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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/92080] Missed CSE of _mm512_set1_epi8(c) with
 _mm256_set1_epi8(c)
Date: Sat, 04 Sep 2021 22:17:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D92080

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2019-10-14 00:00:00         |2021-9-4
           Severity|normal                      |enhancement

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This gives good code:
#include <immintrin.h>

__m512i sinkz;
__m256i sinky;
void foo(char c) {
    __m512i a =3D _mm512_set1_epi8(c);
    sinkz =3D a;
    sinky =3D *((__m256i*)&a);
}=