diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1528,6 +1528,7 @@
     setOperationAction(ISD::TRUNCATE,    MVT::v8i32,  Legal);
     setOperationAction(ISD::TRUNCATE,    MVT::v16i16, Legal);
     setOperationAction(ISD::TRUNCATE,    MVT::v32i8,  HasBWI ? Legal : Custom);
+    setOperationAction(ISD::TRUNCATE,    MVT::v16i64, Custom);
     setOperationAction(ISD::ZERO_EXTEND, MVT::v32i16, Custom);
     setOperationAction(ISD::ZERO_EXTEND, MVT::v16i32, Custom);
     setOperationAction(ISD::ZERO_EXTEND, MVT::v8i64,  Custom);
@@ -20414,7 +20415,8 @@
   if (!TLI.isTypeLegal(InVT)) {
     if ((InVT == MVT::v8i64 || InVT == MVT::v16i32 || InVT == MVT::v16i64) &&
         VT.is128BitVector()) {
-      assert(Subtarget.hasVLX() && "Unexpected subtarget!");
+      assert((InVT == MVT::v16i64 || Subtarget.hasVLX()) &&
+             "Unexpected subtarget!");
       // The default behavior is to truncate one step, concatenate, and then
       // truncate the remainder. We'd rather produce two 64-bit results and
       // concatenate those.
@@ -36957,6 +36959,18 @@
   unsigned BitWidth = OriginalDemandedBits.getBitWidth();
   unsigned Opc = Op.getOpcode();
   switch(Opc) {
+  case X86ISD::VTRUNC: {
+    KnownBits KnownOp;
+    SDValue Src = Op.getOperand(0);
+    MVT SrcVT = Src.getSimpleValueType();
+
+    // Simplify the input, using demanded bit information.
+    APInt TruncMask = OriginalDemandedBits.zext(SrcVT.getScalarSizeInBits());
+    APInt DemandedElts = OriginalDemandedElts.trunc(SrcVT.getVectorNumElements());
+    if (SimplifyDemandedBits(Src, TruncMask, DemandedElts, KnownOp, TLO, Depth + 1))
+      return true;
+    break;
+  }
   case X86ISD::PMULDQ:
   case X86ISD::PMULUDQ: {
     // PMULDQ/PMULUDQ only uses lower 32 bits from each vector element.
@@ -43747,7 +43761,8 @@
   return combineVectorTruncation(N, DAG, Subtarget);
 }
 
-static SDValue combineVTRUNC(SDNode *N, SelectionDAG &DAG) {
+static SDValue combineVTRUNC(SDNode *N, SelectionDAG &DAG,
+                             TargetLowering::DAGCombinerInfo &DCI) {
   EVT VT = N->getValueType(0);
   SDValue In = N->getOperand(0);
   SDLoc DL(N);
@@ -43757,6 +43772,11 @@
   if (auto USatVal = detectUSatPattern(In, VT, DAG, DL))
     return DAG.getNode(X86ISD::VTRUNCUS, DL, VT, USatVal);
 
+  const TargetLowering &TLI = DAG.getTargetLoweringInfo();
+  APInt DemandedMask(APInt::getAllOnesValue(VT.getScalarSizeInBits()));
+  if (TLI.SimplifyDemandedBits(SDValue(N, 0), DemandedMask, DCI))
+    return SDValue(N, 0);
+
   return SDValue();
 }
 
@@ -47495,7 +47515,7 @@
   case ISD::FSUB:           return combineFaddFsub(N, DAG, Subtarget);
   case ISD::FNEG:           return combineFneg(N, DAG, DCI, Subtarget);
   case ISD::TRUNCATE:       return combineTruncate(N, DAG, Subtarget);
-  case X86ISD::VTRUNC:      return combineVTRUNC(N, DAG);
+  case X86ISD::VTRUNC:      return combineVTRUNC(N, DAG, DCI);
   case X86ISD::ANDNP:       return combineAndnp(N, DAG, DCI, Subtarget);
   case X86ISD::FAND:        return combineFAnd(N, DAG, Subtarget);
   case X86ISD::FANDN:       return combineFAndn(N, DAG, Subtarget);
