Fix typos found by http://github.com/lyda/misspell-check

llvm-svn: 157885
diff --git a/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp b/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
index 9cec590..a9de1c7 100644
--- a/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
+++ b/llvm/lib/CodeGen/CriticalAntiDepBreaker.cpp
@@ -228,7 +228,7 @@
 void CriticalAntiDepBreaker::ScanInstruction(MachineInstr *MI,
                                              unsigned Count) {
   // Update liveness.
-  // Proceding upwards, registers that are defed but not used in this
+  // Proceeding upwards, registers that are defed but not used in this
   // instruction are now dead.
 
   if (!TII->isPredicated(MI)) {