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[Bug target/15184] [4.6/4.7/4.8 Regression] Direct access to byte inside word not working with -march=pentiumpro
- From: "steven at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 11 Nov 2012 21:24:36 +0000
- Subject: [Bug target/15184] [4.6/4.7/4.8 Regression] Direct access to byte inside word not working with -march=pentiumpro
- Auto-submitted: auto-generated
- References: <bug-15184-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15184
Steven Bosscher <steven at gcc dot gnu.org> changed:
What |Removed |Added
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CC|steven at gcc dot gnu.org |
--- Comment #23 from Steven Bosscher <steven at gcc dot gnu.org> 2012-11-11 21:24:36 UTC ---
(In reply to comment #21)
> (In reply to comment #20)
>
> > Please can the RMs have a new look at this.
>
> This is tuning decision, and I see Intel folks in the CC. I see no problem
> in changing these defaults, if they are supported by some benchmark results.
The original report was probably a tuning issue, but the code from
comment #13 (which is similar to what trunk produces) looks like more
than a tuning issue to me.