From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10876 invoked by alias); 5 Apr 2012 10:16:51 -0000 Received: (qmail 10785 invoked by uid 22791); 5 Apr 2012 10:16:49 -0000 X-SWARE-Spam-Status: No, hits=-4.2 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED,TW_ZJ X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 05 Apr 2012 10:16:36 +0000 From: "ubizjak at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/52876] [x32] - Sign extend 32 to 64bit then clear upper 32bits fails O1 or higher Date: Thu, 05 Apr 2012 10:16:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: ubizjak at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Depends on Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-04/txt/msg00343.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52876 Uros Bizjak changed: What |Removed |Added ---------------------------------------------------------------------------- Depends on| |52854 --- Comment #6 from Uros Bizjak 2012-04-05 10:16:32 UTC --- This is similar issue as PR 52854, but this time: (insn 6 3 7 2 (set (reg/f:DI 64 [ addr ]) (sign_extend:DI (subreg/u:SI (reg/v/f:DI 63 [ addr ]) 0))) pr52876.c:6 122 {*extendsidi2_rex64} (expr_list:REG_DEAD (reg/v/f:DI 63 [ addr ]) (nil))) (insn 7 6 8 2 (parallel [ (set (reg:DI 61 [ li.4 ]) (and:DI (reg/f:DI 64 [ addr ]) (const_int 4294967295 [0xffffffff]))) (clobber (reg:CC 17 flags)) ]) pr52876.c:10 377 {*anddi_1} (expr_list:REG_DEAD (reg/f:DI 64 [ addr ]) (expr_list:REG_UNUSED (reg:CC 17 flags) (nil)))) combine converts this to: Trying 6 -> 7: Successfully matched this instruction: (set (reg:DI 61 [ li.4 ]) (reg/v/f:DI 63 [ addr ])) (note 6 3 7 2 NOTE_INSN_DELETED) (insn 7 6 8 2 (set (reg:DI 61 [ li.4 ]) (reg/v/f:DI 63 [ addr ])) pr52876.c:10 62 {*movdi_internal_rex64} (expr_list:REG_DEAD (reg/v/f:DI 63 [ addr ]) (nil)))