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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/58246] [4.7/4.8/4.9 Regression] wrong code at -O1 and above Date: Tue, 27 Aug 2013 07:23:00 -0000 [thread overview] Message-ID: <bug-58246-4-EPxvuILj2S@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-58246-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58246 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2013-08-27 Ever confirmed|0 |1 --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- We have: # .MEM_13 = VDEF <.MEM_11> tD.1723[1] = 0; # .MEM_15 = VDEF <.MEM_13> tD.1723[a.0_6] = 0; at mergephi1 and cddce1 decides to delete the first of the two stores as needed for some weird reason: processing: _8 = t[a.0_6]; marking necessary through .MEM_4 stmt t[1] = 1; marking necessary through .MEM_3 stmt t[0] = 1; marking necessary through .MEM_15 stmt t[a.0_6] = 0; processing: t[a.0_6] = 0; processing: t[0] = 1; processing: t[1] = 1; processing: a = 0; Eliminating unnecessary statements: Deleting : t[1] = 0; Removed 1 of 18 statements (5%)
next prev parent reply other threads:[~2013-08-27 7:23 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-08-27 4:36 [Bug tree-optimization/58246] New: wrong code at -O1 and above (affecting 4.6, 4.7, 4.8, and trunk) su at cs dot ucdavis.edu 2013-08-27 7:15 ` [Bug tree-optimization/58246] [4.7/4.8/4.9 Regression] wrong code at -O1 and above jakub at gcc dot gnu.org 2013-08-27 7:23 ` jakub at gcc dot gnu.org [this message] 2013-08-29 10:41 ` rguenth at gcc dot gnu.org 2013-08-29 10:58 ` rguenth at gcc dot gnu.org 2013-08-29 13:04 ` rguenth at gcc dot gnu.org 2013-08-30 7:54 ` [Bug tree-optimization/58246] [4.7/4.8 " rguenth at gcc dot gnu.org 2013-09-03 12:18 ` rguenth at gcc dot gnu.org 2014-05-07 7:59 ` [Bug tree-optimization/58246] [4.7 " rguenth at gcc dot gnu.org 2014-05-07 8:00 ` rguenth at gcc dot gnu.org
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