[Mesa-dev] [PATCH 0/6] An attempt to speed up register set creation
eric at anholt.net
Tue Aug 18 15:42:27 PDT 2015
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>
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