I believe this has introduced a build failure with GCC 12.2 on Debian 12.1:
Building target 'jdk' in configuration '/home/fw/build/jdk'
In file included from /usr/lib/gcc/x86_64-linux-gnu/12/include/immintrin.h:49,
from
…/jdk/src/java.base/linux/native/libsimdsort/avx512-common-qsort.h:60,
from
…/jdk/src/java.base/linux/native/libsimdsort/avx512-32bit-qsort.hpp:31,
from
…/jdk/src/java.base/linux/native/libsimdsort/avx512-linux-qsort.cpp:26:
In function '__m512i _mm512_shuffle_epi32(__m512i, _MM_PERM_ENUM)',
inlined from 'static zmm_vector<int>::zmm_t zmm_vector<int>::shuffle(zmm_t)
[with unsigned char mask = 177]' at
…/jdk/src/java.base/linux/native/libsimdsort/avx512-32bit-qsort.hpp:96:36,
inlined from 'zmm_t sort_zmm_32bit(zmm_t) [with vtype = zmm_vector<int>;
zmm_t = __vector(8) long long int]' at
…/jdk/src/java.base/linux/native/libsimdsort/avx512-32bit-qsort.hpp:170:27:
/usr/lib/gcc/x86_64-linux-gnu/12/include/avx512fintrin.h:4459:50: error: '__Y'
is used uninitialized [-Werror=uninitialized]
4459 | return (__m512i) __builtin_ia32_pshufd512_mask ((__v16si) __A,
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
4460 | __mask,
| ~~~~~~~
4461 | (__v16si)
| ~~~~~~~~~
4462 |
_mm512_undefined_epi32 (),
|
~~~~~~~~~~~~~~~~~~~~~~~~~~
4463 | (__mmask16) -1);
| ~~~~~~~~~~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/12/include/avx512fintrin.h: In function 'zmm_t
sort_zmm_32bit(zmm_t) [with vtype = zmm_vector<int>; zmm_t = __vector(8) long
long int]':
/usr/lib/gcc/x86_64-linux-gnu/12/include/avx512fintrin.h:206:11: note: '__Y'
was declared here
206 | __m512i __Y = __Y;
| ^~~
