[patch] libstdc++/65913 Handle alignment in __atomic_is_lock_free

[Richard Henderson]

On 09/17/2015 07:04 AM, Jonathan Wakely wrote:
>     Handle alignment in __atomic_is_lock_free
>     
>     gcc:
>     
>     2015-09-17  Richard Henderson  <rth@redhat.com>
>     
>     	PR libstdc++/65913
>     	* builtins.c (fold_builtin_atomic_always_lock_free): Handle fake
>     	pointers that encode the alignment of the object.
>     
>     libstdc++-v3:
>     
>     2015-09-17  Jonathan Wakely  <jwakely@redhat.com>
>     
>     	PR libstdc++/65913
>     	* include/bits/atomic_base.h (__atomic_base<_TTp>::is_lock_free(),
>     	__atomic_base<_PTp*>::is_lock_free()): Call the built-in with the
>     	immediate pointer value, not a variable.
>     	* include/std/atomic (atomic<T>::is_lock_free()): Likewise.
>     	* testsuite/29_atomics/atomic/65913.cc: New.

Yes, this is ok.


r~