[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 #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #5)
> I think we can just check DF_INSN_LUIDs here to catch this case.  My systems
> are busy right now, but I should be able to nail this down as soon as one
> frees up.

But is DF_INSN_LUID always computed?  I mean, for -O2 it probably is, but what
about -O -free ?  For -O I think the live problem isn't on and thus I think
DF_INSN_LUID isn't computed.  The DF documentation is unfortunately
non-existent :(.