Index: lib/Target/X86/X86ISelDAGToDAG.cpp
===================================================================
--- lib/Target/X86/X86ISelDAGToDAG.cpp
+++ lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -442,10 +442,45 @@
     bool foldLoadStoreIntoMemOperand(SDNode *Node);
 
     bool matchBEXTRFromAnd(SDNode *Node);
+
+    bool isMaskZeroExtended(SDNode *N) const;
   };
 }
 
 
+// Returns true if this masked compare can be implemented legally with this
+// type.
+static bool isLegalMaskCompare(SDNode *N, const X86Subtarget *Subtarget) {
+  if (N->getOpcode() == X86ISD::PCMPEQM ||
+      N->getOpcode() == X86ISD::PCMPGTM ||
+      N->getOpcode() == X86ISD::CMPM ||
+      N->getOpcode() == X86ISD::CMPMU) {
+    // We can get 256-bit 8 element types here without VLX being enabled. When
+    // this happens we will use 512-bit operations and the mask will not be
+    // zero extended.
+    if (N->getOperand(0).getValueType() == MVT::v8i32 ||
+        N->getOperand(0).getValueType() == MVT::v8f32)
+      return Subtarget->hasVLX();
+
+    return true;
+  }
+
+  return false;
+}
+
+// Returns true if we can assume the writer of the mask has zero extended it
+// for us.
+bool X86DAGToDAGISel::isMaskZeroExtended(SDNode *N) const {
+  // If this is an AND, check if we have a compare on either side. As long as
+  // one side guarantees the mask is zero extended, the AND will preserve those
+  // zeros.
+  if (N->getOpcode() == ISD::AND)
+    return isLegalMaskCompare(N->getOperand(0).getNode(), Subtarget) ||
+           isLegalMaskCompare(N->getOperand(1).getNode(), Subtarget);
+
+  return isLegalMaskCompare(N, Subtarget);
+}
+
 bool
 X86DAGToDAGISel::IsProfitableToFold(SDValue N, SDNode *U, SDNode *Root) const {
   if (OptLevel == CodeGenOpt::None) return false;
Index: lib/Target/X86/X86InstrAVX512.td
===================================================================
--- lib/Target/X86/X86InstrAVX512.td
+++ lib/Target/X86/X86InstrAVX512.td
@@ -1866,217 +1866,6 @@
                 T8PD, VEX_W, EVEX_CD8<64, CD8VF>;
 
 
-multiclass avx512_icmp_packed_lowering<X86VectorVTInfo _, X86KVectorVTInfo NewInf,
-                                       SDNode OpNode, string InstrStr,
-                                       list<Predicate> Preds> {
-let Predicates = Preds in {
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (OpNode (_.VT _.RC:$src1), (_.VT _.RC:$src2))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rr) _.RC:$src1, _.RC:$src2),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (OpNode (_.VT _.RC:$src1),
-                                             (_.VT (bitconvert (_.LdFrag addr:$src2))))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rm) _.RC:$src1, addr:$src2),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and _.KRCWM:$mask,
-                                          (OpNode (_.VT _.RC:$src1), (_.VT _.RC:$src2)))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rrk) _.KRCWM:$mask,
-                                                                _.RC:$src1, _.RC:$src2),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and (_.KVT _.KRCWM:$mask),
-                                          (_.KVT (OpNode (_.VT _.RC:$src1),
-                                                         (_.VT (bitconvert
-                                                                (_.LdFrag addr:$src2))))))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmk) _.KRCWM:$mask,
-                                                                 _.RC:$src1, addr:$src2),
-                              NewInf.KRC)>;
-}
-}
-
-multiclass avx512_icmp_packed_rmb_lowering<X86VectorVTInfo _, X86KVectorVTInfo NewInf,
-                                           SDNode OpNode, string InstrStr,
-                                           list<Predicate> Preds>
-         : avx512_icmp_packed_lowering<_, NewInf, OpNode, InstrStr, Preds> {
-let Predicates = Preds in {
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (OpNode (_.VT _.RC:$src1),
-                                            (X86VBroadcast (_.ScalarLdFrag addr:$src2)))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmb) _.RC:$src1, addr:$src2),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and (_.KVT _.KRCWM:$mask),
-                                          (_.KVT (OpNode (_.VT _.RC:$src1),
-                                                         (X86VBroadcast
-                                                          (_.ScalarLdFrag addr:$src2)))))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmbk) _.KRCWM:$mask,
-                                                                  _.RC:$src1, addr:$src2),
-                              NewInf.KRC)>;
-}
-}
-
-// VPCMPEQB - i8
-defm : avx512_icmp_packed_lowering<v16i8x_info, v32i1_info, X86pcmpeqm,
-                                   "VPCMPEQBZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v16i8x_info, v64i1_info, X86pcmpeqm,
-                                   "VPCMPEQBZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_packed_lowering<v32i8x_info, v64i1_info, X86pcmpeqm,
-                                   "VPCMPEQBZ256", [HasBWI, HasVLX]>;
