pass the address of MaskedValueIsZero into isMaskedValueZeroForTargetNode,
to permit recursion


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25799 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 218e130..0e061b9 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -462,7 +462,7 @@
     return (Mask & (MVT::getSizeInBits(Op.getValueType())*2-1)) == 0;
   default:
     if (Op.getOpcode() >= ISD::BUILTIN_OP_END)
-      return TLI.isMaskedValueZeroForTargetNode(Op, Mask);
+      return TLI.isMaskedValueZeroForTargetNode(Op, Mask, MaskedValueIsZero);
     break;
   }
   return false;