Re: [PATCH 1/4][ARM][PR target/65697][5.1] Backport stronger barriers for __sync fetch-op builtins.

[Ramana Radhakrishnan <ramana.radhakrishnan@foss.arm.com>]

On 27/07/15 11:29, Matthew Wahab wrote:
> 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.
> 

This is OK thanks,

Ramana