-
-// VPCMPEQW - i16
-defm : avx512_icmp_packed_lowering<v8i16x_info, v16i1_info, X86pcmpeqm,
-                                   "VPCMPEQWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v8i16x_info, v32i1_info, X86pcmpeqm,
-                                   "VPCMPEQWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v8i16x_info, v64i1_info, X86pcmpeqm,
-                                   "VPCMPEQWZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_packed_lowering<v16i16x_info, v32i1_info, X86pcmpeqm,
-                                   "VPCMPEQWZ256", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v16i16x_info, v64i1_info, X86pcmpeqm,
-                                   "VPCMPEQWZ256", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_packed_lowering<v32i16_info, v64i1_info, X86pcmpeqm,
-                                   "VPCMPEQWZ", [HasBWI]>;
-
-// VPCMPEQD - i32
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info, v8i1_info,  X86pcmpeqm,
-                                       "VPCMPEQDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info, v16i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info, v32i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info, v64i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v8i32x_info, v16i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i32x_info, v32i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i32x_info, v64i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v16i32_info, v32i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ", [HasAVX512]>;
-defm : avx512_icmp_packed_rmb_lowering<v16i32_info, v64i1_info, X86pcmpeqm,
-                                       "VPCMPEQDZ", [HasAVX512]>;
-
-// VPCMPEQQ - i64
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v4i1_info,  X86pcmpeqm,
-                                       "VPCMPEQQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v8i1_info,  X86pcmpeqm,
-                                       "VPCMPEQQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v16i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v32i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v64i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v8i1_info,  X86pcmpeqm,
-                                       "VPCMPEQQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v16i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v32i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v64i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v8i64_info, v16i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ", [HasAVX512]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i64_info, v32i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ", [HasAVX512]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i64_info, v64i1_info, X86pcmpeqm,
-                                       "VPCMPEQQZ", [HasAVX512]>;
-
-// VPCMPGTB - i8
-defm : avx512_icmp_packed_lowering<v16i8x_info, v32i1_info, X86pcmpgtm,
-                                   "VPCMPGTBZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v16i8x_info, v64i1_info, X86pcmpgtm,
-                                   "VPCMPGTBZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_packed_lowering<v32i8x_info, v64i1_info, X86pcmpgtm,
-                                   "VPCMPGTBZ256", [HasBWI, HasVLX]>;
-
-// VPCMPGTW - i16
-defm : avx512_icmp_packed_lowering<v8i16x_info,  v16i1_info, X86pcmpgtm,
-                                   "VPCMPGTWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v8i16x_info,  v32i1_info, X86pcmpgtm,
-                                   "VPCMPGTWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v8i16x_info,  v64i1_info, X86pcmpgtm,
-                                   "VPCMPGTWZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_packed_lowering<v16i16x_info, v32i1_info, X86pcmpgtm,
-                                   "VPCMPGTWZ256", [HasBWI, HasVLX]>;
-defm : avx512_icmp_packed_lowering<v16i16x_info, v64i1_info, X86pcmpgtm,
-                                   "VPCMPGTWZ256", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_packed_lowering<v32i16_info,  v64i1_info, X86pcmpgtm,
-                                   "VPCMPGTWZ", [HasBWI]>;
-
-// VPCMPGTD - i32
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info,  v8i1_info,  X86pcmpgtm,
-                                       "VPCMPGTDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info,  v16i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info,  v32i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i32x_info,  v64i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v8i32x_info,  v16i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i32x_info,  v32i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i32x_info,  v64i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v16i32_info, v32i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ", [HasAVX512]>;
-defm : avx512_icmp_packed_rmb_lowering<v16i32_info, v64i1_info, X86pcmpgtm,
-                                       "VPCMPGTDZ", [HasAVX512]>;
-
-// VPCMPGTQ - i64
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v4i1_info,  X86pcmpgtm,
