Re: Cgraph alias reorg 15/14 (New infrastructure for same body aliases)

[Jan Hubicka <hubicka@ucw.cz>]

> > On Sat, 11 Jun 2011, Jan Hubicka wrote:
> > 
> > > Hi,
> > > this patch complettes the same body alias rework by removing the old same body
> > > alias code and adding new representation.  Same body aliases are now separate
> > > function nodes that have IPA_REF_ALIAS reference to the node they are alias of.
> > >
> > > I am still getting one failure:
> > > FAIL: g++.dg/torture/pr43879-1_1.C
> > >
> > > It tests IPA PTA in presence of same body aliases.  I honestly have no idea
> > > what is wrong there.  I decided to go ahead with the patch anyway, given the
> > > current state of affair of aliases and IPA-PTA. Hope Richard will help me
> > > fixing this on Monday.
> > 
> > Still there, see again PR49373.  Anything better than a xfail in the works?
> 
> Yes, we discussed the problem with Richi and the issue is that ipa-pta gets
> confused by inliner redirecting edge from alias to the real inline clone.
> The proper fix is to teach passmanager to do small ipa passes before final
> compilation.  I am currently at the GCC gathering, so I plan to implement
> this day after tomorrow after returning.
But for sure we can xfail it.
(It was prevoiusly latent problem and richi did quicker fix but that just
uncovered another problems. Sorry for the delays here).

Honza