diff --git a/llvm/include/llvm/IR/PatternMatch.h b/llvm/include/llvm/IR/PatternMatch.h
--- a/llvm/include/llvm/IR/PatternMatch.h
+++ b/llvm/include/llvm/IR/PatternMatch.h
@@ -564,6 +564,19 @@
   return V;
 }
 
+struct is_negated_power2_or_zero {
+  bool isValue(const APInt &C) { return !C || C.isNegatedPowerOf2(); }
+};
+/// Match a integer or vector negated power-of-2.
+/// For vectors, this includes constants with undefined elements.
+inline cst_pred_ty<is_negated_power2_or_zero> m_NegatedPower2OrZero() {
+  return cst_pred_ty<is_negated_power2_or_zero>();
+}
+inline api_pred_ty<is_negated_power2_or_zero>
+m_NegatedPower2OrZero(const APInt *&V) {
+  return V;
+}
+
 struct is_power2_or_zero {
   bool isValue(const APInt &C) { return !C || C.isPowerOf2(); }
 };
@@ -595,6 +608,18 @@
 }
 inline api_pred_ty<is_lowbit_mask> m_LowBitMask(const APInt *&V) { return V; }
 
+struct is_lowbit_mask_or_zero {
+  bool isValue(const APInt &C) { return !C || C.isMask(); }
+};
+/// Match an integer or vector with only the low bit(s) set.
+/// For vectors, this includes constants with undefined elements.
+inline cst_pred_ty<is_lowbit_mask_or_zero> m_LowBitMaskOrZero() {
+  return cst_pred_ty<is_lowbit_mask_or_zero>();
+}
+inline api_pred_ty<is_lowbit_mask_or_zero> m_LowBitMaskOrZero(const APInt *&V) {
+  return V;
+}
+
 struct icmp_pred_with_threshold {
   ICmpInst::Predicate Pred;
   const APInt *Thr;
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -3978,6 +3978,109 @@
   return nullptr;
 }
 
