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From: "duyuehai at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/50955] [4.7 Regression] IVopts incorrectly rewrite the address of a global memory access into a local form. Date: Thu, 03 Nov 2011 06:25:00 -0000 [thread overview] Message-ID: <bug-50955-4-DOPp3s8n6l@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-50955-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50955 --- Comment #6 from Yuehai Du <duyuehai at gmail dot com> 2011-11-03 06:24:58 UTC --- Let me see if i understand you correctly, you are saying that there isn't an easy way to fix it without hurting the performance(either consider less IV candidates or dumb down the alias analysis). so this issue won't be fixed in trunk now? if in that case, Avoiding the issue by set PARM isn't an option for me. i still want to fix it in our private port even with an ugly patch. can we just add a new field in MEM_REF which specify it is local or non-nolocal store(enum{INVALID, LOCAL, NON-LOCAL}), and only set it in IVOPTS before it rewrite the address. we will check this in is_hidden_global_store(). do this work in Gimple level? but i don't know if RTL optimization still delete this store because we don't keep points-to information.
next prev parent reply other threads:[~2011-11-03 6:25 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-11-02 5:12 [Bug tree-optimization/50955] New: " duyuehai at gmail dot com 2011-11-02 5:19 ` [Bug tree-optimization/50955] " duyuehai at gmail dot com 2011-11-02 9:42 ` [Bug tree-optimization/50955] [4.7 Regression] " rguenth at gcc dot gnu.org 2011-11-02 12:50 ` rguenth at gcc dot gnu.org 2011-11-02 13:10 ` rguenth at gcc dot gnu.org 2011-11-02 13:33 ` rguenth at gcc dot gnu.org 2011-11-03 6:25 ` duyuehai at gmail dot com [this message] 2011-11-03 7:52 ` rguenther at suse dot de 2011-11-03 8:07 ` rakdver at kam dot mff.cuni.cz 2011-11-03 8:19 ` rguenth at gcc dot gnu.org 2011-12-06 13:56 ` rguenth at gcc dot gnu.org 2012-01-31 10:51 ` rguenth at gcc dot gnu.org 2012-01-31 14:24 ` rguenth at gcc dot gnu.org 2012-02-06 13:43 ` rguenth at gcc dot gnu.org 2012-02-06 13:44 ` rguenth at gcc dot gnu.org 2013-08-16 4:19 ` pinskia at gcc dot gnu.org 2013-08-16 7:02 ` pinskia at gcc dot gnu.org 2013-08-28 8:33 ` rguenther at suse dot de 2013-12-18 9:42 ` rguenther at suse dot de 2013-12-18 10:24 ` amker.cheng at gmail dot com 2013-12-19 9:57 ` rguenth at gcc dot gnu.org 2015-08-28 9:16 ` amker at gcc dot gnu.org
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