commit 3f96d70ce7f31d556b995733b44cb8715b64e329
author Thorsten Behrens <thorsten.behrens@allotropia.de> Mon Jan 31 22:45:37 2022 +0100
committer Xisco Fauli <xiscofauli@libreoffice.org> Thu Feb 03 17:54:35 2022 +0100
tree 88872c80e2c0174a2fe7b39b2028828f2aa74fe1
parent d036ea9651c05a2a50794bc5c0ee7ea54708ad6a

Avoid calling AVX code in library static initialization

Despite 26072b8db7ba53f00c83197cb064229a76001989 and
12c6b1ef6a824b09778163ec83fc44bb196e65db, Linux builds using
RH devtoolset-7 gcc7 still hit occasional unit test crashes
with illegal instructions.

Backtrace is always:

> #0  __static_initialization_and_destruction_0 (__initialize_p=1, __priority=65535) at core/sc/source/core/tool/arraysumAVX.cxx:20
> #1  _GLOBAL__sub_I_arraysumAVX.cxx(void) () at core/sc/source/core/tool/arraysumAVX.cxx:112
>

So lets make sure initializer is run only on function entry.

Change-Id: I69f5cb725e4d72fb346166b21870612473f974b8
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/129246
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>
(cherry picked from commit d140817428cdbb519efa496f578bf6c054c94361)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/129251
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

sc/source/core/tool/arraysumAVX.cxx

diff --git a/sc/source/core/tool/arraysumAVX.cxx b/sc/source/core/tool/arraysumAVX.cxx
index e256248..4d9ee02 100644
--- a/sc/source/core/tool/arraysumAVX.cxx
+++ b/sc/source/core/tool/arraysumAVX.cxx
@@ -30,7 +30,7 @@ using namespace AVX;
  */
static inline void sumAVX(__m256d& sum, __m256d& err, const __m256d& value)
{
    const __m256d ANNULATE_SIGN_BIT
    static const __m256d ANNULATE_SIGN_BIT
        = _mm256_castsi256_pd(_mm256_set1_epi64x(0x7FFF'FFFF'FFFF'FFFF));
    // Temporal parameter
    __m256d t = _mm256_add_pd(sum, value);