This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: [tree-ssa][unit-at-a-time] bootstrap
- From: Daniel Berlin <dberlin at dberlin dot org>
- To: judd dot jenne at charter dot net
- Cc: Andrew Pinski <pinskia at physics dot uc dot edu>, gcc at gcc dot gnu dot org
- Date: Sat, 30 Aug 2003 22:58:08 -0400 (EDT)
- Subject: Re: [tree-ssa][unit-at-a-time] bootstrap
- References: <web-3239613@rems08.cluster1.charter.net>
On Sat, 30 Aug 2003 judd.jenne@charter.net wrote:
> Andrew,
>
> First of all, thank you for looking into this.
>
> I produced these using an ssa compiler from the last few
> hours. I hope this helps.
>
> I used something like -fdump-tree-all. I didn't include
> dumps that
> seemed identical to those prior.
>
> It seems that rewrite_out_of_ssa() seems a likely culprit
> from examining
> dumps .dce and .optimized.
>
> Off Topic:
>
> Pre seems to leave alot of (void)0;. Are these required?
PRE didn't do that.
PRE actually doesn't delete any code, it relies on DCE to do it.
What you are seeing is a result of the fact that DCE is run twice, but
both runs have their stats dumped to the same dump file (.t10, IIRC).