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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/113576] [14 regression] 502.gcc_r hangs 
 r14-8223-g1c1853a70f9422169190e65e568dcccbce02d95c
Date: Wed, 14 Feb 2024 13:59:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113576

--- Comment #50 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #49)
> (In reply to Uro=C5=A1 Bizjak from comment #48)
> > The runtime testcase fails on non-AVX512F x86 targets due to:
> >=20
> > /* { dg-do run } */
> > /* { dg-options "-O3" } */
> > /* { dg-additional-options "-march=3Dskylake-avx512" { target { x86_64-=
*-*
> > i?86-*-* } } } */
> >=20
> > but check_vect() only checks runtime support up to AVX2.
>=20
> Hmm, can we fix that?  We could change the above to { target avx512f_runt=
ime
> }
> but that really only checks for AVX512F, not say AVX512VL ...
>=20
> I do remember using -mavx512vl wasn't enough to trigger the miscompile
> nor did it trigger with -march=3Dznver4 ... so I stuck to skylake-avx512 =
:/

It is certainly preferable to add -mavx512{bw,dq,vl} or whatever the testca=
se
actually needs and then one can
#define AVX512BW
#define AVX512DQ
#define AVX512VL
#include "avx512-check.h"
and get checks for all those.=