https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59448
torvald at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #25 from torvald at gcc dot gnu.org ---
(In reply to Andrew Macleod from comment #24)
> Author: amacleod
> Date: Wed Jan 14 13:58:35 2015
> New Revision: 219601
>
> URL: https://gcc.gnu.org/viewcvs?rev=219601&root=gcc&view=rev
> Log:
>
> 2015-01-14 Andrew MacLeod <amacl...@redhat.com>
>
> PR middle-end/59448
> * builtins.c (get_memmodel): Promote consume to acquire always.
> * testsuite/gcc.dg/atomic-invalid.c: Remove obselete test for illegal
> consume in an atomic_exchange.
To summarize, Jeff Preshing confirmed that Andrew's patch fixes the problem
(see Comment 23). Everyone in ISO C++ seems to agree that promoting consume to
acquire is the right approach until we have a different language-level facility
that is actually implementable. Therefore, I'm closing this as fixed.