-                                       "VPCMPGTQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v8i1_info,  X86pcmpgtm,
-                                       "VPCMPGTQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v16i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v32i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v2i64x_info, v64i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v8i1_info,  X86pcmpgtm,
-                                       "VPCMPGTQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v16i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v32i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_packed_rmb_lowering<v4i64x_info, v64i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_packed_rmb_lowering<v8i64_info, v16i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ", [HasAVX512]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i64_info, v32i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ", [HasAVX512]>;
-defm : avx512_icmp_packed_rmb_lowering<v8i64_info, v64i1_info, X86pcmpgtm,
-                                       "VPCMPGTQZ", [HasAVX512]>;
-
 multiclass avx512_icmp_cc<bits<8> opc, string Suffix, SDNode OpNode,
                           X86VectorVTInfo _> {
   let isCommutable = 1 in
@@ -2238,236 +2027,6 @@
 defm VPCMPUQ : avx512_icmp_cc_rmb_vl<0x1E, "uq", X86cmpmu, avx512vl_i64_info,
                                      HasAVX512>, VEX_W, EVEX_CD8<64, CD8VF>;
 
-multiclass avx512_icmp_cc_packed_lowering<X86VectorVTInfo _, X86KVectorVTInfo NewInf,
-                                          SDNode OpNode, string InstrStr,
-                                          list<Predicate> Preds> {
-let Predicates = Preds in {
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (OpNode (_.VT _.RC:$src1),
-                                             (_.VT _.RC:$src2),
-                                             imm:$cc)),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rri) _.RC:$src1,
-                                                                 _.RC:$src2,
-                                                                 imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (OpNode (_.VT _.RC:$src1),
-                                             (_.VT (bitconvert (_.LdFrag addr:$src2))),
-                                             imm:$cc)),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmi) _.RC:$src1,
-                                                                 addr:$src2,
-                                                                 imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and _.KRCWM:$mask,
-                                          (OpNode (_.VT _.RC:$src1),
-                                                  (_.VT _.RC:$src2),
-                                                  imm:$cc))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rrik) _.KRCWM:$mask,
-                                                                  _.RC:$src1,
-                                                                  _.RC:$src2,
-                                                                  imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and (_.KVT _.KRCWM:$mask),
-                                          (_.KVT (OpNode (_.VT _.RC:$src1),
-                                                         (_.VT (bitconvert
-                                                                (_.LdFrag addr:$src2))),
-                                                         imm:$cc)))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmik) _.KRCWM:$mask,
-                                                                  _.RC:$src1,
-                                                                  addr:$src2,
-                                                                  imm:$cc),
-                              NewInf.KRC)>;
-}
-}
-
-multiclass avx512_icmp_cc_packed_rmb_lowering<X86VectorVTInfo _, X86KVectorVTInfo NewInf,
-                                              SDNode OpNode, string InstrStr,
-                                              list<Predicate> Preds>
-         : avx512_icmp_cc_packed_lowering<_, NewInf, OpNode, InstrStr, Preds> {
-let Predicates = Preds in {
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (OpNode (_.VT _.RC:$src1),
-                                             (X86VBroadcast (_.ScalarLdFrag addr:$src2)),
-                                             imm:$cc)),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmib) _.RC:$src1,
-                                                                  addr:$src2,
-                                                                  imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and (_.KVT _.KRCWM:$mask),
-                                          (_.KVT (OpNode (_.VT _.RC:$src1),
-                                                         (X86VBroadcast
-                                                            (_.ScalarLdFrag addr:$src2)),
-                                                         imm:$cc)))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmibk) _.KRCWM:$mask,
