Fix assert caused by bad cfg manipulation in bfin.

	PR target/66620
	* config/bfin/bfin.c (hwloop_optimize): Create new bb between jump and
	loop start when inserting LSETUP.

From-SVN: r225453

gcc/ChangeLog

+2015-07-06  Bernd Schmidt  <bernds@codesourcery.com>
+
+	PR target/66620
+	* config/bfin/bfin.c (hwloop_optimize): Create new bb between jump and
+	loop start when inserting LSETUP.
+
 2015-07-06  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/53383

gcc/config/bfin/bfin.c

@@ -3796,8 +3796,19 @@ hwloop_optimize (hwloop_info loop)
 	{
 	  gcc_assert (JUMP_P (prev));
 	  prev = PREV_INSN (prev);
+	  emit_insn_after (seq, prev);
+	}
+      else
+	{
+	  emit_insn_after (seq, prev);
+	  BB_END (loop->incoming_src) = prev;
+	  basic_block new_bb = create_basic_block (seq, seq_end,
+						   loop->head->prev_bb);
+	  edge e = loop->incoming->last ();
+	  gcc_assert (e->flags & EDGE_FALLTHRU);
+	  redirect_edge_succ (e, new_bb);
+	  make_edge (new_bb, loop->head, 0);
 	}
-      emit_insn_after (seq, prev);
     }
   else
     {