+// Returns of V is a Mask ((X + 1) & X == 0) or ~Mask (-Pow2OrZero)
+static bool isMaskOrZero(const Value *V, bool Not, const SimplifyQuery &Q,
+                         unsigned Depth = 0) {
+  if (Not ? match(V, m_NegatedPower2OrZero()) : match(V, m_LowBitMaskOrZero()))
+    return true;
+  if (V->getType()->getScalarSizeInBits() == 1)
+    return true;
+  if (Depth++ >= MaxAnalysisRecursionDepth)
+    return false;
+  Value *X;
+  if (match(V, m_Not(m_Value(X))))
+    return isMaskOrZero(X, !Not, Q, Depth);
+  const Operator *I = dyn_cast<Operator>(V);
+  if (I == nullptr)
+    return false;
+  switch (I->getOpcode()) {
+  case Instruction::ZExt:
+    // ZExt(Mask) is a Mask.
+    return !Not && isMaskOrZero(I->getOperand(0), Not, Q, Depth);
+  case Instruction::SExt:
+    // SExt(Mask) is a Mask.
+    // SExt(~Mask) is a ~Mask.
+    return isMaskOrZero(I->getOperand(0), Not, Q, Depth);
+  case Instruction::And:
+  case Instruction::Or:
+    // Mask0 | Mask1 is a Mask.
+    // Mask0 & Mask1 is a Mask.
+    // ~Mask0 | ~Mask1 is a ~Mask.
+    // ~Mask0 & ~Mask1 is a ~Mask.
+    return isMaskOrZero(I->getOperand(1), Not, Q, Depth) &&
+           isMaskOrZero(I->getOperand(0), Not, Q, Depth);
+  case Instruction::Xor:
+    // (X ^ (X - 1)) is a Mask
+    return match(V, m_c_Xor(m_Value(X), m_Add(m_Deferred(X), m_AllOnes())));
+  case Instruction::Select:
+    // c ? Mask0 : Mask1 is a Mask.
+    return isMaskOrZero(I->getOperand(1), Not, Q, Depth) &&
+           isMaskOrZero(I->getOperand(2), Not, Q, Depth);
+  case Instruction::Shl:
+    if (Not) {
+      // (-1 >> X) << X is ~Mask
+      if (match(I->getOperand(0),
+                m_Shr(m_AllOnes(), m_Specific(I->getOperand(1)))))
+        return true;
+
+      // (~Mask) << X is a ~Mask.
+      return isMaskOrZero(I->getOperand(0), Not, Q, Depth);
+    }
+    break;
+  case Instruction::LShr:
+    if (!Not) {
+      // (-1 << X) >> X is a Mask
+      if (match(I->getOperand(0),
+                m_Shl(m_AllOnes(), m_Specific(I->getOperand(1)))))
+        return true;
+      // Mask >> X is a Mask.
+      return isMaskOrZero(I->getOperand(0), Not, Q, Depth);
+    }
+    return false;
+  case Instruction::AShr:
+    // Mask s>> X is a Mask.
+    // ~Mask s>> X is a ~Mask.
+    return isMaskOrZero(I->getOperand(0), Not, Q, Depth);
+  case Instruction::Add:
+    // Pow2 - 1 is a Mask.
+    if (!Not && match(I->getOperand(1), m_AllOnes()))
+      return isKnownToBeAPowerOfTwo(I->getOperand(0), Q.DL, /*OrZero*/ true,
+                                    Depth, Q.AC, Q.CxtI, Q.DT);
+    break;
+  case Instruction::Sub:
+    // -Pow2 is a ~Mask.
+    if (Not && match(I->getOperand(0), m_Zero()))
+      return isKnownToBeAPowerOfTwo(I->getOperand(1), Q.DL, /*OrZero*/ true,
+                                    Depth, Q.AC, Q.CxtI, Q.DT);
+    break;
+  case Instruction::Invoke:
+  case Instruction::Call: {
+    if (auto *II = dyn_cast<IntrinsicInst>(I)) {
+      switch (II->getIntrinsicID()) {
+        // min/max(Mask0, Mask1) is a Mask.
+        // min/max(~Mask0, ~Mask1) is a ~Mask.
+      case Intrinsic::umax:
+      case Intrinsic::smax:
+      case Intrinsic::umin:
+      case Intrinsic::smin:
+        return isMaskOrZero(II->getArgOperand(1), Not, Q, Depth) &&
+               isMaskOrZero(II->getArgOperand(0), Not, Q, Depth);
+
+        // In the context of masks, bitreverse(Mask) == ~Mask
+      case Intrinsic::bitreverse:
+        return isMaskOrZero(II->getArgOperand(0), !Not, Q, Depth);
+      default:
+        break;
+      }
+    }
+    break;
+  }
+  default:
+    break;
+  }
+  return false;
+}
+
 /// Some comparisons can be simplified.
 /// In this case, we are looking for comparisons that look like
 /// a check for a lossy truncation.
@@ -3991,21 +4094,35 @@
 /// The Mask can be a constant, too.
 /// For some predicates, the operands are commutative.
 /// For others, x can only be on a specific side.
-static Value *foldICmpWithLowBitMaskedVal(ICmpInst &I,
-                                          InstCombiner::BuilderTy &Builder) {
+static Value *foldICmpWithLowBitMaskedVal(ICmpInst &I, const SimplifyQuery &Q,
+                                          InstCombiner &IC) {
+
+  Value *X, *M;
+  ICmpInst::Predicate Pred = I.getPredicate();
   ICmpInst::Predicate SrcPred;
-  Value *X, *M, *Y;
-  auto m_VariableMask = m_CombineOr(
-      m_CombineOr(m_Not(m_Shl(m_AllOnes(), m_Value())),
-                  m_Add(m_Shl(m_One(), m_Value()), m_AllOnes())),
-      m_CombineOr(m_LShr(m_AllOnes(), m_Value()),
-                  m_LShr(m_Shl(m_AllOnes(), m_Value(Y)), m_Deferred(Y))));
-  auto m_Mask = m_CombineOr(m_VariableMask, m_LowBitMask());
-  if (!match(&I, m_c_ICmp(SrcPred,
-                          m_c_And(m_CombineAnd(m_Mask, m_Value(M)), m_Value(X)),
-                          m_Deferred(X))))
-    return nullptr;
+  bool NeedsNot = false;
+
+  auto CheckMask = [&](Value *V, bool Not) {
+    if (!ICmpInst::isSigned(Pred))
+      return isMaskOrZero(V, Not, Q);
+    return Not ? match(V, m_NegatedPower2OrZero())
+               : match(V, m_LowBitMaskOrZero());
+  };
 