-                                                                   _.RC:$src1,
-                                                                   addr:$src2,
-                                                                   imm:$cc),
-                              NewInf.KRC)>;
-}
-}
-
-// VPCMPB - i8
-defm : avx512_icmp_cc_packed_lowering<v16i8x_info, v32i1_info, X86cmpm,
-                                      "VPCMPBZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v16i8x_info, v64i1_info, X86cmpm,
-                                      "VPCMPBZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_lowering<v32i8x_info, v64i1_info, X86cmpm,
-                                      "VPCMPBZ256", [HasBWI, HasVLX]>;
-
-// VPCMPW - i16
-defm : avx512_icmp_cc_packed_lowering<v8i16x_info,  v16i1_info, X86cmpm,
-                                      "VPCMPWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v8i16x_info,  v32i1_info, X86cmpm,
-                                      "VPCMPWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v8i16x_info,  v64i1_info, X86cmpm,
-                                      "VPCMPWZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_lowering<v16i16x_info, v32i1_info, X86cmpm,
-                                      "VPCMPWZ256", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v16i16x_info, v64i1_info, X86cmpm,
-                                      "VPCMPWZ256", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_lowering<v32i16_info, v64i1_info, X86cmpm,
-                                      "VPCMPWZ", [HasBWI]>;
-
-// VPCMPD - i32
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v8i1_info,   X86cmpm,
-                                          "VPCMPDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v16i1_info,  X86cmpm,
-                                          "VPCMPDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v32i1_info,  X86cmpm,
-                                          "VPCMPDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v64i1_info,  X86cmpm,
-                                          "VPCMPDZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i32x_info,  v16i1_info, X86cmpm,
-                                          "VPCMPDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i32x_info,  v32i1_info, X86cmpm,
-                                          "VPCMPDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i32x_info,  v64i1_info, X86cmpm,
-                                          "VPCMPDZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v16i32_info, v32i1_info, X86cmpm,
-                                          "VPCMPDZ", [HasAVX512]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v16i32_info, v64i1_info, X86cmpm,
-                                          "VPCMPDZ", [HasAVX512]>;
-
-// VPCMPQ - i64
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v4i1_info,   X86cmpm,
-                                          "VPCMPQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v8i1_info,   X86cmpm,
-                                          "VPCMPQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v16i1_info,  X86cmpm,
-                                          "VPCMPQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v32i1_info,  X86cmpm,
-                                          "VPCMPQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v64i1_info,  X86cmpm,
-                                          "VPCMPQZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v8i1_info,   X86cmpm,
-                                          "VPCMPQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v16i1_info,  X86cmpm,
-                                          "VPCMPQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v32i1_info,  X86cmpm,
-                                          "VPCMPQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v64i1_info,  X86cmpm,
-                                          "VPCMPQZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i64_info, v16i1_info, X86cmpm,
-                                          "VPCMPQZ", [HasAVX512]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i64_info, v32i1_info, X86cmpm,
-                                          "VPCMPQZ", [HasAVX512]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i64_info, v64i1_info, X86cmpm,
-                                          "VPCMPQZ", [HasAVX512]>;
-
-// VPCMPUB - i8
-defm : avx512_icmp_cc_packed_lowering<v16i8x_info, v32i1_info, X86cmpmu,
-                                      "VPCMPUBZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v16i8x_info, v64i1_info, X86cmpmu,
-                                      "VPCMPUBZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_lowering<v32i8x_info, v64i1_info, X86cmpmu,
-                                      "VPCMPUBZ256", [HasBWI, HasVLX]>;
-
-// VPCMPUW - i16
-defm : avx512_icmp_cc_packed_lowering<v8i16x_info,  v16i1_info, X86cmpmu,
-                                      "VPCMPUWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v8i16x_info,  v32i1_info, X86cmpmu,
