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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/39326] Segmentation fault with -O1, out of memory with -O2
Date: Fri, 17 Jan 2014 13:53:00 -0000	[thread overview]
Message-ID: <bug-39326-4-33VxIw5lmk@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-39326-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39326

--- Comment #54 from Richard Biener <rguenth at gcc dot gnu.org> ---
For the original testcase on trunk we get at -O1

 tree loop invariant motion:  37.20 (16%) usr   0.02 ( 1%) sys  37.20 (16%)
wall   12127 kB ( 1%) ggc
 dead store elim1        :  17.42 ( 7%) usr   0.04 ( 2%) sys  17.44 ( 7%) wall 
 28345 kB ( 3%) ggc
 dead store elim2        :  26.22 (11%) usr   0.00 ( 0%) sys  26.20 (11%) wall 
 18664 kB ( 2%) ggc
 combiner                :  15.36 ( 6%) usr   0.04 ( 2%) sys  15.39 ( 6%) wall 
 70073 kB ( 7%) ggc
 LRA hard reg assignment :  74.07 (31%) usr   0.02 ( 1%) sys  74.05 (31%) wall 
     0 kB ( 0%) ggc
 reload CSE regs         :  12.67 ( 5%) usr   0.00 ( 0%) sys  12.66 ( 5%) wall 
 13315 kB ( 1%) ggc
 TOTAL                 : 237.86             1.83           239.60            
999181 kB

so that's still slow (memory usage is peaking at about 1.5GB now, during RA).

tree LIM:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls   s/call   s/call  name    
  4.22    120.72     9.83   299080     0.00     0.00  ref_indep_loop_p_2(loop*, 
mem_ref*, bool)
  1.89    151.82     4.41 1712943886     0.00     0.00 
mem_refs_may_alias_p(mem
_ref*, mem_ref*, pointer_map_t**) [clone .constprop.60]
  0.21    197.02     0.48    12192     0.00     0.00 
force_move_till(tree_node*, tree_node**, void*)

at -O2 this will blow up completely as it then runs into the affine-based
disambiguation.


  parent reply	other threads:[~2014-01-17 13:53 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-39326-4@http.gcc.gnu.org/bugzilla/>
2013-03-06 11:08 ` steven at gcc dot gnu.org
2013-03-06 11:38 ` rguenth at gcc dot gnu.org
2013-03-06 16:50 ` sergstesh at yahoo dot com
2013-03-06 23:39 ` steven at gcc dot gnu.org
2013-03-07  0:08 ` steven at gcc dot gnu.org
2013-03-07  0:27 ` steven at gcc dot gnu.org
2013-03-07  8:10 ` steven at gcc dot gnu.org
2013-03-07  8:45 ` rguenther at suse dot de
2013-03-07  8:48 ` rguenther at suse dot de
2013-03-07  8:53 ` rguenther at suse dot de
2013-03-07  9:58 ` steven at gcc dot gnu.org
2013-03-07 10:14 ` sergstesh at yahoo dot com
2013-03-07 10:15 ` rguenther at suse dot de
2013-03-07 17:14 ` sergstesh at yahoo dot com
2013-03-07 17:31 ` steven at gcc dot gnu.org
2013-03-07 17:34 ` steven at gcc dot gnu.org
2013-03-07 21:48 ` sergstesh at yahoo dot com
2013-03-07 22:16 ` steven at gcc dot gnu.org
2013-03-07 23:19 ` steven at gcc dot gnu.org
2013-03-08  9:14 ` rguenth at gcc dot gnu.org
2013-03-08  9:14 ` rguenth at gcc dot gnu.org
2013-03-08  9:23 ` rguenther at suse dot de
2013-03-09 14:58 ` steven at gcc dot gnu.org
2013-03-09 17:26 ` steven at gcc dot gnu.org
2013-03-11  9:40 ` steven at gcc dot gnu.org
2013-03-12 10:47 ` rguenth at gcc dot gnu.org
2013-03-12 14:05 ` rguenth at gcc dot gnu.org
2013-03-15 16:07 ` rguenth at gcc dot gnu.org
2013-03-18  8:44 ` rguenth at gcc dot gnu.org
2013-03-21 20:04 ` jakub at gcc dot gnu.org
2013-03-22 14:01 ` rguenth at gcc dot gnu.org
2013-03-26 10:10 ` rguenth at gcc dot gnu.org
2014-01-15 15:14 ` rguenth at gcc dot gnu.org
2014-01-17 13:53 ` rguenth at gcc dot gnu.org [this message]
2022-03-10 15:05 ` rguenth at gcc dot gnu.org
2024-02-20 13:14 ` rguenth at gcc dot gnu.org
2009-02-28 15:23 [Bug c/39326] New: " sergstesh at yahoo dot com
2009-03-02 17:16 ` [Bug middle-end/39326] " pinskia at gcc dot gnu dot org
2009-03-03 13:36 ` sergstesh at yahoo dot com
2009-03-03 13:49 ` rguenther at suse dot de
2009-03-03 14:15 ` sergstesh at yahoo dot com
2009-03-17 11:05 ` rguenth at gcc dot gnu dot org
2009-03-17 12:42 ` rguenth at gcc dot gnu dot org
2009-03-17 12:59 ` rguenth at gcc dot gnu dot org
2009-03-17 13:10 ` rguenth at gcc dot gnu dot org

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