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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/104723] [12 regression] Redundant usage of stack
Date: Tue, 01 Mar 2022 08:44:19 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104723

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #0)
> bool f256(char *a)
> {
>   char t[] =3D "012345678901234567890123456789012345678901234567";
>   return __builtin_memcpy(a, &t[0], sizeof(t)) =3D=3D 0;
> }
>=20
> https://godbolt.org/z/jcjbT4d8e
>=20
> gcc12 generates
>=20
>         vmovdqa64       ymm31, YMMWORD PTR .LC0[rip]
>         xor     eax, eax
>         vmovdqu64       YMMWORD PTR [rsp-72], ymm31
>         vmovdqa64       ymm31, YMMWORD PTR .LC1[rip]
>         vmovdqu64       YMMWORD PTR [rsp-55], ymm31
>         vmovdqu64       ymm31, YMMWORD PTR [rsp-72]
STF issue here?=