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[Bug tree-optimization/16158] [3.5 Regression] O(N^2) in tree-ssa-pre.c
- From: "dberlin at dberlin dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Jul 2004 17:56:36 -0000
- Subject: [Bug tree-optimization/16158] [3.5 Regression] O(N^2) in tree-ssa-pre.c
- References: <20040623135616.16158.belyshev@lubercy.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From dberlin at dberlin dot org 2004-07-13 17:56 -------
Subject: Re: [3.5 Regression] O(N^2) in tree-ssa-pre.c
>>
>> This is *not* a 3.5 regression, because tree-ssa-pre.c didn't exist
>> before 3.5
>> :)
>
> But the compile time is a regression though so that makes it a
> regression.
>
> :)
>
There is no compile time regression for this case anymore.
PRE takes no timeable amount of time anymore (with checking off. With
checking on, it's 0% or 1%, at 0.1 seconds)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16158