--- Comment #6 from rguenth at gcc dot gnu dot org 2009-05-08 12:28 ---
Subject: Bug 40062
Author: rguenth
Date: Fri May 8 12:28:01 2009
New Revision: 147284
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=147284
Log:
2009-05-08 Richard Guenther
PR tree-optimization/
--- Comment #5 from rguenth at gcc dot gnu dot org 2009-05-08 12:24 ---
Subject: Bug 40062
Author: rguenth
Date: Fri May 8 12:24:22 2009
New Revision: 147283
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=147283
Log:
2009-05-08 Richard Guenther
PR tree-optimization/
--- Comment #4 from sebpop at gmail dot com 2009-05-08 12:12 ---
Subject: Re: [4.3/4.4/4.5 Regression] high
memory usage and compile time in SCEV cprop with -O3
> + Â Â Â /* Increase the limit by the PHI argument number to avoid
> exponential
> + Â Â Â Â time and memory
> + /* Increase the limit by the PHI argument number to avoid exponential
> + time and memory complexity. */
This looks good.
Thanks,
Sebastian
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org
--- Comment #3 from rguenth at gcc dot gnu dot org 2009-05-08 09:52 ---
Or rather
Index: tree-scalar-evolution.c
===
--- tree-scalar-evolution.c (revision 147237)
+++ tree-scalar-evolution.c (working copy)
@@ -1320,
--- Comment #2 from rguenth at gcc dot gnu dot org 2009-05-08 09:47 ---
The issue is that with follow_ssa_edge_in_condition_phi we end up with
exponential time and space complexity because we have several PHI nodes
in our chain that have a large number of PHI arguments.
The following fi
--- Comment #1 from rguenth at gcc dot gnu dot org 2009-05-07 16:08 ---
Created an attachment (id=17823)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17823&action=view)
unincluded testcase
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40062
