[LLVMdev] [LLVMDev] [Question] How do I get the number of machine registers.

[Jeff Kunkel]

I am just going with a cache strategy where I just eager evaluate the
get alias function.

- Jeff

On Wed, Sep 29, 2010 at 12:17 PM, Jakob Stoklund Olesen <stoklund at 2pi.dk> wrote:
>
> On Sep 29, 2010, at 8:11 AM, Jeff Kunkel wrote:
>
>> Jacob, have you completed the topological sorting or the registers? It
>> seems I iterate through sub/alias-registers quite often, and I think a
>> performance gain might occur if the sub-registers were grouped better.
>
> I abandoned the experiment because it didn't give a significant performance gain.
>
> Another problem is that aliases don't always form a nice tree, so sometimes topological sorting is not possible.
>
> The fast register allocator now avoids iterating over aliases by using a working-set strategy instead.
>
> /jakob
>
>