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Re: [PATCH 0/2] Convert s390 to atomic optabs, v2

From: Richard Henderson <rth at redhat dot com>
To: Richard Guenther <rguenther at suse dot de>
Cc: uweigand at de dot ibm dot com, gcc-patches at gcc dot gnu dot org
Date: Tue, 31 Jul 2012 08:44:08 -0700
Subject: Re: [PATCH 0/2] Convert s390 to atomic optabs, v2
References: <5016C81E.5020709@redhat.com> <1343687574-3244-1-git-send-email-rth@redhat.com> <alpine.LNX.2.00.1207311053340.17088@jbgna.fhfr.qr>

On 2012-07-31 02:09, Richard Guenther wrote:
> What do we expect __builtin_compare_exchange to do for
> unaligned inputs?

At the moment we expect it to SIGBUS, as a rule.

We'd *like* to defer to the library routine for unaligned,
but we don't do that yet.

Too bad about not being able to query addresses/ssa_names
for their alignment; I thought we could do that already.

r~

References:
- Re: [CFT] s390: Convert from sync to atomic optabs
  - From: Richard Henderson
- [PATCH 0/2] Convert s390 to atomic optabs, v2
  - From: Richard Henderson
- Re: [PATCH 0/2] Convert s390 to atomic optabs, v2
  - From: Richard Guenther

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