = and <8 x i16> %a, <i16 15, i16 0, i16 0, i16 0, i16 undef, i16 undef, i16 undef, i16 undef>
   %2 = tail call <32 x i16> @llvm.x86.avx512.psrl.w.512(<32 x i16> %v, <8 x i16> %1)
   ret <32 x i16> %2
 }
 
 define <2 x i64> @sse2_psll_q_128_masked(<2 x i64> %v, <2 x i64> %a) {
 ; CHECK-LABEL: @sse2_psll_q_128_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i64> [[A:%.*]], <i64 63, i64 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> undef, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <2 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = shl <2 x i64> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <2 x i64> [[TMP3]]
 ;
   %1 = and <2 x i64> %a, <i64 63, i64 undef>
   %2 = tail call <2 x i64> @llvm.x86.sse2.psll.q(<2 x i64> %v, <2 x i64> %1)
   ret <2 x i64> %2
 }
 
 define <16 x i16> @avx2_psll_w_256_masked(<16 x i16> %v, <8 x i16> %a) {
 ; CHECK-LABEL: @avx2_psll_w_256_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <8 x i16> [[A:%.*]], <i16 15, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison, i16 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <8 x i16> [[TMP1]], <8 x i16> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = shl <16 x i16> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <16 x i16> [[TMP3]]
 ;
   %1 = and <8 x i16> %a, <i16 15, i16 0, i16 0, i16 0, i16 undef, i16 undef, i16 undef, i16 undef>
   %2 = tail call <16 x i16> @llvm.x86.avx2.psll.w(<16 x i16> %v, <8 x i16> %1)
   ret <16 x i16> %2
 }
 
 define <16 x i32> @avx512_psll_d_512_masked(<16 x i32> %v, <4 x i32> %a) {
 ; CHECK-LABEL: @avx512_psll_d_512_masked(
 ; CHECK-NEXT:    [[TMP1:%.*]] = and <4 x i32> [[A:%.*]], <i32 31, i32 poison, i32 poison, i32 poison>
-; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> undef, <16 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP2:%.*]] = shufflevector <4 x i32> [[TMP1]], <4 x i32> poison, <16 x i32> zeroinitializer
 ; CHECK-NEXT:    [[TMP3:%.*]] = shl <16 x i32> [[V:%.*]], [[TMP2]]
 ; CHECK-NEXT:    ret <16 x i32> [[TMP3]]
 ;
   %1 = and <4 x i32> %a, <i32 31, i32 0, i32 undef, i32 undef>
   %2 = tail call <16 x i32> @llvm.x86.avx512.psll.d.512(<16 x i32> %v, <4 x i32> %1)
   ret <16 x i32> %2
 }
 

llvm/test/Transforms/InstCombine/X86/x86-vpermil-inseltpoison.ll

;
   ret <8 x double> %a
 }
 
 ; Instcombine should be able to fold the following byte shuffle to a builtin shufflevector
 ; with a shuffle mask of all zeroes.
 
 define <4 x float> @zero_test_vpermilvar_ps_zero(<4 x float> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_ps_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %a = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %v, <4 x i32> zeroinitializer)
   ret <4 x float> %a
 }
 
 define <8 x float> @zero_test_vpermilvar_ps_256_zero(<8 x float> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_ps_256_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> undef, <8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> poison, <8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %v, <8 x i32> zeroinitializer)
   ret <8 x float> %a
 }
 
 define <16 x float> @zero_test_vpermilvar_ps_512_zero(<16 x float> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_ps_512_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> undef, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4, i32 8, i32 8, i32 8, i32 8, i32 12, i32 12, i32 12, i32 12>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> poison, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4, i32 8, i32 8, i32 8, i32 8, i32 12, i32 12, i32 12, i32 12>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %a = tail call <16 x float> @llvm.x86.avx512.vpermilvar.ps.512(<16 x float> %v, <16 x i32> zeroinitializer)
   ret <16 x float> %a
 }
 
 define <2 x double> @zero_test_vpermilvar_pd_zero(<2 x double> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_pd_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> undef, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> poison, <2 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <2 x double> [[TMP1]]
 ;
   %a = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %v, <2 x i64> zeroinitializer)
   ret <2 x double> %a
 }
 
