[Mesa-dev] [PATCH 0/6] An attempt to speed up register set creation

Jason Ekstrand jason at jlekstrand.net
Tue Aug 18 15:43:21 PDT 2015

On Tue, Aug 18, 2015 at 3:42 PM, Eric Anholt <eric at anholt.net> wrote:
> Jason Ekstrand <jason at jlekstrand.net> writes:
>> This series was inspired by a patch from Chris Willson entitled
>> "util/register_allocate: Compute transitive conflicts using 2-passes"
>> The basic idea is the same: Instead of marking transitive conflicts as you
>> go, just mark conflicts with the base register up-front and apply
>> transitivity later.  One nice result of this is that with this and
>> pre-calculated q-values, we can get rid of the expensive conflict lists
>> that we build inside the allocator.  This takes a full piglit run on 32-bit
>> baytrail from about 28 minutes to 22 due to the reduction in screen
>> creation time.
>> The last patch makes BITSET_WORD a 64-bit value on 64-bit systems.  I don't
>> actually have perf numbers for that, but it should help ra setup as well as
>> liveness analysis and a whole host of other compiler tasks.
> Patch 1-4 are:
> Reviewed-by: Eric Anholt <eric at anholt.net>

Awesome!  Thanks!

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