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From: "haochen.jiang at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113133] [14 Regression] ICE: SIGSEGV in
 mark_label_nuses(rtx_def*) (emit-rtl.cc:3896) with -O -fno-tree-ter -mavx512f
 -march=barcelona
Date: Fri, 29 Dec 2023 07:35:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113133

--- Comment #7 from Haochen Jiang <haochen.jiang at intel dot com> ---
(In reply to Uro=C5=A1 Bizjak from comment #1)
> Created attachment 56962 [details]
> Proposed patch
>=20
> Patch in testing.
>=20
> lowpart_subreg can't handle:
>=20
> lowpart_subreg (V4SFmode, operands[0], DFmode);
>=20
> and
>=20
> lowpart_subreg (V2DFmode, operands[0], SFmode);
>=20
> subreg conversions and will return NULL_RTX for these cases.

I suppose the patch here is ok at least from my initial test.=