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[Bug optimization/8092] [3.3/3.4 regression] cross-jump triggers too often
- From: "rth at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 27 Dec 2003 05:02:44 -0000
- Subject: [Bug optimization/8092] [3.3/3.4 regression] cross-jump triggers too often
- References: <20020930012601.8092.bernd.paysan@gmx.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rth at redhat dot com 2003-12-27 05:02 -------
Subject: Re: [3.3/3.4 regression] cross-jump triggers too often
On Fri, Dec 26, 2003 at 09:11:55PM -0000, bernd dot paysan at gmx dot de wrote:
> A central dispatcher is *bad*, because the branch predictor can not make
> up any correlation between jump location and jump target.
No, this causes unacceptable compile-time problems. Did you not
see the bits in bb-reorder that undo this? Are they not working
for some reason?
r~
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8092