-                                      "VPCMPUWZ128", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v8i16x_info,  v64i1_info, X86cmpmu,
-                                      "VPCMPUWZ128", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_lowering<v16i16x_info, v32i1_info, X86cmpmu,
-                                      "VPCMPUWZ256", [HasBWI, HasVLX]>;
-defm : avx512_icmp_cc_packed_lowering<v16i16x_info, v64i1_info, X86cmpmu,
-                                      "VPCMPUWZ256", [HasBWI, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_lowering<v32i16_info, v64i1_info, X86cmpmu,
-                                      "VPCMPUWZ", [HasBWI]>;
-
-// VPCMPUD - i32
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v8i1_info,   X86cmpmu,
-                                          "VPCMPUDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v16i1_info,  X86cmpmu,
-                                          "VPCMPUDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v32i1_info,  X86cmpmu,
-                                          "VPCMPUDZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i32x_info,  v64i1_info,  X86cmpmu,
-                                          "VPCMPUDZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i32x_info,  v16i1_info, X86cmpmu,
-                                          "VPCMPUDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i32x_info,  v32i1_info, X86cmpmu,
-                                          "VPCMPUDZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i32x_info,  v64i1_info, X86cmpmu,
-                                          "VPCMPUDZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v16i32_info, v32i1_info, X86cmpmu,
-                                          "VPCMPUDZ", [HasAVX512]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v16i32_info, v64i1_info, X86cmpmu,
-                                          "VPCMPUDZ", [HasAVX512]>;
-
-// VPCMPUQ - i64
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v4i1_info,   X86cmpmu,
-                                          "VPCMPUQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v8i1_info,   X86cmpmu,
-                                          "VPCMPUQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v16i1_info,  X86cmpmu,
-                                          "VPCMPUQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v32i1_info,  X86cmpmu,
-                                          "VPCMPUQZ128", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v2i64x_info, v64i1_info,  X86cmpmu,
-                                          "VPCMPUQZ128", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v8i1_info,   X86cmpmu,
-                                          "VPCMPUQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v16i1_info,  X86cmpmu,
-                                          "VPCMPUQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v32i1_info,  X86cmpmu,
-                                          "VPCMPUQZ256", [HasAVX512, HasVLX]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v4i64x_info, v64i1_info,  X86cmpmu,
-                                          "VPCMPUQZ256", [HasAVX512, HasVLX]>;
-
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i64_info, v16i1_info, X86cmpmu,
-                                          "VPCMPUQZ", [HasAVX512]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i64_info, v32i1_info, X86cmpmu,
-                                          "VPCMPUQZ", [HasAVX512]>;
-defm : avx512_icmp_cc_packed_rmb_lowering<v8i64_info, v64i1_info, X86cmpmu,
-                                          "VPCMPUQZ", [HasAVX512]>;
 
 multiclass avx512_vcmp_common<X86VectorVTInfo _> {
 
@@ -2559,159 +2118,6 @@
 defm VCMPPS : avx512_vcmp<avx512vl_f32_info>,
                           AVX512PSIi8Base, EVEX_4V, EVEX_CD8<32, CD8VF>;
 
-multiclass avx512_fcmp_cc_packed_lowering<X86VectorVTInfo _, X86KVectorVTInfo NewInf,
-                                          string InstrStr, list<Predicate> Preds> {
-let Predicates = Preds in {
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (X86cmpm (_.VT _.RC:$src1),
-                                              (_.VT _.RC:$src2),
-                                              imm:$cc)),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rri) _.RC:$src1,
-                                                                 _.RC:$src2,
-                                                                 imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and _.KRCWM:$mask, 
-                                          (X86cmpm (_.VT _.RC:$src1), 
-                                                   (_.VT _.RC:$src2), 
-                                                    imm:$cc))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rrik) _.KRCWM:$mask,
-                                                                  _.RC:$src1, 
-                                                                  _.RC:$src2,
-                                                                  imm:$cc),
-                              NewInf.KRC)>;
-  
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (X86cmpm (_.VT _.RC:$src1), 
