Index: lib/Transforms/Vectorize/LoopVectorize.cpp
===================================================================
--- lib/Transforms/Vectorize/LoopVectorize.cpp
+++ lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -122,7 +122,7 @@
              "value."));
 
 static cl::opt<bool> MaximizeBandwidth(
-    "vectorizer-maximize-bandwidth", cl::init(false), cl::Hidden,
+    "vectorizer-maximize-bandwidth", cl::init(true), cl::Hidden,
     cl::desc("Maximize bandwidth when selecting vectorization factor which "
              "will be determined by the smallest type in loop."));