Fix inelegant initialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131538 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp
index 344fc4f..fbbc952 100644
--- a/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -598,8 +598,7 @@
     unsigned VWidth =
       cast<VectorType>(II->getArgOperand(0)->getType())->getNumElements();
     unsigned LowHalfElts = VWidth / 2;
-    APInt InputDemandedElts(VWidth, 0);
-    InputDemandedElts = InputDemandedElts.getBitsSet(VWidth, 0, LowHalfElts);
+    APInt InputDemandedElts(APInt::getBitsSet(VWidth, 0, LowHalfElts));
     APInt UndefElts(VWidth, 0);
     if (Value *TmpV = SimplifyDemandedVectorElts(II->getArgOperand(0),
                                                  InputDemandedElts,