Fix spelling of `propagate'.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4423 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp
index 20a4714..22377ba 100644
--- a/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -26,7 +26,7 @@
   // Delete the unneccesary instruction now...
   BI = BIL.erase(BI);
 
-  // Make sure to propogate a name if there is one already...
+  // Make sure to propagate a name if there is one already...
   if (OldName.size() && !V->hasName())
     V->setName(OldName, BIL.getParent()->getSymbolTable());
 }