-                                              (_.VT (bitconvert (_.LdFrag addr:$src2))),
-                                              imm:$cc)),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmi) _.RC:$src1,
-                                                                 addr:$src2,
-                                                                 imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and _.KRCWM:$mask, 
-                                         (X86cmpm (_.VT _.RC:$src1), 
-                                                  (_.VT (bitconvert 
-                                                         (_.LdFrag addr:$src2))),
-                                                  imm:$cc))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmik) _.KRCWM:$mask,
-                                                                  _.RC:$src1,
-                                                                  addr:$src2,
-                                                                  imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (X86cmpm (_.VT _.RC:$src1),
-                                              (X86VBroadcast (_.ScalarLdFrag addr:$src2)),
-                                              imm:$cc)),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmbi) _.RC:$src1,
-                                                                  addr:$src2,
-                                                                  imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and _.KRCWM:$mask, 
-                                          (X86cmpm (_.VT _.RC:$src1),
-                                                   (X86VBroadcast 
-                                                    (_.ScalarLdFrag addr:$src2)),
-                                                   imm:$cc))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rmbik) _.KRCWM:$mask,
-                                                                   _.RC:$src1,
-                                                                   addr:$src2,
-                                                                   imm:$cc),
-                              NewInf.KRC)>;
-}
-}
-
-multiclass avx512_fcmp_cc_packed_sae_lowering<X86VectorVTInfo _, X86KVectorVTInfo NewInf,
-                                              string InstrStr, list<Predicate> Preds>
-         : avx512_fcmp_cc_packed_lowering<_, NewInf, InstrStr, Preds> {
-
-let Predicates = Preds in
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (X86cmpmRnd (_.VT _.RC:$src1),
-                                                 (_.VT _.RC:$src2),
-                                                 imm:$cc,
-                                                 (i32 FROUND_NO_EXC))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rrib) _.RC:$src1,
-                                                                 _.RC:$src2,
-                                                                 imm:$cc),
-                              NewInf.KRC)>;
-
-  def : Pat<(insert_subvector (NewInf.KVT immAllZerosV),
-                              (_.KVT (and _.KRCWM:$mask, 
-                                          (X86cmpmRnd (_.VT _.RC:$src1), 
-                                                      (_.VT _.RC:$src2), 
-                                                      imm:$cc,
-                                                      (i32 FROUND_NO_EXC)))),
-                              (i64 0)),
-            (COPY_TO_REGCLASS (!cast<Instruction>(InstrStr##rribk) _.KRCWM:$mask, 
-                                                                   _.RC:$src1, 
-                                                                   _.RC:$src2,
-                                                                   imm:$cc),
-                              NewInf.KRC)>;
-}
-
-
-// VCMPPS - f32
-defm : avx512_fcmp_cc_packed_lowering<v4f32x_info,  v8i1_info,  "VCMPPSZ128",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v4f32x_info,  v16i1_info, "VCMPPSZ128",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v4f32x_info,  v32i1_info, "VCMPPSZ128",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v4f32x_info,  v64i1_info, "VCMPPSZ128",
-                                      [HasAVX512, HasVLX]>;
-
-defm : avx512_fcmp_cc_packed_lowering<v8f32x_info,  v16i1_info, "VCMPPSZ256",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v8f32x_info,  v32i1_info, "VCMPPSZ256",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v8f32x_info,  v64i1_info, "VCMPPSZ256",
-                                      [HasAVX512, HasVLX]>;
-
-defm : avx512_fcmp_cc_packed_sae_lowering<v16f32_info, v32i1_info, "VCMPPSZ",
-                                          [HasAVX512]>;
-defm : avx512_fcmp_cc_packed_sae_lowering<v16f32_info, v64i1_info, "VCMPPSZ",
-                                          [HasAVX512]>;
-
-// VCMPPD - f64
-defm : avx512_fcmp_cc_packed_lowering<v2f64x_info, v4i1_info,  "VCMPPDZ128",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v2f64x_info, v8i1_info,  "VCMPPDZ128",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v2f64x_info, v16i1_info, "VCMPPDZ128",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v2f64x_info, v32i1_info, "VCMPPDZ128",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v2f64x_info, v64i1_info, "VCMPPDZ128",
