[committed] Fix unused argument error in expr.c

[John David Anglin]

The attached change fixes a build error on hppa-unknown-linux-gnu.  Committed 
as obvious.

Dave
--
John David Anglin       dave.ang...@bell.net



2016-06-05  John David Anglin  <dang...@gcc.gnu.org>

        * expr.c (move_by_pieces_d::generate): Mark mode parameter with
        ATTRIBUTE_UNUSED.

Index: expr.c
===================================================================
--- expr.c      (revision 237097)
+++ expr.c      (working copy)
@@ -1143,7 +1143,8 @@
    gen function that should be used to generate the mode.  */
 
 void
-move_by_pieces_d::generate (rtx op0, rtx op1, machine_mode mode)
+move_by_pieces_d::generate (rtx op0, rtx op1,
+                           machine_mode mode ATTRIBUTE_UNUSED)
 {
 #ifdef PUSH_ROUNDING
   if (op0 == NULL_RTX)