[tree-ssa] Garbage collector x bb annotations

[Zdenek Dvorak]

Hello,

> >:-) But really, getting things slower just because we are lazy to write
> >10 more lines of code is not a great idea.  I agree there is a terrible
> >mess in memory allocation in gcc, and having this all done by garbage
> >collector would be great, but we should first have a good one (btw. 
> >what
> >I always wondered -- is there not somewhere floating some decent free
> >garbage collector that could be used?)
> 
> Boehm's is slower than what we've got now.
> 
> I'm working on hybrid copying + mark and sweep.
> 
> If you *really* want to improve the gc, however, we need compiler 
> support.

what kind of support do you have in mind?

Zdenek