On 26/05/17 20:16, Thomas Helland wrote:
2017-05-26 8:13 GMT+02:00 Dave Airlie <airl...@gmail.com>:
Hi Elie,
Thanks for the fp64 work.
I've pulled the latest branch from your repo and start running piglit
on a BARTS (r600g) GPU.
I've noticed a few asserts with a debug build in ir_validate, do you
test with --enable-debug?
I also notice some really large times in the GLSL->TGSI pass copy
propogation on mul/div tests with matrices, tests take a fair while to
complete.
Unrelated to this I have noticed on some profiles when using nvc0
that the GLSL->TGSI passes are quite painful on compile times.
Especially copy propagation shows up as a big one.
Not sure if there is some easy gains to be had here as I haven't
looked at the pass at all.
Yeah it sucks. Copy prop is cleaning up the things that were lazily
created by the glsl -> tgsi pass, and then dead_code is slow because its
cleaning up after cop prop.
I made an attempt to speed it up but it seems the best way to fix it
would be to avoid generating all the temps in the first place. There are
code comments (TODOS?) about fixing this, but it seems those were copied
from the mesa ir code years ago. It wasn't clear to me from my quick
look how hard it would be to improve the glsl -> tgsi pass.
Just wondering if you've seen anything like this?
Dave.
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