re PR rtl-optimization/54792 (-fcompare-debug failures introduced by r191493)

	PR rtl-optimization/54792
	* sched-deps.c (find_modifiable_mems): Scan also TAIL insn.

From-SVN: r192038

gcc/ChangeLog

+2012-10-03  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/54792
+	* sched-deps.c (find_modifiable_mems): Scan also TAIL insn.
+
 2012-10-02  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/54785

gcc/sched-deps.c

@@ -4816,10 +4816,10 @@ find_mem (struct mem_inc_info *mii, rtx *address_of_x)
 void
 find_modifiable_mems (rtx head, rtx tail)
 {
-  rtx insn;
+  rtx insn, next_tail = NEXT_INSN (tail);
   int success_in_block = 0;
 
-  for (insn = head; insn != tail; insn = NEXT_INSN (insn))
+  for (insn = head; insn != next_tail; insn = NEXT_INSN (insn))
     {
       struct mem_inc_info mii;