From: Richard Henderson <rth@redhat.com>
To: Richard Guenther <rguenther@suse.de>
Cc: uweigand@de.ibm.com, gcc-patches@gcc.gnu.org
Subject: Re: [PATCH 0/2] Convert s390 to atomic optabs, v2
Date: Wed, 01 Aug 2012 19:42:00 -0000 [thread overview]
Message-ID: <50198692.4000904@redhat.com> (raw)
In-Reply-To: <alpine.LNX.2.00.1208011906080.17088@jbgna.fhfr.qr>
On 2012-08-01 10:14, Richard Guenther wrote:
> If you said
>
> p_s->y = 0;
>
> then we can exploit the fact that you dereference p_s and derive
> bigger alignment. But I don't see how we can massage the
> builtin to preserve such form. Well, put in a memory reference
> in the argument, __builtin_compare_exchange (p_s->y, ...), but
> that fails foul of GIMPLE requirements to use a temporary for
> register type function arguments, which we may be able to
> overcome with some special flags.
Ah, right. Well, we'll just have to leave it for gimple_atomic then.
r~
next prev parent reply other threads:[~2012-08-01 19:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-29 21:32 [CFT] s390: Convert from sync to atomic optabs Richard Henderson
2012-07-30 14:19 ` Ulrich Weigand
2012-07-30 15:12 ` Richard Henderson
2012-07-30 15:51 ` Ulrich Weigand
2012-07-30 18:53 ` Richard Henderson
2012-07-30 22:33 ` [PATCH 0/2] Convert s390 to atomic optabs, v2 Richard Henderson
2012-07-30 22:33 ` [PATCH 1/2] s390: Reorg s390_expand_insv Richard Henderson
2012-07-30 22:36 ` [PATCH 2/2] s390: Convert from sync to atomic optabs Richard Henderson
2012-08-06 18:34 ` Ulrich Weigand
2012-08-06 18:51 ` Richard Henderson
2012-08-06 19:45 ` Richard Henderson
2012-08-06 22:40 ` s390: Avoid CAS boolean output inefficiency Richard Henderson
2012-08-07 17:02 ` Ulrich Weigand
2012-08-07 22:13 ` Richard Henderson
2012-08-08 18:05 ` Ulrich Weigand
2012-08-09 16:55 ` Eric Botcazou
2012-07-31 9:11 ` [PATCH 0/2] Convert s390 to atomic optabs, v2 Richard Guenther
2012-07-31 15:27 ` Andrew MacLeod
2012-07-31 16:07 ` Richard Henderson
2012-08-01 8:41 ` Richard Guenther
2012-08-01 15:59 ` Richard Henderson
2012-08-01 17:14 ` Richard Guenther
2012-08-01 19:42 ` Richard Henderson [this message]
2012-07-31 18:36 ` Ulrich Weigand
2012-07-31 19:54 ` Richard Henderson
2012-08-01 23:23 ` Richard Henderson
2012-08-03 12:20 ` Ulrich Weigand
2012-08-03 14:21 ` Ulrich Weigand
2012-08-06 16:44 ` Ulrich Weigand
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