Fix a ton of comment typos found by codespell.  Patch by
Luis Felipe Strano Moraes!

llvm-svn: 129558
diff --git a/llvm/lib/CodeGen/CodePlacementOpt.cpp b/llvm/lib/CodeGen/CodePlacementOpt.cpp
index e37356a..270c337 100644
--- a/llvm/lib/CodeGen/CodePlacementOpt.cpp
+++ b/llvm/lib/CodeGen/CodePlacementOpt.cpp
@@ -254,7 +254,7 @@
 
   // Determine a position to move orphaned loop blocks to. If TopMBB is not
   // entered via fallthrough and BotMBB is exited via fallthrough, prepend them
-  // to the top of the loop to avoid loosing that fallthrough. Otherwise append
+  // to the top of the loop to avoid losing that fallthrough. Otherwise append
   // them to the bottom, even if it previously had a fallthrough, on the theory
   // that it's worth an extra branch to keep the loop contiguous.
   MachineFunction::iterator InsertPt =