Re: [avr-gcc-list] register allocation - something not right

[E. Weddington]

address@hidden wrote:

> I have been looking at the gcc avr register allocation and something are not 
> quite right.
>
> I would welcome feedback on this as I work towards a solution.
>
> It is very common to see sub-optimal allocations that results in redundant 
> moves. Somelike
>
> reg x = reg y
> reg z = nnn
> reg y = reg x
>
> often between function calls.
>
> The new-ra options fixes many of these issues and I was hoping this 
> experimental allocator would eventually find its way in to mainstream gcc - 
> that appears unlikely.
That is correct: it is unlikely that new-ra will be fixed in GCC. There 
are a number of bugs concerning new-ra and they are currently all 
suspended because they are currently discussing about ripping out new-ra 
altogether. So, your experiments with new-ra is moot, unless you take it 
up with the GCC folks over on their mailing lists. Sorry.

Eric