Code optimization only in loops

[Paolo Bonzini]

> It seems that when set in a loop, the program is able to perform some
> type of optimization to actually get the use of the offsets where as
> in the case of no loop, we have twice the calculations of instructions
> for each address calculations.

I suggest you look at the dumps for i386 to see which pass does the
changes, and then see what happens in your port.

Paolo