-                                      [HasAVX512, HasVLX]>;
-
-defm : avx512_fcmp_cc_packed_lowering<v4f64x_info, v8i1_info,  "VCMPPDZ256",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v4f64x_info, v16i1_info, "VCMPPDZ256",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v4f64x_info, v32i1_info, "VCMPPDZ256",
-                                      [HasAVX512, HasVLX]>;
-defm : avx512_fcmp_cc_packed_lowering<v4f64x_info, v64i1_info, "VCMPPDZ256",
-                                      [HasAVX512, HasVLX]>;
-
-defm : avx512_fcmp_cc_packed_sae_lowering<v8f64_info, v16i1_info, "VCMPPDZ",
-                                          [HasAVX512]>;
-defm : avx512_fcmp_cc_packed_sae_lowering<v8f64_info, v32i1_info, "VCMPPDZ",
-                                          [HasAVX512]>;
-defm : avx512_fcmp_cc_packed_sae_lowering<v8f64_info, v64i1_info, "VCMPPDZ",
-                                          [HasAVX512]>;
 
 // ----------------------------------------------------------------
 // FPClass
@@ -3211,24 +2617,6 @@
             (v16i32 (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src1, sub_ymm)),
             (v16i32 (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src2, sub_ymm))),
            VK8)>;
-
-def : Pat<(insert_subvector (v16i1 immAllZerosV),
-                            (v8i1 (OpNode (v8i32 VR256X:$src1), (v8i32 VR256X:$src2))),
-                            (i64 0)),
-            (KSHIFTRWri (KSHIFTLWri (!cast<Instruction>(InstStr##Zrr)
-                     (v16i32 (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src1, sub_ymm)),
-                     (v16i32 (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src2, sub_ymm))),
-            (i8 8)), (i8 8))>;
-
-def : Pat<(insert_subvector (v16i1 immAllZerosV),
-                            (v8i1 (and VK8:$mask,
-                                       (OpNode (v8i32 VR256X:$src1), (v8i32 VR256X:$src2)))),
-                            (i64 0)),
-            (KSHIFTRWri (KSHIFTLWri (!cast<Instruction>(InstStr##Zrrk)
-                     (COPY_TO_REGCLASS VK8:$mask, VK16),
-                     (v16i32 (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src1, sub_ymm)),
-                     (v16i32 (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src2, sub_ymm))),
-            (i8 8)), (i8 8))>;
 }
 
 multiclass axv512_icmp_packed_cc_no_vlx_lowering<SDNode OpNode, string InstStr,
@@ -3246,26 +2634,6 @@
             (_.info512.VT (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src1, sub_ymm)),
             (_.info512.VT (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src2, sub_ymm)),
             imm:$cc), VK8)>;
-
-def : Pat<(insert_subvector (v16i1 immAllZerosV),
-                            (v8i1 (OpNode (_.info256.VT VR256X:$src1), (_.info256.VT VR256X:$src2), imm:$cc)),
-                            (i64 0)),
-            (KSHIFTRWri (KSHIFTLWri (!cast<Instruction>(InstStr##Zrri)
-                     (_.info512.VT (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src1, sub_ymm)),
-                     (_.info512.VT (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src2, sub_ymm)),
-                     imm:$cc),
-            (i8 8)), (i8 8))>;
-
-def : Pat<(insert_subvector (v16i1 immAllZerosV),
-                            (v8i1 (and VK8:$mask,
-                                       (OpNode (_.info256.VT VR256X:$src1), (_.info256.VT VR256X:$src2), imm:$cc))),
-                            (i64 0)),
-            (KSHIFTRWri (KSHIFTLWri (!cast<Instruction>(InstStr##Zrrik)
-                     (COPY_TO_REGCLASS VK8:$mask, VK16),
-                     (_.info512.VT (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src1, sub_ymm)),
-                     (_.info512.VT (INSERT_SUBREG (IMPLICIT_DEF), VR256X:$src2, sub_ymm)),
-                     imm:$cc),
-            (i8 8)), (i8 8))>;
 }
 
 let Predicates = [HasAVX512, NoVLX] in {
Index: lib/Target/X86/X86InstrVecCompiler.td
===================================================================
--- lib/Target/X86/X86InstrVecCompiler.td
+++ lib/Target/X86/X86InstrVecCompiler.td
@@ -419,3 +419,84 @@
 defm: subvector_zero_ellision<VR256, v16i32, v8i32,  v16i32, sub_ymm, zeroupperv8i32>;
 defm: subvector_zero_ellision<VR256, v32i16, v16i16, v16i32, sub_ymm, zeroupperv16i16>;
 defm: subvector_zero_ellision<VR256, v64i8,  v32i8,  v16i32, sub_ymm, zeroupperv32i8>;
+
+
+class maskzeroupper<ValueType vt, RegisterClass RC> :
+  PatLeaf<(vt RC:$src), [{
+    return isMaskZeroExtended(N);
+  }]>;
+
+def maskzeroupperv2i1  : maskzeroupper<v2i1,  VK2>;
+def maskzeroupperv4i1  : maskzeroupper<v4i1,  VK4>;
+def maskzeroupperv8i1  : maskzeroupper<v8i1,  VK8>;
+def maskzeroupperv16i1 : maskzeroupper<v16i1, VK16>;
+def maskzeroupperv32i1 : maskzeroupper<v32i1, VK32>;
+
+// The patterns determine if we can depend on the upper bits of a mask register
+// being zeroed by the previous operation so that we can skip explicit
+// zeroing.
