--- gcc/modulo-sched.c	(/gcc-local/trunk)	(revision 30596)
+++ gcc/modulo-sched.c	(/gcc-local/export-ddg)	(revision 30596)
@@ -652,10 +653,19 @@ generate_prolog_epilog (partial_schedule
   /* Generate the prolog, inserting its insns on the loop-entry edge.  */
   start_sequence ();
 
-  if (count_reg)
    /* Generate a subtract instruction at the beginning of the prolog to
       adjust the loop count by STAGE_COUNT.  */
-   emit_insn (gen_sub2_insn (count_reg, GEN_INT (last_stage)));
+  if (count_reg)
+    {
+      rtx sub_reg = NULL_RTX;
+
+      sub_reg = expand_simple_binop (GET_MODE (count_reg), MINUS,
+                                     count_reg, GEN_INT (last_stage),
+                                     count_reg, 1, OPTAB_DIRECT);
+      gcc_assert (REG_P (sub_reg));
+      if (REGNO (sub_reg) != REGNO (count_reg))
+        emit_move_insn (count_reg, sub_reg);
+    }
 
   for (i = 0; i < last_stage; i++)
     duplicate_insns_of_cycles (ps, 0, i, 1);