[Gllug] code optimisations

[Nix]

On Wed, 23 Mar 2005, nix at esperi.org.uk mused:
> On Tue, 22 Mar 2005, Rich Walker stipulated:
>> But it's ... interesting ... to communicate to a C compiler that the
>> second optimisation is valid. If you did:
>> 
>>   void foo(int ** __restrict__ a) { }
> 
> As long as i and j are locals, I think that is acceptable. The compiler
> knows that a[i][j] and a[i+1000000/2][j] cannot alias :)

Except of course that they can: if i == 10000000, they would alias.
This optimization is not valid in this case. :)

-- 
This is like system("/usr/funky/bin/perl -e 'exec sleep 1'");
   --- Peter da Silva
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