https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3507
--- Comment #70 from Drea Pinski <pinskia at gcc dot gnu.org> --- (In reply to Uroš Bizjak from comment #68) > For the testcase in the Comment #0, we can use this PoC i386 patch: Right for x86 where sub always sets the CC, this will definitely be useful. I wonder if most of the define_expand for x86 should instead of just `clobber CC`, express what the CC is set to. I think that is kind of how the old CC0 worked even. I think this is true of the 68k backend and the AVR backend should be done a similar fashion (I think the AVR backend was CC0 at one point).
