Fix integer cast code to handle vector types.

llvm-svn: 91362
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index aee2f20..027348c 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -5196,7 +5196,7 @@
     // SimplifyDemandedBits, which only works if the value has a single use.
     if (SimplifyDemandedBits(Value,
                              APInt::getLowBitsSet(
-                               Value.getValueSizeInBits(),
+                               Value.getValueType().getScalarType().getSizeInBits(),
                                ST->getMemoryVT().getSizeInBits())))
       return SDValue(N, 0);
   }