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[Bug rtl-optimization/21485] BYTEmark numsort: performance regression 3.4.3 -> 4.0.0 with -O3 optimization
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 May 2005 09:27:13 -0000
- Subject: [Bug rtl-optimization/21485] BYTEmark numsort: performance regression 3.4.3 -> 4.0.0 with -O3 optimization
- References: <20050510090336.21485.jbucata@tulsaconnect.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rguenth at gcc dot gnu dot org 2005-05-10 09:27 -------
mainline drops even lower - looks like poor choice of addressing modes and thus
more register pressure for 4.0 and 4.1. Note that using profile-feedback
improves numbers a lot (but still we regress).
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21485