 define <4 x double> @zero_test_vpermilvar_pd_256_zero(<4 x double> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_pd_256_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> undef, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> poison, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %a = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %v, <4 x i64> zeroinitializer)
   ret <4 x double> %a
 }
 
 define <8 x double> @zero_test_vpermilvar_pd_512_zero(<8 x double> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_pd_512_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> undef, <8 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> poison, <8 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %a = tail call <8 x double> @llvm.x86.avx512.vpermilvar.pd.512(<8 x double> %v, <8 x i64> zeroinitializer)
   ret <8 x double> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles.
 
 define <4 x float> @test_vpermilvar_ps(<4 x float> %v) {
 ; CHECK-LABEL: @test_vpermilvar_ps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %a = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %v, <4 x i32> <i32 3, i32 2, i32 1, i32 0>)
   ret <4 x float> %a
 }
 
 define <8 x float> @test_vpermilvar_ps_256(<8 x float> %v) {
 ; CHECK-LABEL: @test_vpermilvar_ps_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> undef, <8 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> poison, <8 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %v, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 define <16 x float> @test_vpermilvar_ps_512(<16 x float> %v) {
 ; CHECK-LABEL: @test_vpermilvar_ps_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> undef, <16 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4, i32 11, i32 10, i32 9, i32 8, i32 15, i32 14, i32 13, i32 12>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> poison, <16 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4, i32 11, i32 10, i32 9, i32 8, i32 15, i32 14, i32 13, i32 12>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %a = tail call <16 x float> @llvm.x86.avx512.vpermilvar.ps.512(<16 x float> %v, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %a
 }
 
 define <2 x double> @test_vpermilvar_pd(<2 x double> %v) {
 ; CHECK-LABEL: @test_vpermilvar_pd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> undef, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> poison, <2 x i32> <i32 1, i32 0>
 ; CHECK-NEXT:    ret <2 x double> [[TMP1]]
 ;
   %a = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %v, <2 x i64> <i64 2, i64 0>)
   ret <2 x double> %a
 }
 
 define <4 x double> @test_vpermilvar_pd_256(<4 x double> %v) {
 ; CHECK-LABEL: @test_vpermilvar_pd_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %a = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %v, <4 x i64> <i64 3, i64 1, i64 2, i64 0>)
   ret <4 x double> %a
 }
 
 define <8 x double> @test_vpermilvar_pd_512(<8 x double> %v) {
 ; CHECK-LABEL: @test_vpermilvar_pd_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> undef, <8 x i32> <i32 1, i32 0, i32 3, i32 2, i32 5, i32 4, i32 7, i32 6>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> poison, <8 x i32> <i32 1, i32 0, i32 3, i32 2, i32 5, i32 4, i32 7, i32 6>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %a = tail call <8 x double> @llvm.x86.avx512.vpermilvar.pd.512(<8 x double> %v, <8 x i64> <i64 3, i64 1, i64 2, i64 0, i64 7, i64 5, i64 6, i64 4>)
   ret <8 x double> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles with poison mask elements.
 
 define <4 x float> @poison_test_vpermilvar_ps(<4 x float> %v) {
 ; CHECK-LABEL: @poison_test_vpermilvar_ps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 undef>
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %a = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %v, <4 x i32> <i32 poison, i32 2, i32 1, i32 poison>)
   ret <4 x float> %a
 }
 
 define <8 x float> @poison_test_vpermilvar_ps_256(<8 x float> %v) {
 ; CHECK-LABEL: @poison_test_vpermilvar_ps_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %v, <8 x i32> <i32 poison, i32 6, i32 5, i32 poison, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 define <16 x float> @poison_test_vpermilvar_ps_512(<16 x float> %v) {
 ; CHECK-LABEL: @poison_test_vpermilvar_ps_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> undef, <16 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4, i32 undef, i32 10, i32 9, i32 undef, i32 15, i32 14, i32 13, i32 12>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> poison, <16 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4, i32 undef, i32 10, i32 9, i32 undef, i32 15, i32 14, i32 13, i32 12>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %a = tail call <16 x float> @llvm.x86.avx512.vpermilvar.ps.512(<16 x float> %v, <16 x i32> <i32 poison, i32 6, i32 5, i32 poison, i32 3, i32 2, i32 1, i32 0, i32 poison, i32 6, i32 5, i32 poison, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %a
 }
 
