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Postings from March 2000
Paul Moore <Paul.Moore@uk.origin-it.com> writes:
>From: M.J.T. Guy [mailto:mjtg@cus.cam.ac.uk]
>>
>> Good point. I was proposing to look for both "PL_na" and "na" etc.
>> If a PL... symbol was found, we can assume the module has been updated
>> so no POLLUTE is needed. I'd only force POLLUTE if there were
>> polluting symbols present and *no* PL... ones.
>
>But... In the case of na, a good fix for (silly example)
>
> { na = 12; }
>
>is
>
> { STRLEN na; na = 12; }
>
>instead of
>
> { PL_na = 12; }
>
>because access to a local variable is faster than access to a global.
>
>So a fixed module may still refer to na rather than PL_na.
Indeed for na that is what Tk does (mostly - in one or two places
I changed the name as well).
>(I assume you
>don't propose to scan for declarations...?)
>
>I'm not sure of the value of the heuristic approach in any case, but I
>thought I'd add this datapoint...
>
>Paul.
--
Nick Ing-Simmons <nik@tiuk.ti.com>
Via, but not speaking for: Texas Instruments Ltd.