Fix typos.

Pointed out by: Sebastian Pop  <sebpop@gmail.com>

llvm-svn: 154337
diff --git a/polly/lib/ScheduleOptimizer.cpp b/polly/lib/ScheduleOptimizer.cpp
index f938bea..01630aa 100644
--- a/polly/lib/ScheduleOptimizer.cpp
+++ b/polly/lib/ScheduleOptimizer.cpp
@@ -291,7 +291,7 @@
 //
 // This transformation creates a loop at the innermost level. The loop has a
 // constant number of iterations, if the number of loop iterations at
-// DimToVectorize can be devided by VectorWidth. The default VectorWidth is
+// DimToVectorize can be divided by VectorWidth. The default VectorWidth is
 // currently constant and not yet target specific. This function does not reason
 // about parallelism.
 static isl_map *getPrevectorMap(isl_ctx *ctx, int DimToVectorize,