 define <2 x double> @poison_test_vpermilvar_pd(<2 x double> %v) {
 ; CHECK-LABEL: @poison_test_vpermilvar_pd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> undef, <2 x i32> <i32 undef, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> poison, <2 x i32> <i32 undef, i32 0>
 ; CHECK-NEXT:    ret <2 x double> [[TMP1]]
 ;
   %a = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %v, <2 x i64> <i64 poison, i64 0>)
   ret <2 x double> %a
 }
 
 define <4 x double> @poison_test_vpermilvar_pd_256(<4 x double> %v) {
 ; CHECK-LABEL: @poison_test_vpermilvar_pd_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> undef, <4 x i32> <i32 undef, i32 0, i32 3, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> poison, <4 x i32> <i32 undef, i32 0, i32 3, i32 undef>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %a = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %v, <4 x i64> <i64 poison, i64 1, i64 2, i64 poison>)
   ret <4 x double> %a
 }
 
 define <8 x double> @poison_test_vpermilvar_pd_512(<8 x double> %v) {
 ; CHECK-LABEL: @poison_test_vpermilvar_pd_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> undef, <8 x i32> <i32 undef, i32 0, i32 3, i32 undef, i32 undef, i32 4, i32 7, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> poison, <8 x i32> <i32 undef, i32 0, i32 3, i32 undef, i32 undef, i32 4, i32 7, i32 undef>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %a = tail call <8 x double> @llvm.x86.avx512.vpermilvar.pd.512(<8 x double> %v, <8 x i64> <i64 poison, i64 1, i64 2, i64 poison, i64 poison, i64 1, i64 2, i64 poison>)
   ret <8 x double> %a
 }
 
 ; Simplify demanded elts
 
 define <4 x float> @elts_test_vpermilvar_ps(<4 x float> %a0, i32 %a1) {
 ; CHECK-LABEL: @elts_test_vpermilvar_ps(
 ; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[A0:%.*]], <4 x float> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %1 = insertelement <4 x i32> <i32 0, i32 1, i32 2, i32 3>, i32 %a1, i32 3
   %2 = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %a0, <4 x i32> %1)
   %3 = shufflevector <4 x float> %2, <4 x float> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 poison>
   ret <4 x float> %3
 }
 
 define <8 x float> @elts_test_vpermilvar_ps_256(<8 x float> %a0, <8 x i32> %a1) {
 ; CHECK-LABEL: @elts_test_vpermilvar_ps_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 0, i32 undef, i32 1, i32 undef, i32 6, i32 undef, i32 7>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 0, i32 undef, i32 1, i32 undef, i32 6, i32 undef, i32 7>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = shufflevector <8 x i32> %a1, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 3, i32 2, i32 1, i32 0>, <8 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11>
   %2 = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %a0, <8 x i32> %1)
   %3 = shufflevector <8 x float> %2, <8 x float> poison, <8 x i32> <i32 poison, i32 1, i32 poison, i32 3, i32 poison, i32 5, i32 poison, i32 7>
   ret <8 x float> %3
 }
 
;
   %1 = insertelement <2 x i64> <i64 0, i64 2>, i64 %a1, i32 1
   %2 = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %a0, <2 x i64> %1)
   %3 = shufflevector <2 x double> %2, <2 x double> poison, <2 x i32> <i32 0, i32 poison>
   ret <2 x double> %3
 }
 
 define <4 x double> @elts_test_vpermilvar_pd_256(<4 x double> %a0, <4 x i64> %a1) {
 ; CHECK-LABEL: @elts_test_vpermilvar_pd_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 undef>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = shufflevector <4 x i64> <i64 0, i64 2, i64 0, i64 2>, <4 x i64> %a1, <4 x i32> <i32 1, i32 2, i32 3, i32 4>
   %2 = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %a0, <4 x i64> %1)
   %3 = shufflevector <4 x double> %2, <4 x double> poison, <4 x i32> <i32 0, i32 1, i32 2, i32 poison>
   ret <4 x double> %3
 }
 

llvm/test/Transforms/InstCombine/X86/x86-vpermil.ll

;
   ret <8 x double> %a
 }
 
 ; Instcombine should be able to fold the following byte shuffle to a builtin shufflevector
 ; with a shuffle mask of all zeroes.
 
