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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109807] [14 Regression] sse2-mmx-pmaddwd.c met ICE after
 commit r14-666-g608e7f3ab47 with march=cascadelake
Date: Thu, 11 May 2023 07:25:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109807

--- Comment #2 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
(In reply to Haochen Jiang from comment #1)
> I further checked the reason, V2SI should never dropped into that function
> because we have no pattern under V2SI.
>=20
> I suppose it is because -march=3Dcascadelake will open SSE4.1, with the n=
ew
> pattern, it wrongly dropped into that.
>=20
> -m32 will not ICE since TARGET_MMX_WITH_SSE need 64 bit and won't enable =
the
> new pattern.

V2SI mul was introduced in r14-493 (AKA partial fix for PR109690).=