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09b43966ba
The next commit will cause some very specific phis to not be lowered to scalar, and that's the reason the callback is used instead of nir_lower_all_phis_to_scalar. It's worth noting that the comment in nir_lower_phis_to_scalar.c specifically calls out Deus Ex as the reason some phis should not be lowered. At least on current BRW, zero shaders from Deus Ex trace were affected for spills or fills on any Intel platform. shader-db: All Intel platforms had similar results. (Lunar Lake shown) total instructions in shared programs: 17050005 -> 17051449 (<.01%) instructions in affected programs: 41032 -> 42476 (3.52%) helped: 29 / HURT: 159 total cycles in shared programs: 876411976 -> 876433702 (<.01%) cycles in affected programs: 1455550 -> 1477276 (1.49%) helped: 40 / HURT: 150 fossil-db: All Intel platforms had similar results. (Lunar Lake shown) Totals: Instrs: 916599633 -> 916694854 (+0.01%); split: -0.00%, +0.01% CodeSize: 14705971792 -> 14708302384 (+0.02%); split: -0.00%, +0.02% Send messages: 40870114 -> 40870113 (-0.00%) Cycle count: 102360965889 -> 102364169753 (+0.00%); split: -0.00%, +0.01% Spill count: 3460669 -> 3460240 (-0.01%) Fill count: 4988325 -> 4987891 (-0.01%) Max live registers: 192914542 -> 192918153 (+0.00%); split: -0.00%, +0.00% Max dispatch width: 48848112 -> 48848128 (+0.00%) Non SSA regs after NIR: 141633613 -> 141671589 (+0.03%); split: -0.00%, +0.03% Totals from 5713 (0.28% of 2010434) affected shaders: Instrs: 5215921 -> 5311142 (+1.83%); split: -0.09%, +1.91% CodeSize: 88940784 -> 91271376 (+2.62%); split: -0.20%, +2.82% Send messages: 284751 -> 284750 (-0.00%) Cycle count: 275671864 -> 278875728 (+1.16%); split: -0.74%, +1.90% Spill count: 857 -> 428 (-50.06%) Fill count: 845 -> 411 (-51.36%) Max live registers: 667776 -> 671387 (+0.54%); split: -0.86%, +1.40% Max dispatch width: 160416 -> 160432 (+0.01%) Non SSA regs after NIR: 1127904 -> 1165880 (+3.37%); split: -0.10%, +3.47% Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Tested-by: Matt Corallo <git@bluematt.me> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41172> |
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`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://docs.mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_): .. code-block:: sh $ meson setup build $ ninja -C build/ $ sudo ninja -C build/ install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://docs.mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://docs.mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.