 define <4 x float> @zero_test_vpermilvar_ps_zero(<4 x float> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_ps_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> undef, <4 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> poison, <4 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %a = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %v, <4 x i32> zeroinitializer)
   ret <4 x float> %a
 }
 
 define <8 x float> @zero_test_vpermilvar_ps_256_zero(<8 x float> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_ps_256_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> undef, <8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> poison, <8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %v, <8 x i32> zeroinitializer)
   ret <8 x float> %a
 }
 
 define <16 x float> @zero_test_vpermilvar_ps_512_zero(<16 x float> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_ps_512_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> undef, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4, i32 8, i32 8, i32 8, i32 8, i32 12, i32 12, i32 12, i32 12>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> poison, <16 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4, i32 8, i32 8, i32 8, i32 8, i32 12, i32 12, i32 12, i32 12>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %a = tail call <16 x float> @llvm.x86.avx512.vpermilvar.ps.512(<16 x float> %v, <16 x i32> zeroinitializer)
   ret <16 x float> %a
 }
 
 define <2 x double> @zero_test_vpermilvar_pd_zero(<2 x double> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_pd_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> undef, <2 x i32> zeroinitializer
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> poison, <2 x i32> zeroinitializer
 ; CHECK-NEXT:    ret <2 x double> [[TMP1]]
 ;
   %a = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %v, <2 x i64> zeroinitializer)
   ret <2 x double> %a
 }
 
 define <4 x double> @zero_test_vpermilvar_pd_256_zero(<4 x double> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_pd_256_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> undef, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> poison, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %a = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %v, <4 x i64> zeroinitializer)
   ret <4 x double> %a
 }
 
 define <8 x double> @zero_test_vpermilvar_pd_512_zero(<8 x double> %v) {
 ; CHECK-LABEL: @zero_test_vpermilvar_pd_512_zero(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> undef, <8 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> poison, <8 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %a = tail call <8 x double> @llvm.x86.avx512.vpermilvar.pd.512(<8 x double> %v, <8 x i64> zeroinitializer)
   ret <8 x double> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles.
 
 define <4 x float> @test_vpermilvar_ps(<4 x float> %v) {
 ; CHECK-LABEL: @test_vpermilvar_ps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> poison, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %a = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %v, <4 x i32> <i32 3, i32 2, i32 1, i32 0>)
   ret <4 x float> %a
 }
 
 define <8 x float> @test_vpermilvar_ps_256(<8 x float> %v) {
 ; CHECK-LABEL: @test_vpermilvar_ps_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> undef, <8 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> poison, <8 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %v, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 define <16 x float> @test_vpermilvar_ps_512(<16 x float> %v) {
 ; CHECK-LABEL: @test_vpermilvar_ps_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> undef, <16 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4, i32 11, i32 10, i32 9, i32 8, i32 15, i32 14, i32 13, i32 12>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> poison, <16 x i32> <i32 3, i32 2, i32 1, i32 0, i32 7, i32 6, i32 5, i32 4, i32 11, i32 10, i32 9, i32 8, i32 15, i32 14, i32 13, i32 12>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %a = tail call <16 x float> @llvm.x86.avx512.vpermilvar.ps.512(<16 x float> %v, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %a
 }
 
 define <2 x double> @test_vpermilvar_pd(<2 x double> %v) {
 ; CHECK-LABEL: @test_vpermilvar_pd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> undef, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> poison, <2 x i32> <i32 1, i32 0>
 ; CHECK-NEXT:    ret <2 x double> [[TMP1]]
 ;
   %a = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %v, <2 x i64> <i64 2, i64 0>)
   ret <2 x double> %a
 }
 
