GCC 4.2.0 Status Report (2007-02-19)

Paolo Bonzini paolo.bonzini@lu.unisi.ch
Tue Feb 20 17:16:00 GMT 2007

> In term of ports, yes I am agree.  As the preformance even with last 
> Paolo's patches (some changes could be applied to the mainline too, so 
> it is not only about df), the branch compiler is still 8.7% slower for 
> SPECint2000 compilation on 2.66Ghz Core2 with --enable-check=release.

Just to straighten things, only one patch (the one approved by Roger for 
mainline) has been applied to dataflow branch.

Of the four patches I posted, the CSE patch could also go into mainline.

The combine patches (not yet applied to dataflow-branch even) give ~1% 
in addition to that and Kenny has a patch to provide LUIDs for free to 
all passes; that will probably give another 0.5-1%.

That said, I think it would not be bad to put 4.3 in stage3 mode until 
dataflow branch is ready and, at that point, rebranch 4.2 and soon after 
that merge dataflow branch.


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