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[Bug rtl-optimization/37948] [4.4 Regression] IRA generates slower code for -mtune=core2
- From: "bonzini at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Oct 2008 07:17:06 -0000
- Subject: [Bug rtl-optimization/37948] [4.4 Regression] IRA generates slower code for -mtune=core2
- References: <bug-37948-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from bonzini at gnu dot org 2008-10-29 07:17 -------
Subject: Re: [4.4 Regression] IRA generates slower
code for -mtune=core2
hjl dot tools at gmail dot com wrote:
> ------- Comment #1 from hjl dot tools at gmail dot com 2008-10-29 05:44 -------
> It looks like the cost of loading/storing FP values aren't appropriate for
> Core 2. With this patch:
Good. Is regmove still helping (which would be the wrong thing to do,
but gives a data point)?
Paolo
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37948