 define <4 x double> @test_vpermilvar_pd_256(<4 x double> %v) {
 ; CHECK-LABEL: @test_vpermilvar_pd_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 2>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %a = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %v, <4 x i64> <i64 3, i64 1, i64 2, i64 0>)
   ret <4 x double> %a
 }
 
 define <8 x double> @test_vpermilvar_pd_512(<8 x double> %v) {
 ; CHECK-LABEL: @test_vpermilvar_pd_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> undef, <8 x i32> <i32 1, i32 0, i32 3, i32 2, i32 5, i32 4, i32 7, i32 6>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> poison, <8 x i32> <i32 1, i32 0, i32 3, i32 2, i32 5, i32 4, i32 7, i32 6>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %a = tail call <8 x double> @llvm.x86.avx512.vpermilvar.pd.512(<8 x double> %v, <8 x i64> <i64 3, i64 1, i64 2, i64 0, i64 7, i64 5, i64 6, i64 4>)
   ret <8 x double> %a
 }
 
 ; Verify that instcombine is able to fold constant shuffles with undef mask elements.
 
 define <4 x float> @undef_test_vpermilvar_ps(<4 x float> %v) {
 ; CHECK-LABEL: @undef_test_vpermilvar_ps(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> undef, <4 x i32> <i32 undef, i32 2, i32 1, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[V:%.*]], <4 x float> poison, <4 x i32> <i32 undef, i32 2, i32 1, i32 undef>
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %a = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %v, <4 x i32> <i32 undef, i32 2, i32 1, i32 undef>)
   ret <4 x float> %a
 }
 
 define <8 x float> @undef_test_vpermilvar_ps_256(<8 x float> %v) {
 ; CHECK-LABEL: @undef_test_vpermilvar_ps_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[V:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %a = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %v, <8 x i32> <i32 undef, i32 6, i32 5, i32 undef, i32 3, i32 2, i32 1, i32 0>)
   ret <8 x float> %a
 }
 
 define <16 x float> @undef_test_vpermilvar_ps_512(<16 x float> %v) {
 ; CHECK-LABEL: @undef_test_vpermilvar_ps_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> undef, <16 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4, i32 undef, i32 10, i32 9, i32 undef, i32 15, i32 14, i32 13, i32 12>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <16 x float> [[V:%.*]], <16 x float> poison, <16 x i32> <i32 undef, i32 2, i32 1, i32 undef, i32 7, i32 6, i32 5, i32 4, i32 undef, i32 10, i32 9, i32 undef, i32 15, i32 14, i32 13, i32 12>
 ; CHECK-NEXT:    ret <16 x float> [[TMP1]]
 ;
   %a = tail call <16 x float> @llvm.x86.avx512.vpermilvar.ps.512(<16 x float> %v, <16 x i32> <i32 undef, i32 6, i32 5, i32 undef, i32 3, i32 2, i32 1, i32 0, i32 undef, i32 6, i32 5, i32 undef, i32 3, i32 2, i32 1, i32 0>)
   ret <16 x float> %a
 }
 
 define <2 x double> @undef_test_vpermilvar_pd(<2 x double> %v) {
 ; CHECK-LABEL: @undef_test_vpermilvar_pd(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> undef, <2 x i32> <i32 undef, i32 0>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x double> [[V:%.*]], <2 x double> poison, <2 x i32> <i32 undef, i32 0>
 ; CHECK-NEXT:    ret <2 x double> [[TMP1]]
 ;
   %a = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %v, <2 x i64> <i64 undef, i64 0>)
   ret <2 x double> %a
 }
 
 define <4 x double> @undef_test_vpermilvar_pd_256(<4 x double> %v) {
 ; CHECK-LABEL: @undef_test_vpermilvar_pd_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> undef, <4 x i32> <i32 undef, i32 0, i32 3, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[V:%.*]], <4 x double> poison, <4 x i32> <i32 undef, i32 0, i32 3, i32 undef>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %a = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %v, <4 x i64> <i64 undef, i64 1, i64 2, i64 undef>)
   ret <4 x double> %a
 }
 
