[Mesa-dev] [PATCH 06/10] i965: Don't dead-code eliminate instructions that write to the accumulator.

[Kenneth Graunke]

On 09/23/2013 04:13 PM, Matt Turner wrote:
> ---
> I've noticed that the vec4 backend doesn't use the ARF register file. Is this
> because we decided that it's not necessary and we can just use HW_REG?
> 
> So, this patch will probably need a fixup.

I believe so.  I think we should convert the scalar backend to use
HW_REG as well and remove the ARF file altogether.  Most ARF registers
are unique (null, acc0, cr, timestamp, ...).

We might want a FLAG file someday.