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[Bug rtl-optimization/20376] The missed-optimization of general induction variables in the new rtl-level loop optimizer cause performance degradation.
- From: "canqun at nudt dot edu dot cn" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 14 Jul 2005 15:25:06 -0000
- Subject: [Bug rtl-optimization/20376] The missed-optimization of general induction variables in the new rtl-level loop optimizer cause performance degradation.
- References: <20050308024912.20376.canqun@nudt.edu.cn>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From canqun at nudt dot edu dot cn 2005-07-14 15:25 -------
(In reply to comment #13)
> Fixed.
Performance test on IA-64 recently show that loop unrolling with '-fweb' and '-
frename-registers" turned on can take nearly the same effectiveness as with
the giv splitting.
Very thanks to Steven Bosscher, Zdenek Dvorak, Andrew Pinski, and all other
GCC developers.
Canqun Yang
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20376