Add support to BBVectorize for vectorizing selects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154700 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Transforms/Vectorize.h

@@ -43,6 +43,9 @@ struct VectorizeConfig {
   /// @brief Vectorize the fused-multiply-add intrinsic.
   bool VectorizeFMA;
 
+  /// @brief Vectorize select instructions.
+  bool VectorizeSelect;
+
   /// @brief Vectorize loads and stores.
   bool VectorizeMemOps;