+  auto TryMatch = [&](unsigned OpNo) {
+    SrcPred = Pred;
+    if (match(I.getOperand(OpNo),
+              m_c_And(m_Specific(I.getOperand(1 - OpNo)), m_Value(M)))) {
+      X = I.getOperand(1 - OpNo);
+      if (OpNo)
+        SrcPred = ICmpInst::getSwappedPredicate(Pred);
+      return CheckMask(M, /*Not*/ false);
+    }
+    return false;
+  };
+
+  if (!TryMatch(0) && !TryMatch(1))
+    return nullptr;
   ICmpInst::Predicate DstPred;
   switch (SrcPred) {
   case ICmpInst::Predicate::ICMP_EQ:
@@ -4073,7 +4190,9 @@
     M = Constant::replaceUndefsWith(VecC, SafeReplacementConstant);
   }
 
-  return Builder.CreateICmp(DstPred, X, M);
+  if (NeedsNot)
+    M = IC.Builder.CreateNot(M);
+  return IC.Builder.CreateICmp(DstPred, X, M);
 }
 
 /// Some comparisons can be simplified.
@@ -4980,7 +5099,7 @@
   if (Value *V = foldMultiplicationOverflowCheck(I))
     return replaceInstUsesWith(I, V);
 
-  if (Value *V = foldICmpWithLowBitMaskedVal(I, Builder))
+  if (Value *V = foldICmpWithLowBitMaskedVal(I, Q, *this))
     return replaceInstUsesWith(I, V);
 
   if (Instruction *R = foldICmpAndXX(I, Q, *this))
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-eq-to-icmp-ule.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-eq-to-icmp-ule.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-eq-to-icmp-ule.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-eq-to-icmp-ule.ll
@@ -62,8 +62,7 @@
 
 define <2 x i1> @p2_vec_nonsplat_edgecase0(<2 x i8> %x) {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
-; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], <i8 -4, i8 -1>
-; CHECK-NEXT:    [[RET:%.*]] = icmp eq <2 x i8> [[TMP1]], zeroinitializer
+; CHECK-NEXT:    [[RET:%.*]] = icmp ult <2 x i8> [[X:%.*]], <i8 4, i8 1>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ne-to-icmp-ugt.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ne-to-icmp-ugt.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ne-to-icmp-ugt.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ne-to-icmp-ugt.ll
@@ -62,8 +62,7 @@
 
 define <2 x i1> @p2_vec_nonsplat_edgecase0(<2 x i8> %x) {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
-; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], <i8 -4, i8 -1>
-; CHECK-NEXT:    [[RET:%.*]] = icmp ne <2 x i8> [[TMP1]], zeroinitializer
+; CHECK-NEXT:    [[RET:%.*]] = icmp ugt <2 x i8> [[X:%.*]], <i8 3, i8 0>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sge-to-icmp-sle.ll
@@ -50,8 +50,7 @@
 
