"Probabilistic" optimizations

gateley@m2.ti.com (John Gateley)
27 Feb 90 16:11:02 GMT

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"Probabilistic" optimizations gateley@m2.ti.com (1990-02-27)
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From: gateley@m2.ti.com (John Gateley)
Newsgroups: comp.compilers
Date: 27 Feb 90 16:11:02 GMT
Organization: TI Computer Science Center, Dallas

I am looking for references on compiler optimizations based on
the frequency of IF/CASE branches. Please email and I will post a summary.


Thanks,


John
gateley@m2.csc.ti.com
[The original Fortran compiler had a FREQUENCY statement that let you
tell it the relative likelihood that each of the three branches of an IF
would be taken or the typical number of times that a DO loop would run. It
turned out to be so useless that it disappeared by the time they came up
with Fortran II. I haven't looked for more recent references, -John]




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