Correct comment pasto

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81896 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/CodeGen/RegisterScavenging.h b/include/llvm/CodeGen/RegisterScavenging.h
index 511b8bb..7aa1086 100644
--- a/include/llvm/CodeGen/RegisterScavenging.h
+++ b/include/llvm/CodeGen/RegisterScavenging.h
@@ -121,7 +121,7 @@
   /// isReserved - Returns true if a register is reserved. It is never "unused".
   bool isReserved(unsigned Reg) const { return ReservedRegs.test(Reg); }
 
-  /// isUsed / isUsed - Test if a register is currently being used.
+  /// isUsed / isUnused - Test if a register is currently being used.
   ///
   bool isUsed(unsigned Reg) const   { return !RegsAvailable.test(Reg); }
   bool isUnused(unsigned Reg) const { return RegsAvailable.test(Reg); }