Ping. Updated patch attached.

Also, retested for arm-none-linux-gnueabihf with native bootstrap and make
check and for arm-none-eabi with cross compiled make check.

On 02/07/15 14:12, Matthew Wahab wrote:
> The __sync builtins are implemented using barriers that are too weak for ARMv8
> targets, this has been fixed on trunk for the ARM back-end. Since GCC-5.1 is
> also generating the incorrect code, it should also be fixed.
>
> This patch backports the changes made to strengthen the barriers emitted for
> the __sync fetch-and-op/op-and-fetch builtins.
>
> The trunk patch submission is at
> https://gcc.gnu.org/ml/gcc-patches/2015-06/msg01410.html
> The commit is at https://gcc.gnu.org/ml/gcc-cvs/2015-06/msg01235.html
>
> Tested the series for arm-none-linux-gnueabihf with check-gcc
>
> Ok for the branch?
> Matthew
>
> 2015-07-02  Matthew Wahab  <matthew.wahab@arm.com>
>
>      Backport from trunk:
>      2015-06-29  Matthew Wahab  <matthew.wahab@arm.com>
>
>      PR target/65697
>      * config/armc/arm.c (arm_split_atomic_op): For ARMv8, replace an
>      initial acquire barrier with final barrier.