"Dependent on" ??? [LWN.net]

"Dependent on" ???

Posted Mar 9, 2007 20:52 UTC (Fri) by massimiliano (subscriber, #3048)
In reply to: "Dependent on" ??? by anton
Parent article: Mitchell Baker and the Firefox Paradox (Inc)

And see it closed as invalid after an hour (less time than it took to do create the bug report).

Interesting discussion in that bug :-)

Anyway, I wrote my suggestion without knowing how gcc development actually works... I would welcome bugs like that opened for the Mono JIT!
At worst, I would mark it as "Wishlist", and keep it open that way...

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"Dependent on" ???

Posted Mar 10, 2007 1:42 UTC (Sat) by nix (subscriber, #2304) [Link]

It seems that fixing this would be ridiculously difficult and not terribly
beneficial (how many programs have you seen that use computed goto? How
much effort is it worth going to to speed it up?)

I'd have kept it open, too, but there is so much low-hanging optimization
fruit in GCC that fixing fairly small one-platform optimization bugs in
rarely-used language extensions isn't going to get much attention at the
best of times.

GCC development actually works in much the same way everything else works
in the free software community: if you have a performance bug in a tiny
obscure feature it's probably not going to get fixed unless you fix it. A
noninvasive patch would probably have made it...

"Dependent on" ???

Posted Apr 7, 2007 20:29 UTC (Sat) by anton (guest, #25547) [Link]

>how many programs have you seen that use computed goto? How
>much effort is it worth going to to speed it up?

Many interpreters are using labels-as-values for a significant
speedup. And a huge number of programs use interpreters.

>one-platform optimization bugs

As far as I understand the reply to the bug report, this bug affects
every platform that does not have a conditional indirect branch, i.e.,
pretty much every platform except PPC and IA64.

>A noninvasive patch would probably have made it...

They consider the bug "invalid", so they probably would not have
accepted the patch, and I am glad that I did not waste my time on
trying to build one.