Re: [RFC] Contributing tree-ssa to mainline

[Gerald Pfeifer <gp at suse dot de>]

On Fri, 16 Jan 2004, Diego Novillo wrote:
> First and foremost is the obvious question of whether people think that
> the whole infrastructure is worth adding to GCC at all.  From what we've
> discussed in the past few months, the consensus seems to be that it is. 

Given the number and qualification of those working on tree-ssa
(including many volunteers and full-time GCC hackers from at least
two companies with major interest and contributions to GCC) I think
the answer is "Yes". :-)

> As it is today, it is impossible to build an Ada compiler with the
> branch.

I'm afraid that's a blocker.

> 3- There are several bug reports opened against the branch (92 as of
> today).

I believe the general policy, not specific to tree-ssa, is that everything
that is a regression of a branch compared to mainline blocks the merger of
that branch.

(This is the direct analogon to our patch rules, where a patch with
known regressions must not be applied. In fact, merging a branch is
a large patch.)

> So, there clearly is much work to be done yet.  A very conservative view
> would be to declare the branch still not ripe for inclusion and wait for
> GCC 3.6.

Well, it may not be ripe now (and in fact I'm currently suffering from
code generation bugs on tree-ssa), but how about four, or six, or eight
weeks?

>From my personal point of view, tree-ssa nearly seems be there, in terms
of quality.

Gerald