Compiler Loop Optimizations

Tim Frink <plfriko@yahoo.de>
28 Feb 2008 21:46:04 GMT

          From comp.compilers
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[3 earlier articles]
Re: Compiler loop optimizations robert.hundt@gmail.com (Robert H) (2007-01-01)
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Compiler loop optimizations Heiko.Falk@udo.edu (Heiko Falk) (2007-01-10)
Re: Compiler loop optimizations hebisch@math.uni.wroc.pl (Waldek Hebisch) (2007-01-11)
Compiler Loop Optimizations plfriko@yahoo.de (Tim Frink) (2008-02-28)
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From: Tim Frink <plfriko@yahoo.de>
Newsgroups: comp.compilers
Date: 28 Feb 2008 21:46:04 GMT
Organization: Compilers Central
Keywords: optimize, question
Posted-Date: 29 Feb 2008 01:21:03 EST

Hi,


I'd like to know your experiences with compiler loop optimizations.


What loop optimizations (in your opinion) can be applied to a large
number of programs and yield a (significant) improvement of the
program run-time?


I've tested the compiler optimization "loop unswitching" (also
introduced in gcc 3.4) but going through a large number of different
benchmarks I could find very few examples where the optimization could
be applied. Do you share my experience?


Regards,
Tim


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