From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 28D603858D37; Tue, 9 May 2023 14:49:05 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 28D603858D37 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1683643745; bh=MbNbawZqwlAv94jGB+f+DV9YM70dHEIpyzJDze3cnW4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=GCoZb1bFPxr6S8paSjLDhjn3tLYVw8Dh+oc2C/dHEbXdcZx0z1oKqbw+/dR/Z/yC2 GMV6v5QVOfJAyzPUf2K4RUSfcZEOW1WROc7XzirxTvLo3+RES1iMTubf6i5aElBqhv TB4ZWixCu+k048afXl9yS1flp0om3PQ0dPjDuMGM= From: "amonakov at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/109780] csmith: runtime crash with -O2 -march=znver1 Date: Tue, 09 May 2023 14:49:05 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: needs-bisection, wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: amonakov at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109780 --- Comment #12 from Alexander Monakov --- Eh, that commit sneakily changed avx2 tuning without explaining that in the Changelog. Anyway, it should possible to "workaround" that by compiling with -O2 -mavx2 -mtune=3Dskylake-avx512 instead, in which case the bisect will likely point to commit=20 r12-2666-g29f0e955c97 ("x86: Update piecewise move and store") (before that, expansion of memcpy via store-by-pieces wouldn't use avx2). Also, PR 109093 looks very related.=