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[Bug rtl-optimization/19078] [4.0 Regression] Poor quality code after loop unrolling.
- From: "rakdver at atrey dot karlin dot mff dot cuni dot cz" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Feb 2005 11:12:13 -0000
- Subject: [Bug rtl-optimization/19078] [4.0 Regression] Poor quality code after loop unrolling.
- References: <20041219105831.19078.chris@bubblescope.net>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2005-02-10 11:12 -------
Subject: Re: [4.0 Regression] Poor quality code after loop unrolling.
> In comment #3 Zdenek said "Possibly even better would be to add generation of
> autoincrements to loop optimizer, but this would require fixing cse so that it
> handles them correctly." Zdenek, can you elaborate on why CSE needs fixing?
cse does not handle autoincrements. I have no idea what's the problem
there, it is just what I was told when I asked for the possibility to
move the autoinc creation pass last time. Anyone has more precise
information about the nature of the problem?
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19078