Re: [rtl-optimization] Improve Data Prefetch for IA-64

[Canqun Yang]

ÒýÑÔ Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz>:

> Hello,
>
> > On Sunday 27 March 2005 03:53, Canqun Yang wrote:
> > > The last ChangeLog of rtlopt-branch was written 
in
> > > 2003. After more than one year, many impovements 
in
> > > this branch haven't been put into the GCC HEAD. 
Why?
> >
> > Almost all of the rtlopt branch was merged.  
Prefetching is one
> > of the few things that was not, probably Zdenek 
knows why.
>
> because I never made it work as well as the current 
version,
> basically.  At least no matter how much I tried, I 
never produced
> any benchmark numbers that would justify the 
change.  Then I went
> to tree-ssa (and tried to write prefetching there, 
and got stuck on
> the same issue, after which I simply forgot due to 
loads of other work
> :-( ).
>
> Zdenek
> 

It shoud be the similar reason as comments in my 
previously supplied patch. 

http://gcc.gnu.org/ml/gcc-patches/2005-03/msg02400.html
.

Canqun Yang
Creative Compiler Research Group.
National University of Defense Technology, China.