[3.4 - BIB] New loop optimizer, part 1

[Geoff Keating]

Stan Shebs <shebs@apple.com> writes:

> David Edelsohn wrote:
> 
> >>>>>>Zack Weinberg writes:
> >>>>>>
> >
> >Zack> The criteria for BIB are the same as the criteria for stage 2
> >Zack> development.  I personally do not think that a patch of this magnitude
> >Zack> qualifies.
> >
> >	Do you notice how many failures have been introduced on the trunk
> >which is in Stage 3 development?  Those only have been caught and tracked
> >down due to regular bootstraps of the trunk on various targets.  The Basic
> >Improvements Branch is not receiving even that level of coverage, so it is
> >likely that regressions have been introduced.
> >
> Presumably there should be something like a mini Stage 3 for b-i-b
> before it gets pulled into the trunk.  Since the trunk will be in Stage 1
> at that point, some regressions are OK, but it seems like it would be
> easier to identify and fix on b-i-b first.

I believe that part of the rules for merging in from branches are that
the to-be-applied patch (that is, the merge) should be tested on at
least three targets.

-- 
- Geoffrey Keating <geoffk@geoffk.org>