Index: lib/Transforms/Vectorize/LoopVectorize.cpp
===================================================================
--- lib/Transforms/Vectorize/LoopVectorize.cpp
+++ lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -6096,7 +6096,7 @@
 
   WidestRegister = std::min(WidestRegister, MaxSafeRegisterWidth);
 
-  unsigned MaxVectorSize = WidestRegister / WidestType;
+  unsigned MaxVectorSize = WidestRegister / SmallestType;
 
   DEBUG(dbgs() << "LV: The Smallest and Widest types: " << SmallestType << " / "
                << WidestType << " bits.\n");