 define <2 x i1> @p2_vec_nonsplat_edgecase(<2 x i8> %x) {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase(
-; CHECK-NEXT:    [[TMP0:%.*]] = and <2 x i8> [[X:%.*]], <i8 3, i8 0>
-; CHECK-NEXT:    [[RET:%.*]] = icmp sge <2 x i8> [[TMP0]], [[X]]
+; CHECK-NEXT:    [[RET:%.*]] = icmp slt <2 x i8> [[X:%.*]], <i8 4, i8 1>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sgt-to-icmp-sgt.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sgt-to-icmp-sgt.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sgt-to-icmp-sgt.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sgt-to-icmp-sgt.ll
@@ -63,8 +63,7 @@
 define <2 x i1> @p2_vec_nonsplat_edgecase() {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase(
 ; CHECK-NEXT:    [[X:%.*]] = call <2 x i8> @gen2x8()
-; CHECK-NEXT:    [[TMP0:%.*]] = and <2 x i8> [[X]], <i8 3, i8 0>
-; CHECK-NEXT:    [[RET:%.*]] = icmp sgt <2 x i8> [[X]], [[TMP0]]
+; CHECK-NEXT:    [[RET:%.*]] = icmp sgt <2 x i8> [[X]], <i8 3, i8 0>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %x = call <2 x i8> @gen2x8()
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sle-to-icmp-sle.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sle-to-icmp-sle.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sle-to-icmp-sle.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sle-to-icmp-sle.ll
@@ -63,8 +63,7 @@
 define <2 x i1> @p2_vec_nonsplat_edgecase() {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase(
 ; CHECK-NEXT:    [[X:%.*]] = call <2 x i8> @gen2x8()
-; CHECK-NEXT:    [[TMP0:%.*]] = and <2 x i8> [[X]], <i8 3, i8 0>
-; CHECK-NEXT:    [[RET:%.*]] = icmp sle <2 x i8> [[X]], [[TMP0]]
+; CHECK-NEXT:    [[RET:%.*]] = icmp slt <2 x i8> [[X]], <i8 4, i8 1>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %x = call <2 x i8> @gen2x8()
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll
@@ -50,8 +50,7 @@
 
 define <2 x i1> @p2_vec_nonsplat_edgecase(<2 x i8> %x) {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase(
-; CHECK-NEXT:    [[TMP0:%.*]] = and <2 x i8> [[X:%.*]], <i8 3, i8 0>
-; CHECK-NEXT:    [[RET:%.*]] = icmp slt <2 x i8> [[TMP0]], [[X]]
+; CHECK-NEXT:    [[RET:%.*]] = icmp sgt <2 x i8> [[X:%.*]], <i8 3, i8 0>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-uge-to-icmp-ule.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-uge-to-icmp-ule.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-uge-to-icmp-ule.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-uge-to-icmp-ule.ll
@@ -62,8 +62,7 @@
 
 define <2 x i1> @p2_vec_nonsplat_edgecase0(<2 x i8> %x) {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
-; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], <i8 -4, i8 -1>
-; CHECK-NEXT:    [[RET:%.*]] = icmp eq <2 x i8> [[TMP1]], zeroinitializer
+; CHECK-NEXT:    [[RET:%.*]] = icmp ult <2 x i8> [[X:%.*]], <i8 4, i8 1>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ugt-to-icmp-ugt.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ugt-to-icmp-ugt.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ugt-to-icmp-ugt.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ugt-to-icmp-ugt.ll
@@ -75,8 +75,7 @@
 define <2 x i1> @p2_vec_nonsplat_edgecase0() {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
 ; CHECK-NEXT:    [[X:%.*]] = call <2 x i8> @gen2x8()
-; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X]], <i8 -4, i8 -1>
-; CHECK-NEXT:    [[RET:%.*]] = icmp ne <2 x i8> [[TMP1]], zeroinitializer
+; CHECK-NEXT:    [[RET:%.*]] = icmp ugt <2 x i8> [[X]], <i8 3, i8 0>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %x = call <2 x i8> @gen2x8()
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ule-to-icmp-ule.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ule-to-icmp-ule.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ule-to-icmp-ule.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ule-to-icmp-ule.ll
@@ -75,8 +75,7 @@
 define <2 x i1> @p2_vec_nonsplat_edgecase0() {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
 ; CHECK-NEXT:    [[X:%.*]] = call <2 x i8> @gen2x8()
-; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X]], <i8 -4, i8 -1>
-; CHECK-NEXT:    [[RET:%.*]] = icmp eq <2 x i8> [[TMP1]], zeroinitializer
+; CHECK-NEXT:    [[RET:%.*]] = icmp ult <2 x i8> [[X]], <i8 4, i8 1>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %x = call <2 x i8> @gen2x8()
diff --git a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ult-to-icmp-ugt.ll b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ult-to-icmp-ugt.ll
--- a/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ult-to-icmp-ugt.ll
+++ b/llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ult-to-icmp-ugt.ll
@@ -62,8 +62,7 @@
 
