From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 65656385780D; Wed, 13 Mar 2024 18:13:53 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 65656385780D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1710353633; bh=aQ04EBl030NDny/8fdMzJG+2Eu/xfm6kKgGZV/qAOWo=; h=From:To:Subject:Date:In-Reply-To:References:From; b=lUiKUtM1JjNAzepr+U9zuq8rluCmfUkNnzObd+4l7Uq9fWalyovpVQ0h/S/42bY/5 uwOXI0hf/nS6TkzsyBAQ9j7yeOaukjGoRZoFygA3gQMQOlXQq275CSO4xHbyKLSVsv WeUkaFys3otdo51PmelGLclVp4J0BCRcXxy7S6hI= From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/114310] [11/12/13/14 Regression] [aarch64] __sync_val_compare_and_swap fails on __int128_t with newval = 0 Date: Wed, 13 Mar 2024 18:13:52 +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: 8.5.0 X-Bugzilla-Keywords: ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org X-Bugzilla-Target-Milestone: 11.5 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status cc assigned_to attachments.created 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=3D114310 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED CC| |jakub at gcc dot gnu.org Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gn= u.org --- Comment #4 from Jakub Jelinek --- Created attachment 57687 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D57687&action=3Dedit gcc14-pr114310.patch Untested fix. The lack of on aarch64_reg_or_zero/rZ for the desired operand of aarch64_compare_and_swapti_lse looks correct, because the instructions expe= ct a pair of registers, so one can't use there xzr, xzr.=