What is the gcc option which reorders the variables' address?

[Leo Prete]

> What do you mean by that?
>
> Do you mean that use used -O2 and then disabled all-but-one of the
> optimizations (of those optimizations that are toggle-able through -f
> switches)?
>
> --Eljay


Actually, yes.
I wonder which is the option that reorders the addresses. I tried with
all options in pag.78 of the gcc manual, but no one is suitable for
such operation.

Is this reordering provided by a gcc command?
Leo