[avr-gcc-list] Re: optimizer removes volatile pin access code. why?

[David Brown]

Joerg Wunsch wrote:
> Erik Christiansen <address@hidden> wrote:
>
> > > I've tried it with -Os and foo() is still called.
>
> > Ah, yes, optimisation needs to be used for inline to work.
>
> This contradicts the documentation though:
>
> `always_inline'
>      Generally, functions are not inlined unless optimization is
>      specified.  For functions declared inline, this attribute inlines
>      the function even if no optimization level was specified.
>
> As such, it might be worth a bug report.

It might be worth filing a report for a better clarification in the 
documentation (does that need a bug report?) to make it clearer that 
"always_inline" has no effect without a normal "inline" declaration.

If Joerg Desch (or someone else) can post a relevant snippet to the list 
then I can run it through a couple of versions of avr-gcc with different 
flags, to try to help find the problem.

mvh.,

David