[PATCH] [libstdc++] Remove unused hasher instance.

Thomas Rodgers trodgers@redhat.com
Tue Jun 8 23:04:10 GMT 2021


Tested x86_64-pc-linux-gnu, committed to master, backported to
releases/gcc-11.

On Fri, Jun 4, 2021 at 1:30 PM Jonathan Wakely <jwakely@redhat.com> wrote:

>
>
> On Fri, 4 Jun 2021 at 20:54, Thomas Rodgers wrote:
>
>> This is a remnant of poorly executed refactoring.
>>
>
> OK for trunk and gcc-11, thanks.
>
>
>
>> libstdc++-v3/ChangeLog:
>>
>>         * include/std/barrier (__tree_barrier::_M_arrive): Remove
>>         unnecessary hasher instantiation.
>> ---
>>  libstdc++-v3/include/std/barrier | 1 -
>>  1 file changed, 1 deletion(-)
>>
>> diff --git a/libstdc++-v3/include/std/barrier
>> b/libstdc++-v3/include/std/barrier
>> index fd61fb4f9da..4210e30d1ce 100644
>> --- a/libstdc++-v3/include/std/barrier
>> +++ b/libstdc++-v3/include/std/barrier
>> @@ -103,7 +103,6 @@ It looks different from literature pseudocode for two
>> main reasons:
>>                            static_cast<__barrier_phase_t>(__old_phase_val
>> + 2);
>>
>>         size_t __current_expected = _M_expected;
>> -       std::hash<std::thread::id> __hasher;
>>         __current %= ((_M_expected + 1) >> 1);
>>
>>         for (int __round = 0; ; ++__round)
>> --
>> 2.26.2
>>
>>


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