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[Bug middle-end/42505] [4.4/4.5/4.6 Regression] loop canonicalization causes a lot of unnecessary temporary variables
- From: "sandra at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 5 Jun 2010 20:41:58 -0000
- Subject: [Bug middle-end/42505] [4.4/4.5/4.6 Regression] loop canonicalization causes a lot of unnecessary temporary variables
- References: <bug-42505-17572@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from sandra at codesourcery dot com 2010-06-05 20:41 -------
OK, I'm testing a hack to rewrite_use_compare to make it know that it doesn't
have to introduce a temporary just to compare against constant zero. I'm also
doing a little tuning of the costs model for -Os, using CSiBE.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42505