From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1004238582B0; Tue, 18 Jul 2023 12:03:23 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1004238582B0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1689681803; bh=3qPUx0WMcvRtPAyw7Zv1IhNrlvRRChStC7dd16+d3K0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=Tck1NEkaoYLrL1E90pGk9ursZusic+ZZfJeBrpb14zod9R6H3TrHHCeKRaC2mThdV dxgY+amdAMEAP5dflQBSi54DhbATSuFu66Ou866ioVorVgvahM4o5nCpMXtNNkSUof sxRRLEIztZZ+f22l5SBy+sBQhfFoEnFd4zsXTu3I= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/110711] possible missed optimization for std::max with -march=znver2 Date: Tue, 18 Jul 2023 12:03:22 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 13.1.0 X-Bugzilla-Keywords: missed-optimization, openmp X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED 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: keywords 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=3D110711 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization, openmp --- Comment #3 from Richard Biener --- Both are vectorized but somehow the OMP simd setup discards the vectorized variant of k_std_max. The .GOMP_SIMD_VF (simduid.3_12(D)) seems to be statically zero?!=