http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56950
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Steven Bosscher from comment #7)
> Index: haifa-sched.c
> ===================================================================
> --- haifa-sched.c (revision 199028)
> +++ haifa-sched.c (working copy)
> @@ -7435,20 +7435,19 @@ find_fallthru_edge_from (basic_block pre
> static void
> sched_extend_bb (void)
> {
> - rtx insn;
> -
> /* The following is done to keep current_sched_info->next_tail non null.
> */
> - insn = BB_END (EXIT_BLOCK_PTR->prev_bb);
> + rtx end = BB_END (EXIT_BLOCK_PTR->prev_bb);
> + rtx insn = DEBUG_INSN_P (end) ? prev_nondebug_insn (end) : end;
> if (NEXT_INSN (insn) == 0
This should be NEXT_INSN (end) == 0
> || (!NOTE_P (insn)
> && !LABEL_P (insn)
> /* Don't emit a NOTE if it would end up before a BARRIER. */
> && !BARRIER_P (NEXT_INSN (insn))))
and this && !BARRIER_P (NEXT_INSN (end))))
> {
> - rtx note = emit_note_after (NOTE_INSN_DELETED, insn);
> - /* Make insn appear outside BB. */
> + rtx note = emit_note_after (NOTE_INSN_DELETED, end);
> + /* Make note appear outside BB. */
> set_block_for_insn (note, NULL);
> - BB_END (EXIT_BLOCK_PTR->prev_bb) = insn;
> + BB_END (EXIT_BLOCK_PTR->prev_bb) = end;
> }
> }
