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[Bug rtl-optimization/17088] poor fortran optimisation at -O2/3
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Jan 2005 21:39:02 -0000
- Subject: [Bug rtl-optimization/17088] poor fortran optimisation at -O2/3
- References: <20040818204713.17088.jv244@cam.ac.uk>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-06 21:39 -------
Looks like to me the register allocator is f'ing up as on PPC (where there more fp registers) -O2 is faster
(by a factor of 2) than -O1. It is also one of the reasons why new-ra could be fucking up too.
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What |Removed |Added
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GCC target triplet| |i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17088