diff --git a/llvm/test/CodeGen/X86/vector-trunc-math.ll b/llvm/test/CodeGen/X86/vector-trunc-math.ll
--- a/llvm/test/CodeGen/X86/vector-trunc-math.ll
+++ b/llvm/test/CodeGen/X86/vector-trunc-math.ll
@@ -300,12 +300,11 @@
 ;
 ; AVX512-LABEL: trunc_add_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpaddq %zmm3, %zmm1, %zmm1
 ; AVX512-NEXT:    vpaddq %zmm2, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpaddq %zmm3, %zmm1, %zmm1
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
   %1 = add <16 x i64> %a0, %a1
@@ -731,10 +730,9 @@
 ;
 ; AVX512-LABEL: trunc_add_const_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vpaddb {{.*}}(%rip), %xmm0, %xmm0
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
@@ -1146,12 +1144,11 @@
 ;
 ; AVX512-LABEL: trunc_sub_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpsubq %zmm3, %zmm1, %zmm1
 ; AVX512-NEXT:    vpsubq %zmm2, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpsubq %zmm3, %zmm1, %zmm1
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
   %1 = sub <16 x i64> %a0, %a1
@@ -1545,10 +1542,9 @@
 ;
 ; AVX512-LABEL: trunc_sub_const_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vpsubb {{.*}}(%rip), %xmm0, %xmm0
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
@@ -2079,38 +2075,31 @@
 ;
 ; AVX512F-LABEL: trunc_mul_v16i64_v16i8:
 ; AVX512F:       # %bb.0:
-; AVX512F-NEXT:    vpmovqd %zmm3, %ymm3
-; AVX512F-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512F-NEXT:    vpmulld %ymm3, %ymm1, %ymm1
-; AVX512F-NEXT:    vpmovqd %zmm2, %ymm2
-; AVX512F-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512F-NEXT:    vpmulld %ymm2, %ymm0, %ymm0
-; AVX512F-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512F-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512F-NEXT:    vpmuludq %zmm2, %zmm0, %zmm0
+; AVX512F-NEXT:    vpmuludq %zmm3, %zmm1, %zmm1
+; AVX512F-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512F-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512F-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512F-NEXT:    vzeroupper
 ; AVX512F-NEXT:    retq
 ;
 ; AVX512BW-LABEL: trunc_mul_v16i64_v16i8:
 ; AVX512BW:       # %bb.0:
-; AVX512BW-NEXT:    vpmovqd %zmm3, %ymm3
-; AVX512BW-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512BW-NEXT:    vpmulld %ymm3, %ymm1, %ymm1
-; AVX512BW-NEXT:    vpmovqd %zmm2, %ymm2
-; AVX512BW-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512BW-NEXT:    vpmulld %ymm2, %ymm0, %ymm0
-; AVX512BW-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512BW-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512BW-NEXT:    vpmuludq %zmm2, %zmm0, %zmm0
+; AVX512BW-NEXT:    vpmuludq %zmm3, %zmm1, %zmm1
+; AVX512BW-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512BW-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512BW-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512BW-NEXT:    vzeroupper
 ; AVX512BW-NEXT:    retq
 ;
 ; AVX512DQ-LABEL: trunc_mul_v16i64_v16i8:
 ; AVX512DQ:       # %bb.0:
-; AVX512DQ-NEXT:    vpmullq %zmm3, %zmm1, %zmm1
 ; AVX512DQ-NEXT:    vpmullq %zmm2, %zmm0, %zmm0
