[Bug middle-end/59743] [4.9 Regression] ICE: Segmentation fault

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, there is:
  /* If the df_live problem is not defined, such as at -O0 and -O1, we
     still need to keep the luids up to date.  This is normally done
     in the df_live problem since this problem has a forwards
     scan.  */
  if (!df_live)
    df_recompute_luids (bb);
in df_lr_bb_local_compute, so I think luids are fine even at -O0/-O1.