Fix typo

llvm-svn: 151901
diff --git a/polly/lib/CodeGeneration.cpp b/polly/lib/CodeGeneration.cpp
index fa896f2..1bc2f92 100644
--- a/polly/lib/CodeGeneration.cpp
+++ b/polly/lib/CodeGeneration.cpp
@@ -668,7 +668,7 @@
                                      ValueMapT &VectorMap,
                                      VectorValueMapT &ScalarMaps,
                                      int VectorDimension) {
-  // Terminator instructions control the control flow. They are explicitally
+  // Terminator instructions control the control flow. They are explicitly
   // expressed in the clast and do not need to be copied.
   if (Inst->isTerminator())
     return;