[Bug middle-end/59448] Code generation doesn't respect C11 address-dependency

[torvald at gcc dot gnu.org]

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  <amacleod@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.