-; AVX512DQ-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512DQ-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512DQ-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512DQ-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512DQ-NEXT:    vpmullq %zmm3, %zmm1, %zmm1
+; AVX512DQ-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512DQ-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512DQ-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512DQ-NEXT:    vzeroupper
 ; AVX512DQ-NEXT:    retq
   %1 = mul <16 x i64> %a0, %a1
@@ -2587,16 +2576,35 @@
 ; AVX2-FAST-NEXT:    vzeroupper
 ; AVX2-FAST-NEXT:    retq
 ;
-; AVX512-LABEL: trunc_mul_const_v16i64_v16i8:
-; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmulld {{.*}}(%rip), %ymm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vpmulld {{.*}}(%rip), %ymm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
-; AVX512-NEXT:    vzeroupper
-; AVX512-NEXT:    retq
+; AVX512F-LABEL: trunc_mul_const_v16i64_v16i8:
+; AVX512F:       # %bb.0:
+; AVX512F-NEXT:    vpmuludq {{.*}}(%rip), %zmm0, %zmm0
+; AVX512F-NEXT:    vpmuludq {{.*}}(%rip), %zmm1, %zmm1
+; AVX512F-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512F-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512F-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX512F-NEXT:    vzeroupper
+; AVX512F-NEXT:    retq
+;
+; AVX512BW-LABEL: trunc_mul_const_v16i64_v16i8:
+; AVX512BW:       # %bb.0:
+; AVX512BW-NEXT:    vpmuludq {{.*}}(%rip), %zmm0, %zmm0
+; AVX512BW-NEXT:    vpmuludq {{.*}}(%rip), %zmm1, %zmm1
+; AVX512BW-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512BW-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512BW-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX512BW-NEXT:    vzeroupper
+; AVX512BW-NEXT:    retq
+;
+; AVX512DQ-LABEL: trunc_mul_const_v16i64_v16i8:
+; AVX512DQ:       # %bb.0:
+; AVX512DQ-NEXT:    vpmullq {{.*}}(%rip), %zmm0, %zmm0
+; AVX512DQ-NEXT:    vpmullq {{.*}}(%rip), %zmm1, %zmm1
+; AVX512DQ-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512DQ-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512DQ-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX512DQ-NEXT:    vzeroupper
+; AVX512DQ-NEXT:    retq
   %1 = mul <16 x i64> %a0, <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9, i64 10, i64 11, i64 12, i64 13, i64 14, i64 15>
   %2 = trunc <16 x i64> %1 to <16 x i8>
   ret <16 x i8> %2
@@ -3024,12 +3032,11 @@
 ;
 ; AVX512-LABEL: trunc_and_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpandq %zmm3, %zmm1, %zmm1
 ; AVX512-NEXT:    vpandq %zmm2, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpandq %zmm3, %zmm1, %zmm1
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
   %1 = and <16 x i64> %a0, %a1
@@ -3396,10 +3403,9 @@
 ;
 ; AVX512-LABEL: trunc_and_const_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vpand {{.*}}(%rip), %xmm0, %xmm0
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
@@ -3789,12 +3795,11 @@
 ;
 ; AVX512-LABEL: trunc_xor_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpxorq %zmm3, %zmm1, %zmm1
 ; AVX512-NEXT:    vpxorq %zmm2, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpxorq %zmm3, %zmm1, %zmm1
