Fix comment.

llvm-svn: 121285
diff --git a/llvm/lib/CodeGen/RegAllocFast.cpp b/llvm/lib/CodeGen/RegAllocFast.cpp
index ede5dc4..58ab0bf 100644
--- a/llvm/lib/CodeGen/RegAllocFast.cpp
+++ b/llvm/lib/CodeGen/RegAllocFast.cpp
@@ -334,7 +334,7 @@
     MO.setIsKill();
     return;
   default:
-    // The physreg was allocated to a virtual register. That means to value we
+    // The physreg was allocated to a virtual register. That means the value we
     // wanted has been clobbered.
     llvm_unreachable("Instruction uses an allocated register");
   }