Re: New bootstrap failure on ARM systems

[Jan Hubicka <jh at suse dot cz>]

> > > 
> > > > > It looks to me as though bbro has done a partial recalculation and got it 
> > > > > wrong.
> > > > 
> > > > Hmm, then it must be the cfgcleanup pass just before bbro, as bbro don't
> > > > do any recalculation.
> > > 
> > > It could be.  I was just going on the rtl dump names.
> > > 
> > > >  We can perhaps disable the cfgcleanup when ifcvt
> > > > made CE or make it to recompute whole info fron the scratch?
> > > 
> > > Doesn't the CE pass already do a full recalculation?  If so, it would seem 
> > > that a second one was unnecessary unless further changes were being made.
> > 
> > It is caused by the cfgcleanups and the attached patch fix it by
> > recomputing from scratch.  How expensive it is?
> 
> I've started a full bootstrap with this patch.  I should know by tomorrow 
> roughly what the time penalty is.

Thanks.  I will try to prepare more polished version of patch for this.
Apparently I can't come with anything significantly better.
Sorry for the delay.

Honza
> 
> R.