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From: "bmei at broadcom dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/59651] [4.9 Regression] Vectorizer failing to spot dependence causes incorrect code generation. Date: Thu, 02 Jan 2014 11:04:00 -0000 [thread overview] Message-ID: <bug-59651-4-wNp4qKlVy9@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-59651-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59651 --- Comment #5 from Bingfeng Mei <bmei at broadcom dot com> --- Created attachment 31559 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31559&action=edit initial patch Hi, Tejas, vect_create_cond_for_alias_checks contains a bug in handling negative step. The computed data access range should be shifted by TYPE_SIZE_UNIT of bytes. Could you test the attached patch on aarch64 (I don't have simulation environment setup)? Meanwhile I will check whether there is any regression on x86-64. If everything is right, I am going to submit the patch. Thanks.
next prev parent reply other threads:[~2014-01-02 11:04 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-12-31 16:28 [Bug tree-optimization/59651] New: " belagod at gcc dot gnu.org 2013-12-31 16:53 ` [Bug tree-optimization/59651] " bmei at broadcom dot com 2013-12-31 17:12 ` belagod at gcc dot gnu.org 2013-12-31 21:07 ` [Bug tree-optimization/59651] [4.9 Regression] " pinskia at gcc dot gnu.org 2013-12-31 22:42 ` bmei at broadcom dot com 2014-01-01 18:31 ` belagod at gcc dot gnu.org 2014-01-02 11:04 ` bmei at broadcom dot com [this message] 2014-01-02 11:37 ` belagod at gcc dot gnu.org 2014-01-03 10:53 ` belagod at gcc dot gnu.org 2014-01-03 15:41 ` meibf at gcc dot gnu.org 2014-01-04 12:04 ` jakub at gcc dot gnu.org 2014-01-21 14:16 ` mshawcroft at gcc dot gnu.org
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