optimization hints?

Joe Buck jbuck@Synopsys.COM
Wed Jun 30 15:43:00 GMT 1999


Robert Lipe writes:

> It sounds like you're asking about runtime directed feedback
> optimizations.
> 
> They can make a huge win on code by reducing paging, reducing cache
> footprint, improving burst read/pipelining, improving branch prediction,
> and so on.  It's really quite amazing to watch such an optimizer run
> around your basic blocks, flipping the polarity of tests, gluing "hot
> spots" together, and so on.
> 
> In SCO parlance, one such utility is 'fur', the FUnction Rearranger.

There is a project called GNU Rope, or "grope", for this purpose, by
Nat Friedman.  I have no idea about how good it is.

The web site for it seems to be down; all I can find on it is this
article:
http://lwn.net/1998/1029/als/rope.html



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