This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug rtl-optimization/33928] [4.3/4.4/4.5 Regression] 30% performance slowdown in floating-point code caused by r118475
- From: "bonzini at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Jun 2009 06:47:54 -0000
- Subject: [Bug rtl-optimization/33928] [4.3/4.4/4.5 Regression] 30% performance slowdown in floating-point code caused by r118475
- References: <bug-33928-271@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #104 from bonzini at gnu dot org 2009-06-16 06:47 -------
I understood that with -frename-registers the regression is fixed. As I said,
without a pre-regalloc scheduling pass and without register renaming, the
scheduling quality you get is more or less random.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928