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[Bug regression/33928] 33% performance slowdown from 4.2.2 to 4.3.0 in floating-point code with computed gotos
- 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: 28 Oct 2007 16:08:57 -0000
- Subject: [Bug regression/33928] 33% performance slowdown from 4.2.2 to 4.3.0 in floating-point code with computed gotos
- References: <bug-33928-271@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #8 from lucier at math dot purdue dot edu 2007-10-28 16:08 -------
Subject: Re: 33% performance slowdown from 4.2.2 to 4.3.0 in floating-point
code
On Oct 28, 2007, at 8:05 AM, rguenth at gcc dot gnu dot org wrote:
> ------- Comment #2 from rguenth at gcc dot gnu dot org 2007-10-28
> 12:05 -------
> Can you attach assembler files? What happens if you use -O2? Why
> do you need
> -fno-strict-aliasing? Does -fno-ivopts help?
I think I've answered your questions in the attachments and comments
to the PR.
Brad
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928