[Bug optimization/8092] [3.3/3.4 regression] cross-jump triggers too often

rth at redhat dot com gcc-bugzilla@gcc.gnu.org
Sat Dec 27 09:03:00 GMT 2003


------- 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



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