[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2008-01-23 Thread steven at gcc dot gnu dot org
--- Comment #48 from steven at gcc dot gnu dot org 2008-01-23 08:52 --- The priority of this bug is too high. If it wasn't just for recording that this behavior exists in VRP and CPROP, I would propose to just close this bug as WONTFIX. The test case is just too obscure, no man or

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2008-01-23 Thread rguenth at gcc dot gnu dot org
--- Comment #49 from rguenth at gcc dot gnu dot org 2008-01-23 09:06 --- I think it is reasonable to build in limits into passes that do work not linear (or at least quadratic) in the number of statements, BBs or edges. The testcase is probably just extracting the core problem from a

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2007-12-18 Thread steven at gcc dot gnu dot org
--- Comment #47 from steven at gcc dot gnu dot org 2007-12-18 13:46 --- (From update of attachment 10017) Patch is obsolete because it was commited. -- steven at gcc dot gnu dot org changed: What|Removed |Added

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2007-11-11 Thread stevenb dot gcc at gmail dot com
--- Comment #45 from stevenb dot gcc at gmail dot com 2007-11-11 09:23 --- Subject: Re: [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP Because it costs more than it brings: compile time on average goes _up_ with that patch. --

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2007-11-11 Thread rguenth at gcc dot gnu dot org
--- Comment #46 from rguenth at gcc dot gnu dot org 2007-11-11 12:16 --- Note that on the mainline equiv processing can be completely turned off by just tweaking add_equivalence () to do nothing. There are a few missed optimizations if you do that, but I belive the important kind of

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2007-11-10 Thread sebpop at gmail dot com
--- Comment #44 from sebpop at gmail dot com 2007-11-11 05:16 --- Subject: Re: [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP IMVHO this should be closed as WONTFIX. Steven, why isn't your patch from comment #37 not a candidate for fixing

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2007-11-09 Thread steven at gcc dot gnu dot org
--- Comment #43 from steven at gcc dot gnu dot org 2007-11-09 22:08 --- IMVHO this should be closed as WONTFIX. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2007-09-17 Thread rguenth at gcc dot gnu dot org
--- Comment #42 from rguenth at gcc dot gnu dot org 2007-09-17 13:11 --- Still slow. cfg cleanup : 7.10 (10%) usr 0.16 (10%) sys 7.26 (10%) wall 625 kB ( 1%) ggc tree VRP : 27.40 (39%) usr 0.39 (23%) sys 27.91 (38%) wall 7602 kB (11%) ggc

[Bug tree-optimization/19097] [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP

2007-02-14 Thread mmitchel at gcc dot gnu dot org
-- mmitchel at gcc dot gnu dot org changed: What|Removed |Added Target Milestone|4.1.2 |4.1.3 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097