ira-costs.c: Fix typo in comment.

2014-05-16  Zhouyi Zhou <yizhouzhou@ict.ac.cn>

        * ira-costs.c: Fix typo in comment.

From-SVN: r210525

gcc/ChangeLog

+2014-05-16  Zhouyi Zhou <yizhouzhou@ict.ac.cn>
+
+	* ira-costs.c: Fix typo in comment.
+
 2014-05-16  David Wohlferd <dw@LimeGreenSocks.com>
 
 	 * doc/extend.texi: (Visibility Pragmas) Fix misplaced @xref

gcc/ira-costs.c

@@ -1909,7 +1909,7 @@ find_costs_and_classes (FILE *dump_file)
 
 /* Process moves involving hard regs to modify allocno hard register
    costs.  We can do this only after determining allocno class.  If a
-   hard register forms a register class, than moves with the hard
+   hard register forms a register class, then moves with the hard
    register are already taken into account in class costs for the
    allocno.  */
 static void