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Try to move iterator as close to the end of the block as possible. The goal is to avoid the iterator being used after being updated, to prevent the need for an extra move instruction. shader-db report on `Mali-G725`: ``` total instrs in shared programs: 720530 -> 716482 (-0.56%) instrs in affected programs: 231842 -> 227794 (-1.75%) helped: 3804 HURT: 1 helped stats (abs) min: 1.0 max: 8.0 x̄: 1.06 x̃: 1 helped stats (rel) min: 0.14% max: 6.25% x̄: 2.75% x̃: 2.86% HURT stats (abs) min: 1.0 max: 1.0 x̄: 1.00 x̃: 1 HURT stats (rel) min: 0.05% max: 0.05% x̄: 0.05% x̃: 0.05% 95% mean confidence interval for instrs value: -1.08 -1.04 95% mean confidence interval for instrs %-change: -2.79% -2.71% Instrs are helped. total cycles in shared programs: 35295.80 -> 35295.55 (<.01%) cycles in affected programs: 3.50 -> 3.25 (-7.14%) helped: 8 HURT: 0 helped stats (abs) min: 0.03125 max: 0.03125 x̄: 0.03 x̃: 0 helped stats (rel) min: 6.90% max: 7.41% x̄: 7.15% x̃: 7.15% 95% mean confidence interval for cycles value: -0.03 -0.03 95% mean confidence interval for cycles %-change: -7.38% -6.92% Cycles are helped. total fma in shared programs: 5054.34 -> 5054.34 (0.00%) fma in affected programs: 0 -> 0 helped: 0 HURT: 0 total cvt in shared programs: 4707.69 -> 4644.44 (-1.34%) cvt in affected programs: 1471.28 -> 1408.03 (-4.30%) helped: 3804 HURT: 1 helped stats (abs) min: 0.015625 max: 0.125 x̄: 0.02 x̃: 0 helped stats (rel) min: 0.37% max: 12.50% x̄: 6.01% x̃: 6.67% HURT stats (abs) min: 0.015625 max: 0.015625 x̄: 0.02 x̃: 0 HURT stats (rel) min: 0.13% max: 0.13% x̄: 0.13% x̃: 0.13% 95% mean confidence interval for cvt value: -0.02 -0.02 95% mean confidence interval for cvt %-change: -6.07% -5.94% Cvt are helped. total sfu in shared programs: 1878.25 -> 1878.25 (0.00%) sfu in affected programs: 0 -> 0 helped: 0 HURT: 0 total v in shared programs: 2353 -> 2353 (0.00%) v in affected programs: 0 -> 0 helped: 0 HURT: 0 total t in shared programs: 5530 -> 5530 (0.00%) t in affected programs: 0 -> 0 helped: 0 HURT: 0 total ls in shared programs: 27975 -> 27975 (0.00%) ls in affected programs: 0 -> 0 helped: 0 HURT: 0 total code size in shared programs: 6386560 -> 6289664 (-1.52%) code size in affected programs: 508544 -> 411648 (-19.05%) helped: 757 HURT: 0 helped stats (abs) min: 128.0 max: 128.0 x̄: 128.00 x̃: 128 helped stats (rel) min: 0.83% max: 33.33% x̄: 31.09% x̃: 33.33% 95% mean confidence interval for code size value: -128.00 -128.00 95% mean confidence interval for code size %-change: -31.57% -30.60% Code size are helped. total threads in shared programs: 14698 -> 14698 (0.00%) threads in affected programs: 0 -> 0 helped: 0 HURT: 0 total loops in shared programs: 166 -> 166 (0.00%) loops in affected programs: 0 -> 0 helped: 0 HURT: 0 total spills in shared programs: 37 -> 37 (0.00%) spills in affected programs: 0 -> 0 helped: 0 HURT: 0 total fills in shared programs: 111 -> 111 (0.00%) fills in affected programs: 0 -> 0 helped: 0 HURT: 0 ``` Reviewed-by: Mary Guillemard <mary.guillemard@collabora.com> Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36021> |
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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.