[PD-dev] FYI: gcc 4.1 in auto-build

[Tim Blechmann]

On Sun, 2006-08-13 at 21:29 -0400, Hans-Christoph Steiner wrote:
> 
> Just an FYI: I set up the Debian/etch (testing) box to use gcc 4.1.   
> Both pd-MAIN and Pd-extended are compiling fine with gcc 4.1.  It  
> would be nice to try some of the auto-vectorization features.  Has  
> anyone messed with them at all?

the biggest problem, the compiler faces, is not only the loop itself,
but memory alignment and aliasing ... if the compiler doesn't allocate
the memory itself, it's unlikely that it generates decent vectorized
code ...
so, i suppose, the performance gain of auto-vectorization for pd is more
or less placebo
but iirc, there is an -ftree-vectorizer-verbose option for gcc to get
some information from the vectorizer ...

cheers ... tim

--
tim at klingt.org    ICQ: 96771783
http://www.mokabar.tk

Which is more musical, a truck passing by a factory or a truck passing
by a music school?
  John Cage
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