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[Bug regression/33928] [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in floating-point code
- From: "lucier at math dot purdue dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Nov 2007 14:47:24 -0000
- Subject: [Bug regression/33928] [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in floating-point code
- References: <bug-33928-271@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #17 from lucier at math dot purdue dot edu 2007-11-30 14:47 -------
Subject: Re: [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in
floating-point code
On Nov 30, 2007, at 12:39 AM, bonzini at gnu dot org wrote:
> One suspect is fwprop. Anyone can confirm?
How does one turn off fwprop? It doesn't seem to like "-fno-fwprop".
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928