[TargetLowering] Use APInt::isSubsetOf to simplify some code. NFC

llvm-svn: 339508
2018-08-12 05:34:15 +00:00 · 2018-08-12 05:34:15 +00:00 · d112206004
parent ed8a114c86
commit d112206004
1 changed files with 1 additions and 1 deletions
--- 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)));