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
   %1 = xor <16 x i64> %a0, %a1
@@ -4161,10 +4166,9 @@
 ;
 ; AVX512-LABEL: trunc_xor_const_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vpxor {{.*}}(%rip), %xmm0, %xmm0
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
@@ -4554,12 +4558,11 @@
 ;
 ; AVX512-LABEL: trunc_or_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vporq %zmm3, %zmm1, %zmm1
 ; AVX512-NEXT:    vporq %zmm2, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vporq %zmm3, %zmm1, %zmm1
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
   %1 = or <16 x i64> %a0, %a1
@@ -4926,10 +4929,9 @@
 ;
 ; AVX512-LABEL: trunc_or_const_v16i64_v16i8:
 ; AVX512:       # %bb.0:
-; AVX512-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512-NEXT:    vpmovdb %zmm0, %xmm0
+; AVX512-NEXT:    vpmovqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
 ; AVX512-NEXT:    vpor {{.*}}(%rip), %xmm0, %xmm0
 ; AVX512-NEXT:    vzeroupper
 ; AVX512-NEXT:    retq
diff --git a/llvm/test/CodeGen/X86/vector-trunc-packus.ll b/llvm/test/CodeGen/X86/vector-trunc-packus.ll
--- a/llvm/test/CodeGen/X86/vector-trunc-packus.ll
+++ b/llvm/test/CodeGen/X86/vector-trunc-packus.ll
@@ -5033,57 +5033,16 @@
 ; AVX2-NEXT:    vzeroupper
 ; AVX2-NEXT:    retq
 ;
-; AVX512F-LABEL: trunc_packus_v16i64_v16i8:
-; AVX512F:       # %bb.0:
-; AVX512F-NEXT:    vpbroadcastq {{.*#+}} zmm0 = [255,255,255,255,255,255,255,255]
-; AVX512F-NEXT:    vpminsq (%rdi), %zmm0, %zmm1
-; AVX512F-NEXT:    vpminsq 64(%rdi), %zmm0, %zmm0
-; AVX512F-NEXT:    vpxor %xmm2, %xmm2, %xmm2
-; AVX512F-NEXT:    vpmaxsq %zmm2, %zmm0, %zmm0
-; AVX512F-NEXT:    vpmaxsq %zmm2, %zmm1, %zmm1
-; AVX512F-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512F-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512F-NEXT:    vinserti64x4 $1, %ymm0, %zmm1, %zmm0
-; AVX512F-NEXT:    vpmovdb %zmm0, %xmm0
-; AVX512F-NEXT:    vzeroupper
-; AVX512F-NEXT:    retq
-;
-; AVX512VL-LABEL: trunc_packus_v16i64_v16i8:
-; AVX512VL:       # %bb.0:
-; AVX512VL-NEXT:    vpxor %xmm0, %xmm0, %xmm0
-; AVX512VL-NEXT:    vpmaxsq 64(%rdi), %zmm0, %zmm1
-; AVX512VL-NEXT:    vpmovusqb %zmm1, %xmm1
-; AVX512VL-NEXT:    vpmaxsq (%rdi), %zmm0, %zmm0
-; AVX512VL-NEXT:    vpmovusqb %zmm0, %xmm0
-; AVX512VL-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
-; AVX512VL-NEXT:    vzeroupper
-; AVX512VL-NEXT:    retq
-;
-; AVX512BW-LABEL: trunc_packus_v16i64_v16i8:
-; AVX512BW:       # %bb.0:
-; AVX512BW-NEXT:    vpbroadcastq {{.*#+}} zmm0 = [255,255,255,255,255,255,255,255]
-; AVX512BW-NEXT:    vpminsq (%rdi), %zmm0, %zmm1
-; AVX512BW-NEXT:    vpminsq 64(%rdi), %zmm0, %zmm0
-; AVX512BW-NEXT:    vpxor %xmm2, %xmm2, %xmm2
-; AVX512BW-NEXT:    vpmaxsq %zmm2, %zmm0, %zmm0
-; AVX512BW-NEXT:    vpmaxsq %zmm2, %zmm1, %zmm1
-; AVX512BW-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512BW-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512BW-NEXT:    vinserti64x4 $1, %ymm0, %zmm1, %zmm0
-; AVX512BW-NEXT:    vpmovdb %zmm0, %xmm0
-; AVX512BW-NEXT:    vzeroupper
-; AVX512BW-NEXT:    retq
-;
-; AVX512BWVL-LABEL: trunc_packus_v16i64_v16i8:
