Re: Estimating loop iterations

Trevor.Jenkins@suneidesis.com (Trevor Jenkins)
8 May 2005 17:00:57 -0400

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Re: Estimating loop iterations gah@ugcs.caltech.edu (glen herrmannsfeldt) (2005-05-08)
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From: Trevor.Jenkins@suneidesis.com (Trevor Jenkins)
Newsgroups: comp.compilers,comp.lang.fortran
Date: 8 May 2005 17:00:57 -0400
Organization: suneidesis
References: 05-05-030 05-05-032
Keywords: optimize, Fortran, history, comment
Posted-Date: 08 May 2005 17:00:57 EDT

On 7 May 2005 16:58:29 -0400, John Levine commented:


> [I heard that FREQUENCY went away both because nobody used it and because
> at least with 1960 optimizing technology, it didn't tell the compiler anything
> useful. -John]


I heard that the reason it was taken away after the first few FORTRAN
compilers implemented it round the wrong way ... but it didn't affect the
quality of the code produced. Also programmers were found to be poor at
determining which execution paths are actually followed,


Regards, Trevor


<>< Re: deemed!
[Yes, that agrees with what I've heard. -John]

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