------- Comment #21 from richard at nildram dot co dot uk 2007-01-06 08:42 ------- Subject: Re: [4.0/4.1 regression] internal consistency failure
"ebotcazou at gcc dot gnu dot org" <[EMAIL PROTECTED]> writes: >> Eric asked me to weigh in here. My only concern about a backport is Comment >> #9, which suggests that the patch didn't work. I'm assuming that since we're >> all talking about backporting it, that comment was mistaken? If indeed there >> are no known problems, I think it's reasonable to put this on 4.1. > > Thanks Mark. It seems that a whole new class of internal consistency failures > due to the mishandling of REG_NOTEs in the combiner appeared in 4.1.x (for > example rtl-optimization/28243 and the blocked rtl-optimization/29329) and up. > Richard's patch is the most generic fix available as of today, so backporting > it or not to the 4.1.x branch has cascading effects on the other PRs. Maybe > the problem reported in comment #9 is another variant. > > Richard, are you still ready to backport it? If so, I can revert my patch for > rtl-optimization/28243 right now to make things easier. Yup, I'm still ready to backport it if the consensus is that the patch is OK for 4.1. I see from later comments that you might be backporting it yourself, but the offer still stands if you haven't started yet. Richard -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25514
