Typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129970 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp
index 93e3adc3..b2fd6e0 100644
--- a/lib/CodeGen/RegAllocFast.cpp
+++ b/lib/CodeGen/RegAllocFast.cpp
@@ -97,7 +97,7 @@
       // immediately without checking aliases.
       regFree,
 
-      // A reserved register has been assigned expolicitly (e.g., setting up a
+      // A reserved register has been assigned explicitly (e.g., setting up a
       // call parameter), and it remains reserved until it is used.
       regReserved