Jason Ekstrand
f064b7a42c
Basically every pass in NIR uses nir_ssa_def_rewrite_uses which calls nir_instr_rewrite_src which is fairly complex because it handles all sorts of non-SSA cases. Since we already know a priori that every source written by nir_ssa_def_rewrite_uses is SSA, we can check new_src once at the top of the function and cut out all that complexity. While we're at it, we expose a new SSA-only nir_ssa_def_rewrite_uses_ssa helper which takes an SSA def which avoids the one SSA check. It's also more convenient 90% of the time. Compile time as tested by Rhys Perry <pendingchaos02@gmail.com> Difference at 95.0% confidence -797.166 +/- 418.649 -0.566174% +/- 0.296441% (Student's t, pooled s = 325.459) Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Reviewed-by: Rhys Perry <pendingchaos02@gmail.com> Reviewed-by: Connor Abbott <cwabbott0@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8790>
`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://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `Freenode's #dri-devel <irc://chat.freenode.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://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.