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[Bug target/19133] march=athlon can produce slower code than march=i686
- 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: 8 Feb 2005 10:09:25 -0000
- Subject: [Bug target/19133] march=athlon can produce slower code than march=i686
- References: <20041222210135.19133.ornati@fastwebnet.it>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From steven at gcc dot gnu dot org 2005-02-08 10:09 -------
-march=athlon should optimize for the K7 yes. What you probably run into
is a simple backend problem where the code generated for the K7 can, for
whatever reason, not be optimized as well as the i686 code.
Can you try mainline and see what happens there? I think very few people
think this is important enough to fix for already-released compilers. But
if the problem exists on mainline as well, we can look into it.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-02-08 10:09:23
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19133