Re: [Caml-list] flow optimization q

[james woodyatt <jhw@wetware.com>]

skaller--

I tried to send this back-channel, but it bounced.

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> From: james woodyatt <jhw@wetware.com>
> Subject: Re: [Caml-list] flow optimisation q
> Date: Fri, 2 Jan 2004 12:40:28 -0800
> To: skaller@ozemail.com.au
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> On 02 Jan 2004, at 18:54, skaller wrote:
>>
>> Nothing to do with ocaml, but some people here
>> might know.. Suppose there is a set of
>> primitive procedures pr1 pr2 and a procedure constructor:
>>
>> proc = proc list
>>
>> which defines a new procedure to be a list of calls
>> to other procedures, with mutual recursion allowed.
>>
>> A special procedure is the empty
>> procedure whose call list is empty.
>>
>> Problem: remove all empty procedures
>> (and of course calls to them).
>>
>> My current algorithm is functional:
>> make a new set of procedures which
>> (a) excludes empty procedures
>> (b) has calls to empty procedures elided
>>
>> To make this solve the problem requires
>> repeated application until there are no
>> empty procedures left.
>>
>> I get the feeling there should be a way to do it
>> a bit more efficiently :-)
>
> I have a hunch that your current approach might be equivalent to
> executing an NFA, which you could improve by using a DFA instead.  Just
> a hunch, though-- I haven't given it more than cursory thought.
>
>
> -- 
> j h woodyatt <jhw@wetware.com>
> markets are only free to the people who own them.
>

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