 define <8 x double> @undef_test_vpermilvar_pd_512(<8 x double> %v) {
 ; CHECK-LABEL: @undef_test_vpermilvar_pd_512(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> undef, <8 x i32> <i32 undef, i32 0, i32 3, i32 undef, i32 undef, i32 4, i32 7, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x double> [[V:%.*]], <8 x double> poison, <8 x i32> <i32 undef, i32 0, i32 3, i32 undef, i32 undef, i32 4, i32 7, i32 undef>
 ; CHECK-NEXT:    ret <8 x double> [[TMP1]]
 ;
   %a = tail call <8 x double> @llvm.x86.avx512.vpermilvar.pd.512(<8 x double> %v, <8 x i64> <i64 undef, i64 1, i64 2, i64 undef, i64 undef, i64 1, i64 2, i64 undef>)
   ret <8 x double> %a
 }
 
 ; Simplify demanded elts
 
 define <4 x float> @elts_test_vpermilvar_ps(<4 x float> %a0, i32 %a1) {
 ; CHECK-LABEL: @elts_test_vpermilvar_ps(
 ; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x float> [[A0:%.*]], <4 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
 ; CHECK-NEXT:    ret <4 x float> [[TMP1]]
 ;
   %1 = insertelement <4 x i32> <i32 0, i32 1, i32 2, i32 3>, i32 %a1, i32 3
   %2 = tail call <4 x float> @llvm.x86.avx.vpermilvar.ps(<4 x float> %a0, <4 x i32> %1)
   %3 = shufflevector <4 x float> %2, <4 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
   ret <4 x float> %3
 }
 
 define <8 x float> @elts_test_vpermilvar_ps_256(<8 x float> %a0, <8 x i32> %a1) {
 ; CHECK-LABEL: @elts_test_vpermilvar_ps_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> undef, <8 x i32> <i32 undef, i32 0, i32 undef, i32 1, i32 undef, i32 6, i32 undef, i32 7>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <8 x float> [[A0:%.*]], <8 x float> poison, <8 x i32> <i32 undef, i32 0, i32 undef, i32 1, i32 undef, i32 6, i32 undef, i32 7>
 ; CHECK-NEXT:    ret <8 x float> [[TMP1]]
 ;
   %1 = shufflevector <8 x i32> %a1, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 3, i32 2, i32 1, i32 0>, <8 x i32> <i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11>
   %2 = tail call <8 x float> @llvm.x86.avx.vpermilvar.ps.256(<8 x float> %a0, <8 x i32> %1)
   %3 = shufflevector <8 x float> %2, <8 x float> undef, <8 x i32> <i32 undef, i32 1, i32 undef, i32 3, i32 undef, i32 5, i32 undef, i32 7>
   ret <8 x float> %3
 }
 
;
   %1 = insertelement <2 x i64> <i64 0, i64 2>, i64 %a1, i32 1
   %2 = tail call <2 x double> @llvm.x86.avx.vpermilvar.pd(<2 x double> %a0, <2 x i64> %1)
   %3 = shufflevector <2 x double> %2, <2 x double> undef, <2 x i32> <i32 0, i32 undef>
   ret <2 x double> %3
 }
 
 define <4 x double> @elts_test_vpermilvar_pd_256(<4 x double> %a0, <4 x i64> %a1) {
 ; CHECK-LABEL: @elts_test_vpermilvar_pd_256(
-; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> undef, <4 x i32> <i32 1, i32 0, i32 3, i32 undef>
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <4 x double> [[A0:%.*]], <4 x double> poison, <4 x i32> <i32 1, i32 0, i32 3, i32 undef>
 ; CHECK-NEXT:    ret <4 x double> [[TMP1]]
 ;
   %1 = shufflevector <4 x i64> <i64 0, i64 2, i64 0, i64 2>, <4 x i64> %a1, <4 x i32> <i32 1, i32 2, i32 3, i32 4>
   %2 = tail call <4 x double> @llvm.x86.avx.vpermilvar.pd.256(<4 x double> %a0, <4 x i64> %1)
   %3 = shufflevector <4 x double> %2, <4 x double> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 undef>
   ret <4 x double> %3
 }