Re: [avr-gcc-list] What's wrong with this preprocessor statement

[Denis Chertykov]

address@hidden (J Wunsch) writes:

> Uwe Bonnes <address@hidden> wrote:
> 
> > did you compile with optimization? Then perhaps the loop was
> > optimized away.
> 
> ISTR a comment (somewhere in gcc's doc) that gcc never optimizes
> simple for() loops of the form:
> 
>      for (i = 0; i < NFOO; i++) ;
> 
> because the compiler recognizes this as a form of a delay loop.  Don't
> know whether this is also true for variations like while() loops of
> the same form.

Today it's not a true.
Now GCC can optimize out such loops.