1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 9120555d7db..75485977d6a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -680,7 +680,7 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op,
     // If all of the unknown bits are known to be zero on one side or the other
     // (but not both) turn this into an *inclusive* or.
     //    e.g. (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
-    if ((NewMask & ~Known.Zero & ~Known2.Zero) == 0)
+    if (NewMask.isSubsetOf(Known.Zero|Known2.Zero))
       return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::OR, dl, VT,
                                                Op.getOperand(0),
                                                Op.getOperand(1)));