+let Predicates = [HasBWI] in {
+  def : Pat<(v32i1 (insert_subvector (v32i1 immAllZerosV),
+                                     maskzeroupperv8i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK8:$src, VK32)>;
+  def : Pat<(v32i1 (insert_subvector (v32i1 immAllZerosV),
+                                     maskzeroupperv16i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK16:$src, VK32)>;
+  def : Pat<(v64i1 (insert_subvector (v64i1 immAllZerosV),
+                                     maskzeroupperv8i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK8:$src, VK64)>;
+  def : Pat<(v64i1 (insert_subvector (v64i1 immAllZerosV),
+                                     maskzeroupperv16i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK16:$src, VK64)>;
+  def : Pat<(v64i1 (insert_subvector (v64i1 immAllZerosV),
+                                     maskzeroupperv32i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK32:$src, VK64)>;
+}
+
+let Predicates = [HasAVX512] in {
+  def : Pat<(v16i1 (insert_subvector (v16i1 immAllZerosV),
+                                     maskzeroupperv8i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK8:$src, VK16)>;
+}
+
+let Predicates = [HasVLX] in {
+  def : Pat<(v4i1 (insert_subvector (v4i1 immAllZerosV),
+                                    maskzeroupperv2i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK2:$src, VK4)>;
+  def : Pat<(v8i1 (insert_subvector (v8i1 immAllZerosV),
+                                    maskzeroupperv2i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK2:$src, VK8)>;
+  def : Pat<(v8i1 (insert_subvector (v8i1 immAllZerosV),
+                                    maskzeroupperv4i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK4:$src, VK8)>;
+  def : Pat<(v16i1 (insert_subvector (v16i1 immAllZerosV),
+                                     maskzeroupperv2i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK2:$src, VK16)>;
+  def : Pat<(v16i1 (insert_subvector (v16i1 immAllZerosV),
+                                     maskzeroupperv4i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK4:$src, VK16)>;
+}
+
+let Predicates = [HasBWI, HasVLX] in {
+  def : Pat<(v32i1 (insert_subvector (v32i1 immAllZerosV),
+                                     maskzeroupperv2i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK2:$src, VK32)>;
+  def : Pat<(v32i1 (insert_subvector (v32i1 immAllZerosV),
+                                     maskzeroupperv4i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK4:$src, VK32)>;
+  def : Pat<(v64i1 (insert_subvector (v64i1 immAllZerosV),
+                                     maskzeroupperv2i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK2:$src, VK64)>;
+  def : Pat<(v64i1 (insert_subvector (v64i1 immAllZerosV),
+                                     maskzeroupperv4i1:$src, (iPTR 0))),
+            (COPY_TO_REGCLASS VK4:$src, VK64)>;
+}
+
+// If the bits are not zero we have to fall back to explicitly zeroing by
+// using shifts.
+let Predicates = [HasAVX512, NoVLX] in {
+  def : Pat<(v16i1 (insert_subvector (v16i1 immAllZerosV),
+                                     (v8i1 VK8:$mask), (iPTR 0))),
+            (KSHIFTRWri (KSHIFTLWri (COPY_TO_REGCLASS VK8:$mask, VK16),
+                                    (i8 8)), (i8 8))>;
+}