Hi,

I'd like to know your experiences with the gcc 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 gcc compiler optimization "loop unswitching" 
(introduced in gcc 3.4) but going through a large number of different
benchmarks I could find very few cases where the optimization could be
applied. Do you share my experience?

Regards,
Tim


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