From: Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz>
To: Geoff Keating <geoffk@geoffk.org>
Cc: "gcc@gcc.gnu.org" <gcc@gcc.gnu.org>
Subject: Re: [tree-ssa] Garbage collector x bb annotations
Date: Wed, 08 Oct 2003 21:37:00 -0000 [thread overview]
Message-ID: <20031008213722.GA22848@atrey.karlin.mff.cuni.cz> (raw)
In-Reply-To: <jmoewrza7x.fsf@desire.geoffk.org>
Hello,
> > > > I have just run into the following problem: dom_children get released by
> > > > ggc_collect call in tree-ssa-pre. Allocating them by ggc seems wrong to
> > > > me, since basic block annotations are allocated from obstack and
> > > > invisible to garbage collector.
> > > >
> > > Yeah. But there's more than that, unfortunately. All the fields in
> > > struct bb_ann_d are ggc allocated. The real solution would be to
> > > finally convert basic blocks to ggc. Volunteers?
> >
> > I may try (I need it anyway for tree-ssa-cfg branch). The whole issue
> > is however quite ugly as this combines basically all allocation
> > mechanisms that are available in gcc (basic blocks themselves are pool
> > allocated).
>
> It's not that ugly to make the fix, you simply have to throw out all
> those other allocation mechanisms and use ggc.
that's not really a good idea. Their purpose is to improve data
locality, and changing this would slow down things.
Zdenek
next prev parent reply other threads:[~2003-10-08 21:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-06 22:31 Zdenek Dvorak
2003-10-07 2:53 ` Daniel Berlin
2003-10-08 13:27 ` Diego Novillo
2003-10-08 13:53 ` Zdenek Dvorak
2003-10-08 14:02 ` Diego Novillo
2003-10-08 14:17 ` Daniel Berlin
2003-10-08 21:30 ` Geoff Keating
2003-10-08 22:34 ` Daniel Berlin
2003-10-08 22:49 ` Geoff Keating
2003-10-09 14:42 ` Zdenek Dvorak
2003-10-08 21:32 ` Geoff Keating
2003-10-08 21:37 ` Zdenek Dvorak [this message]
2003-10-08 22:58 ` Geoff Keating
2003-10-08 23:01 ` Daniel Berlin
2003-10-09 0:03 ` David Edelsohn
2003-10-08 23:05 ` Zdenek Dvorak
2003-10-08 23:10 ` Daniel Berlin
2003-10-08 23:12 ` Zdenek Dvorak
2003-10-09 3:31 ` Jeff Sturm
2003-10-08 13:58 S. Bosscher
2003-10-08 14:03 ` Diego Novillo
2003-10-08 14:03 S. Bosscher
2003-10-08 14:19 ` Daniel Berlin
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