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[Bug tree-optimization/30194] [4.3 Regression] alias set partitioning dependent on SFT DECL_UIDs
- From: "dnovillo at google dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 8 Jan 2008 17:06:48 -0000
- Subject: [Bug tree-optimization/30194] [4.3 Regression] alias set partitioning dependent on SFT DECL_UIDs
- References: <bug-30194-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #19 from dnovillo at google dot com 2008-01-08 17:06 -------
Subject: Re: [4.3 Regression] alias set partitioning dependent on SFT
DECL_UIDs
> I don't think anything is wrong with 'alias set partitioning dependent on SFT
> DECL_UIDs'. If two SFTs score equal we need to discriminate them somehow.
> DECL_UID is exactly the right thing to use for this.
>
> Note that
>
> 2007-10-25 Richard Guenther <rguenther@suse.de>
>
> ...
> * tree-ssa-alias.c (mem_sym_stats): ... here and make it static.
> ...
> (compare_mp_info_entries): Make sort stable by disambiguating
> on DECL_UID.
>
> might have improved the situation. Or worsened it.
>
> The question would be - why should the DECL_UIDs for SFTs change
> spontaneously?
Bother. I thought I was replying to a different PR (33237). No, I
don't think I'll work on this PR. I agree with Richard's assessment.
Diego.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30194