[Bug bootstrap/45445] [4.6 regression] ARM bootstrap failure: comparison failures after stage 3

[bernds at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45445

--- Comment #22 from Bernd Schmidt <bernds at gcc dot gnu.org> 2010-09-27 
12:45:36 UTC ---
Thanks, that's very well done.  I've investigated a bit, and it seems the
sequence

  mark_pseudo_regno_live (REGNO (reg));
  mark_pseudo_regno_live (REGNO (dreg));
  mark_pseudo_regno_dead (REGNO (reg));
  mark_pseudo_regno_dead (REGNO (dreg));

in make_pseudo_conflict is breaking lifetimes of subwords of one of the DImode
registers.  Not entirely sure yet how to fix it, but I'll think of something.