Fix typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44997 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index 8da0912..7c7352d 100644
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -929,7 +929,7 @@
   if (Src->hasOneUse())
     return false;
 
-  // Only do this xform is truncating is free.
+  // Only do this xform if truncating is free.
   if (!TLI->isTruncateFree(I->getType(), Src->getType()))
     return false;