libstdc++: Minor codegen improvement for atomic wait spinloop

[Jonathan Wakely]

On Wed, 6 Jul 2022 at 22:42, Thomas Rodgers <trodgers@redhat.com> wrote:
>
> Ok for trunk? backport?

Yes, for all branches that have the atomic wait code.


>
> On Wed, Jul 6, 2022 at 1:56 PM Jonathan Wakely <jwakely@redhat.com> wrote:
>>
>> On Wed, 6 Jul 2022 at 02:05, Thomas Rodgers via Libstdc++
>> <libstdc++@gcc.gnu.org> wrote:
>> >
>> > This patch merges the spin loops in the atomic wait implementation which is
>> > a
>> > minor codegen improvement.
>> >
>> > libstdc++-v3/ChangeLog:
>> >          * include/bits/atomic_wait.h (__atomic_spin): Merge spin loops.
>>
>> OK, thanks.
>>