This is the mail archive of the mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Put scope blocks on a diet

Alexandre Oliva wrote:

>> there is a 50% increase in memory consumption and a 5% increase in
>> compile-time for tramp3d.

> For the record, two points:

Alexandre, please take the rhetoric down a notch.  I know you have
strong feelings about this, but you're among friends. :-)

> 1. this patch prevents non-empty blocks with referenced variables from
> being dropped.  This was a bug, and it may have given the impression
> that the memory reductions achieved through the earlier, buggy patch
> that IIRC went in on July 24 was correct.  But dropping too much
> information was a mistake.  We could decide it's ok and desirable to
> drop such information, but it has to be a conscious decision, not an
> accidental fallout from a bug.

That certainly makes sense.  Do you have a URL for the July 24 patch?

Meanwhile, please revert your patch.  We don't want to oscillate too
much.  Is there a PR for the problem that your patch fixed?  If not,
please sure that there is one.

> I don't think letting -g or -g0 affect the executable code output by
> the compiler is acceptable.

I don't either.  But, we don't have agreement on how best to solve the
problem.  So, let's a get PR open, which will help ensure we solve the
problem before the release, and then let's talk about how we can solve it.


Mark Mitchell
(650) 331-3385 x713

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]