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Re: [PATCH]: Allocate bbs/edges using pool
On Thu, 2 Jan 2003, Andreas Jaeger wrote:
>
> Daniel,
>
> did you bootstrap and regtest the patch?
Yes, on i686-pc-linux-gnu and powerpc-apple-darwin6.3
>On which platforms? Does it
> give any performance improvements?
Yes, it improves performance between 1 and 10%, depending on platform, on
testcases i have with more than 1000 bb's.
The et-forest patch I submitted weeks ago does more, improving performance
10-15% on testcases i have that consist of mainly generated code (IE where
you end up with dominator computation being 10-20 seconds, it's now 10,
rather than 20).
Even if it gave 0% performance improvement (and no performance loss), it
still removes a lot of ad-hoc code in favor of a standardized interface,
and removes usage of the flow_obstack.
> > Daniel Berlin <dberlin@dberlin.org> writes:
>
> > 2002-12-30 Daniel Berlin <dberlin@dberlin.org>
> >
> > * cfg.c: Include alloc-pool.h
> > (edge_pool): New pool.
> > (bb_pool): New pool.
> > (first_deleted_edge): Remove.
> > (first_deleted_block): Remove.
> > (init_flow): Alloc/free the pools.
> > (free_edge): Use pools.
> > (alloc_block): Ditto.
> > (expunge_block): Ditto.
> > (cached_make_edge): Ditto.
> > [...]
>
> Andreas
> --
> Andreas Jaeger
> SuSE Labs aj@suse.de
> private aj@arthur.inka.de
> http://www.suse.de/~aj
>