m68k.c (m68k_sched_dfa_post_advance_cycle): Support starting scheduling from a pre-existing state.

	* config/m68k/m68k.c (m68k_sched_dfa_post_advance_cycle): Support
	starting scheduling from a pre-existing state.

From-SVN: r191171

gcc/ChangeLog

+2012-09-10  Maxim Kuvyrkov  <maxim@codesourcery.com>
+
+	* config/m68k/m68k.c (m68k_sched_dfa_post_advance_cycle): Support
+	starting scheduling from a pre-existing state.
+
 2012-09-10  Diego Novillo  <dnovillo@google.com>
 
 	* vec.h (vec_t::quick_push): Remove overload that accepts 'T *'.

gcc/config/m68k/m68k.c

@@ -6269,7 +6269,8 @@ m68k_sched_dfa_post_advance_cycle (void)
   while (--i >= 0)
     {
       if (state_transition (curr_state, sched_ib.insn) >= 0)
-	gcc_unreachable ();
+	/* Pick up scheduler state.  */
+	++sched_ib.filled;
     }
 }