[vlc-devel] [PATCH] configure: remove unused and broken AVX tests

[Francois Cartegnie]

Le 14/09/2020 à 20:21, Rémi Denis-Courmont a écrit :
> Le maanantaina 14. syyskuuta 2020, 20.34.12 EEST Francois Cartegnie a écrit :
>> Le 14/09/2020 à 19:28, Rémi Denis-Courmont a écrit :
>>> These tests do not work in either GCC 10 or Clang 9 or earlier.
>>> Unsurprisingly for broken tests, nothing uses their results.
>>
>> Because they are removed, seen as no-op ?
> 
> No, literally nothing uses CAN_COMPILE_AVX.
> In fact, I forgot to remove HAVE_AVX2.
> 
> (HAVE_AVX2_INSTRINSICS is unused, but at least it gets provisoned correctly.)
> 

I meant: the tests are failing because the compiler sees it as no-op (no
output constraint or artificial dependency).

6.47.2.1 Volatile
https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html

-- 
Francois Cartegnie
VideoLAN - VLC Developer