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[Bug rtl-optimization/8126] [3.3/3.4/4.0 regression] Floating point computation far slower in 3.2 than in 2.95
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Jan 2005 13:52:17 -0000
- Subject: [Bug rtl-optimization/8126] [3.3/3.4/4.0 regression] Floating point computation far slower in 3.2 than in 2.95
- References: <20021002075601.8126.o.lauffenburger@topsolid.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From steven at gcc dot gnu dot org 2005-01-16 13:52 -------
I think this is a WONTFIX regression.
As Honza pointed out, interactions between regstack and sched2 can sometimes
produce really odd results. I don't see us produce a "sched3"-like pass for
x87 any time soon. It should not be hard to teach regstack to use the DFA
interface, but realistically I don't think anyone is interested in doing so,
except for Roger Sayle maybe...?
IMHO this is a BS bug, because overall we are not worse for FP at all, and
compared to 2.95.x we are in fact *much* better overall.
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What |Removed |Added
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CC| |sayle at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8126