[llvm] r308460 - {DAGCombine] Convert (Val & Mask) == Mask to Mask.isSubsetof(Val). NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Wed Jul 19 06:39:58 2017
New Revision: 308460

URL: http://llvm.org/viewvc/llvm-project?rev=308460&view=rev
Log:
{DAGCombine] Convert (Val & Mask) == Mask to Mask.isSubsetof(Val). NFCI.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=308460&r1=308459&r2=308460&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Wed Jul 19 06:39:58 2017
@@ -7854,7 +7854,7 @@ SDValue DAGCombiner::GetDemandedBits(SDV
   case ISD::AND: {
     // X & -1 -> X (ignoring bits which aren't demanded).
     ConstantSDNode *AndVal = isConstOrConstSplat(V.getOperand(1));
-    if (AndVal && (AndVal->getAPIntValue() & Mask) == Mask)
+    if (AndVal && Mask.isSubsetOf(AndVal->getAPIntValue()))
       return V.getOperand(0);
     break;
   }