C99: Suggestions for style(9)

[Stanislav Sedov]

On Sun, 17 May 2009 14:36:03 +0200
Christoph Mallon <christoph.mallon at gmx.de> mentioned:

> 
> > Aliasing behavior is stritcly described in
> > ISO C99 standard, so there's a good point to enforcing strict-aliasing clear
> > code in our kernel.
> If you like this addition because of this reason, I have to disappoint 
> you: This addition has absolutly *nothing* to do with strict-aliasing.
>

I didn't meant I like this change only from aliasing point of view: certianly,
the code readability argument is very important. But this change also
works towards the strict aliasing problem solving too: there's just
a less chance someone will reuse a variable, address of which was
previously taken.
 
> > On the other hand the big work should be done on clearing
> > the existing code before any rule on this can be enforced.
> This addition is about improving readability for humans, because it 
> simplifies the def-use-chains, and as a side effect sometimes leads to 
> better generated code. It is not sensible to check millions of lines of 
> code whether a variables are used in different contexts within a 
> function before this can added.
> 


-- 
Stanislav Sedov
ST4096-RIPE

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