 define <2 x i1> @p2_vec_nonsplat_edgecase0(<2 x i8> %x) {
 ; CHECK-LABEL: @p2_vec_nonsplat_edgecase0(
-; CHECK-NEXT:    [[TMP1:%.*]] = and <2 x i8> [[X:%.*]], <i8 -4, i8 -1>
-; CHECK-NEXT:    [[RET:%.*]] = icmp ne <2 x i8> [[TMP1]], zeroinitializer
+; CHECK-NEXT:    [[RET:%.*]] = icmp ugt <2 x i8> [[X:%.*]], <i8 3, i8 0>
 ; CHECK-NEXT:    ret <2 x i1> [[RET]]
 ;
   %tmp0 = and <2 x i8> %x, <i8 3, i8 0>
diff --git a/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll b/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll
--- a/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll
+++ b/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll
@@ -15,8 +15,7 @@
 ; CHECK-NEXT:    [[X:%.*]] = xor i16 [[X_IN:%.*]], 123
 ; CHECK-NEXT:    [[M_IN:%.*]] = lshr i8 -1, [[Y:%.*]]
 ; CHECK-NEXT:    [[MASK:%.*]] = zext i8 [[M_IN]] to i16
-; CHECK-NEXT:    [[AND:%.*]] = and i16 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i16 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i16 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i16 %x_in, 123
@@ -94,8 +93,7 @@
 ; CHECK-NEXT:    [[MY:%.*]] = lshr i8 7, [[Y:%.*]]
 ; CHECK-NEXT:    [[MZ:%.*]] = lshr i8 -1, [[Z:%.*]]
 ; CHECK-NEXT:    [[MASK:%.*]] = and i8 [[MY]], [[MZ]]
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 [[X]], [[AND]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -133,8 +131,7 @@
 ; CHECK-NEXT:    [[X:%.*]] = xor i8 [[X_IN:%.*]], 123
 ; CHECK-NEXT:    [[MY:%.*]] = lshr i8 -1, [[Y:%.*]]
 ; CHECK-NEXT:    [[MASK:%.*]] = and i8 [[MY]], 7
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[MASK]], [[X]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 [[X]], [[AND]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -151,8 +148,7 @@
 ; CHECK-NEXT:    [[X:%.*]] = xor i8 [[X_IN:%.*]], 123
 ; CHECK-NEXT:    [[Y_M1:%.*]] = add i8 [[Y:%.*]], -1
 ; CHECK-NEXT:    [[MASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -187,8 +183,7 @@
 ; CHECK-NEXT:    [[Y_M1:%.*]] = add i8 [[Y:%.*]], -1
 ; CHECK-NEXT:    [[YMASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
 ; CHECK-NEXT:    [[MASK:%.*]] = select i1 [[COND:%.*]], i8 [[YMASK]], i8 15
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[MASK]], [[X]]
-; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -267,8 +262,7 @@
 ; CHECK-NEXT:    [[YMASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
 ; CHECK-NEXT:    [[SMASK:%.*]] = select i1 [[COND:%.*]], i8 [[YMASK]], i8 15
 ; CHECK-NEXT:    [[MASK:%.*]] = lshr i8 [[SMASK]], [[Z:%.*]]
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[MASK]], [[X]]
-; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[X]], [[AND]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -288,8 +282,7 @@
 ; CHECK-NEXT:    [[YMASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
 ; CHECK-NEXT:    [[SMASK:%.*]] = select i1 [[COND:%.*]], i8 [[YMASK]], i8 15
 ; CHECK-NEXT:    [[MASK:%.*]] = ashr i8 [[SMASK]], [[Z:%.*]]