-; AVX512BWVL:       # %bb.0:
-; AVX512BWVL-NEXT:    vpxor %xmm0, %xmm0, %xmm0
-; AVX512BWVL-NEXT:    vpmaxsq 64(%rdi), %zmm0, %zmm1
-; AVX512BWVL-NEXT:    vpmovusqb %zmm1, %xmm1
-; AVX512BWVL-NEXT:    vpmaxsq (%rdi), %zmm0, %zmm0
-; AVX512BWVL-NEXT:    vpmovusqb %zmm0, %xmm0
-; AVX512BWVL-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
-; AVX512BWVL-NEXT:    vzeroupper
-; AVX512BWVL-NEXT:    retq
+; AVX512-LABEL: trunc_packus_v16i64_v16i8:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vpxor %xmm0, %xmm0, %xmm0
+; AVX512-NEXT:    vpmaxsq 64(%rdi), %zmm0, %zmm1
+; AVX512-NEXT:    vpmovusqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmaxsq (%rdi), %zmm0, %zmm0
+; AVX512-NEXT:    vpmovusqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
 ;
 ; SKX-LABEL: trunc_packus_v16i64_v16i8:
 ; SKX:       # %bb.0:
diff --git a/llvm/test/CodeGen/X86/vector-trunc-ssat.ll b/llvm/test/CodeGen/X86/vector-trunc-ssat.ll
--- a/llvm/test/CodeGen/X86/vector-trunc-ssat.ll
+++ b/llvm/test/CodeGen/X86/vector-trunc-ssat.ll
@@ -4835,55 +4835,15 @@
 ; AVX2-NEXT:    vzeroupper
 ; AVX2-NEXT:    retq
 ;
-; AVX512F-LABEL: trunc_ssat_v16i64_v16i8:
-; AVX512F:       # %bb.0:
-; AVX512F-NEXT:    vpbroadcastq {{.*#+}} zmm0 = [127,127,127,127,127,127,127,127]
-; AVX512F-NEXT:    vpminsq (%rdi), %zmm0, %zmm1
-; AVX512F-NEXT:    vpminsq 64(%rdi), %zmm0, %zmm0
-; AVX512F-NEXT:    vpbroadcastq {{.*#+}} zmm2 = [18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488]
-; AVX512F-NEXT:    vpmaxsq %zmm2, %zmm0, %zmm0
-; AVX512F-NEXT:    vpmaxsq %zmm2, %zmm1, %zmm1
-; AVX512F-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512F-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512F-NEXT:    vinserti64x4 $1, %ymm0, %zmm1, %zmm0
-; AVX512F-NEXT:    vpmovdb %zmm0, %xmm0
-; AVX512F-NEXT:    vzeroupper
-; AVX512F-NEXT:    retq
-;
-; AVX512VL-LABEL: trunc_ssat_v16i64_v16i8:
-; AVX512VL:       # %bb.0:
-; AVX512VL-NEXT:    vmovdqa64 (%rdi), %zmm0
-; AVX512VL-NEXT:    vmovdqa64 64(%rdi), %zmm1
-; AVX512VL-NEXT:    vpmovsqb %zmm1, %xmm1
-; AVX512VL-NEXT:    vpmovsqb %zmm0, %xmm0
-; AVX512VL-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
-; AVX512VL-NEXT:    vzeroupper
-; AVX512VL-NEXT:    retq
-;
-; AVX512BW-LABEL: trunc_ssat_v16i64_v16i8:
-; AVX512BW:       # %bb.0:
-; AVX512BW-NEXT:    vpbroadcastq {{.*#+}} zmm0 = [127,127,127,127,127,127,127,127]
-; AVX512BW-NEXT:    vpminsq (%rdi), %zmm0, %zmm1
-; AVX512BW-NEXT:    vpminsq 64(%rdi), %zmm0, %zmm0
-; AVX512BW-NEXT:    vpbroadcastq {{.*#+}} zmm2 = [18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488,18446744073709551488]
-; AVX512BW-NEXT:    vpmaxsq %zmm2, %zmm0, %zmm0
-; AVX512BW-NEXT:    vpmaxsq %zmm2, %zmm1, %zmm1
-; AVX512BW-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512BW-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512BW-NEXT:    vinserti64x4 $1, %ymm0, %zmm1, %zmm0
-; AVX512BW-NEXT:    vpmovdb %zmm0, %xmm0
-; AVX512BW-NEXT:    vzeroupper
-; AVX512BW-NEXT:    retq
-;
-; AVX512BWVL-LABEL: trunc_ssat_v16i64_v16i8:
-; AVX512BWVL:       # %bb.0:
-; AVX512BWVL-NEXT:    vmovdqa64 (%rdi), %zmm0
