0781edc30f
The pass previously supported removing complete no-op writes, but we can do better by noticing if any channel being written is the current channel's value and masking off those writes. I noticed this happening in Stray's fragment shader, where it looked like some translation layer had turned var[x].zw = vec2(a, b) into var[x] = vec4(var[x].x, var[x].y, a, b). This in turn lets nir_shrink_vec_array_vars be more effective. Totals: MaxWaves: 22158876 -> 22156696 (-0.01%); split: +0.00%, -0.01% Instrs: 401167243 -> 401007996 (-0.04%); split: -0.04%, +0.00% CodeSize: 1004397302 -> 1004133728 (-0.03%); split: -0.03%, +0.00% STPs: 369810 -> 234618 (-36.56%) LDPs: 209430 -> 172011 (-17.87%) Totals from 1884 (0.12% of 1560230) affected shaders: MaxWaves: 12686 -> 10506 (-17.18%); split: +6.97%, -24.15% Instrs: 2099486 -> 1940239 (-7.59%); split: -7.64%, +0.06% CodeSize: 4570472 -> 4306898 (-5.77%); split: -5.81%, +0.05% NOPs: 334399 -> 270881 (-18.99%); split: -20.58%, +1.58% MOVs: 131003 -> 148034 (+13.00%); split: -11.59%, +24.59% COVs: 14512 -> 16921 (+16.60%); split: -0.23%, +16.83% Full: 58120 -> 72399 (+24.57%); split: -6.75%, +31.31% (ss): 79215 -> 45331 (-42.77%); split: -48.46%, +5.68% (sy): 33081 -> 11119 (-66.39%); split: -66.56%, +0.18% (ss)-stall: 302152 -> 115528 (-61.76%); split: -64.34%, +2.57% (sy)-stall: 2706110 -> 498998 (-81.56%); split: -81.68%, +0.12% STPs: 212045 -> 76853 (-63.76%) LDPs: 47337 -> 9918 (-79.05%) Preamble Instrs: 413954 -> 413630 (-0.08%); split: -0.21%, +0.13% Cat0: 370362 -> 306844 (-17.15%); split: -18.58%, +1.43% Cat1: 145629 -> 165003 (+13.30%); split: -10.51%, +23.81% Cat2: 687947 -> 683992 (-0.57%); split: -0.61%, +0.04% Cat3: 362919 -> 360690 (-0.61%); split: -0.72%, +0.11% Cat6: 461411 -> 352375 (-23.63%) Cat7: 16857 -> 16974 (+0.69%); split: -0.35%, +1.04% Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37313>
`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.