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -307,8 +300,7 @@
 ; CHECK-NEXT:    [[X:%.*]] = xor i8 [[X_IN:%.*]], 123
 ; CHECK-NEXT:    [[P2ORZ:%.*]] = shl i8 2, [[Y:%.*]]
 ; CHECK-NEXT:    [[MASK:%.*]] = add i8 [[P2ORZ]], -1
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[MASK]], [[X]]
-; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -325,8 +317,7 @@
 ; CHECK-NEXT:    [[Y_M1:%.*]] = add i8 [[Y:%.*]], -1
 ; CHECK-NEXT:    [[YMASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
 ; CHECK-NEXT:    [[MASK:%.*]] = call i8 @llvm.umax.i8(i8 [[YMASK]], i8 3)
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -346,8 +337,7 @@
 ; CHECK-NEXT:    [[YMASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
 ; CHECK-NEXT:    [[ZMASK:%.*]] = lshr i8 15, [[Z:%.*]]
 ; CHECK-NEXT:    [[MASK:%.*]] = call i8 @llvm.umin.i8(i8 [[YMASK]], i8 [[ZMASK]])
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[MASK]], [[X]]
-; CHECK-NEXT:    [[R:%.*]] = icmp ne i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ugt i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -387,8 +377,7 @@
 ; CHECK-NEXT:    [[Y_M1:%.*]] = add i8 [[Y:%.*]], -1
 ; CHECK-NEXT:    [[YMASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
 ; CHECK-NEXT:    [[MASK:%.*]] = call i8 @llvm.smax.i8(i8 [[YMASK]], i8 -1)
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -407,8 +396,7 @@
 ; CHECK-NEXT:    [[Y_M1:%.*]] = add i8 [[Y:%.*]], -1
 ; CHECK-NEXT:    [[YMASK:%.*]] = xor i8 [[Y_M1]], [[Y]]
 ; CHECK-NEXT:    [[MASK:%.*]] = call i8 @llvm.smin.i8(i8 [[YMASK]], i8 0)
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[MASK]], [[X]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -426,8 +414,7 @@
 ; CHECK-NEXT:    [[X:%.*]] = xor i8 [[X_IN:%.*]], 123
 ; CHECK-NEXT:    [[NMASK:%.*]] = shl i8 -1, [[Y:%.*]]
 ; CHECK-NEXT:    [[MASK:%.*]] = call i8 @llvm.bitreverse.i8(i8 [[NMASK]])
-; CHECK-NEXT:    [[AND:%.*]] = and i8 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i8 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i8 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i8 %x_in, 123
@@ -445,8 +432,7 @@
 ; CHECK-NEXT:    [[M_IN:%.*]] = shl i8 -8, [[Y:%.*]]
 ; CHECK-NEXT:    [[TMP1:%.*]] = xor i8 [[M_IN]], -1
 ; CHECK-NEXT:    [[MASK:%.*]] = sext i8 [[TMP1]] to i16
-; CHECK-NEXT:    [[AND:%.*]] = and i16 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i16 [[AND]], [[X]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i16 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i16 %x_in, 123
@@ -544,8 +530,7 @@
 ; CHECK-NEXT:    [[NMASK:%.*]] = sext i8 [[M_IN]] to i16
 ; CHECK-NEXT:    [[NMASK_SHR:%.*]] = ashr i16 [[NMASK]], [[Z:%.*]]
 ; CHECK-NEXT:    [[MASK:%.*]] = xor i16 [[NMASK_SHR]], -1
-; CHECK-NEXT:    [[AND:%.*]] = and i16 [[X]], [[MASK]]
-; CHECK-NEXT:    [[R:%.*]] = icmp eq i16 [[X]], [[AND]]
+; CHECK-NEXT:    [[R:%.*]] = icmp ule i16 [[X]], [[MASK]]
 ; CHECK-NEXT:    ret i1 [[R]]
 ;
   %x = xor i16 %x_in, 123