-; AVX512BWVL-NEXT:    vmovdqa64 64(%rdi), %zmm1
-; AVX512BWVL-NEXT:    vpmovsqb %zmm1, %xmm1
-; AVX512BWVL-NEXT:    vpmovsqb %zmm0, %xmm0
-; AVX512BWVL-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
-; AVX512BWVL-NEXT:    vzeroupper
-; AVX512BWVL-NEXT:    retq
+; AVX512-LABEL: trunc_ssat_v16i64_v16i8:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vmovdqa64 (%rdi), %zmm0
+; AVX512-NEXT:    vmovdqa64 64(%rdi), %zmm1
+; AVX512-NEXT:    vpmovsqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovsqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
 ;
 ; SKX-LABEL: trunc_ssat_v16i64_v16i8:
 ; SKX:       # %bb.0:
diff --git a/llvm/test/CodeGen/X86/vector-trunc-usat.ll b/llvm/test/CodeGen/X86/vector-trunc-usat.ll
--- a/llvm/test/CodeGen/X86/vector-trunc-usat.ll
+++ b/llvm/test/CodeGen/X86/vector-trunc-usat.ll
@@ -3543,49 +3543,15 @@
 ; AVX2-NEXT:    vzeroupper
 ; AVX2-NEXT:    retq
 ;
-; AVX512F-LABEL: trunc_usat_v16i64_v16i8:
-; AVX512F:       # %bb.0:
-; AVX512F-NEXT:    vpbroadcastq {{.*#+}} zmm0 = [255,255,255,255,255,255,255,255]
-; AVX512F-NEXT:    vpminuq 64(%rdi), %zmm0, %zmm1
-; AVX512F-NEXT:    vpminuq (%rdi), %zmm0, %zmm0
-; AVX512F-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512F-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512F-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512F-NEXT:    vpmovdb %zmm0, %xmm0
-; AVX512F-NEXT:    vzeroupper
-; AVX512F-NEXT:    retq
-;
-; AVX512VL-LABEL: trunc_usat_v16i64_v16i8:
-; AVX512VL:       # %bb.0:
-; AVX512VL-NEXT:    vmovdqa64 (%rdi), %zmm0
-; AVX512VL-NEXT:    vmovdqa64 64(%rdi), %zmm1
-; AVX512VL-NEXT:    vpmovusqb %zmm1, %xmm1
-; AVX512VL-NEXT:    vpmovusqb %zmm0, %xmm0
-; AVX512VL-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
-; AVX512VL-NEXT:    vzeroupper
-; AVX512VL-NEXT:    retq
-;
-; AVX512BW-LABEL: trunc_usat_v16i64_v16i8:
-; AVX512BW:       # %bb.0:
-; AVX512BW-NEXT:    vpbroadcastq {{.*#+}} zmm0 = [255,255,255,255,255,255,255,255]
-; AVX512BW-NEXT:    vpminuq 64(%rdi), %zmm0, %zmm1
-; AVX512BW-NEXT:    vpminuq (%rdi), %zmm0, %zmm0
-; AVX512BW-NEXT:    vpmovqd %zmm0, %ymm0
-; AVX512BW-NEXT:    vpmovqd %zmm1, %ymm1
-; AVX512BW-NEXT:    vinserti64x4 $1, %ymm1, %zmm0, %zmm0
-; AVX512BW-NEXT:    vpmovdb %zmm0, %xmm0
-; AVX512BW-NEXT:    vzeroupper
-; AVX512BW-NEXT:    retq
-;
-; AVX512BWVL-LABEL: trunc_usat_v16i64_v16i8:
-; AVX512BWVL:       # %bb.0:
-; AVX512BWVL-NEXT:    vmovdqa64 (%rdi), %zmm0
-; AVX512BWVL-NEXT:    vmovdqa64 64(%rdi), %zmm1
-; AVX512BWVL-NEXT:    vpmovusqb %zmm1, %xmm1
-; AVX512BWVL-NEXT:    vpmovusqb %zmm0, %xmm0
-; AVX512BWVL-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
-; AVX512BWVL-NEXT:    vzeroupper
-; AVX512BWVL-NEXT:    retq
+; AVX512-LABEL: trunc_usat_v16i64_v16i8:
+; AVX512:       # %bb.0:
+; AVX512-NEXT:    vmovdqa64 (%rdi), %zmm0
+; AVX512-NEXT:    vmovdqa64 64(%rdi), %zmm1
+; AVX512-NEXT:    vpmovusqb %zmm1, %xmm1
+; AVX512-NEXT:    vpmovusqb %zmm0, %xmm0
+; AVX512-NEXT:    vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; AVX512-NEXT:    vzeroupper
+; AVX512-NEXT:    retq
 ;
 ; SKX-LABEL: trunc_usat_v16i64_v16i8:
 ; SKX:       # %bb.0: