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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
1262600f0f
dxil_nir_split_tess_ctrl sinks load_invocation_id into per-use local loads before wrapping the pre-barrier region in a loop. That sinking was skipped when the load had only one use, on the assumption that duplication wasn't needed. The skip produces wrong code when the single use is on the opposite side of the barrier from the load — e.g. HLSL-style TCS with a post- barrier `if (InvocationId == 0)` patch-constant gate. The load gets wrapped into the loop but the use stays outside, and after SSA repair the use sees the counter's post-loop value (== tcs_vertices_out), making the gate fold to false. opt_dead_cf then strips the patch- constant stores inside the gate body, producing an empty PatchConstantFunc and zero tess factors at runtime. Dropping the list_is_singular skip moves the single-use load right before its use, letting the existing pre/post-barrier handling wrap each region correctly. Multi-use loads still get one local load per use as before. Assisted-by: Claude Opus 4.7 <noreply@anthropic.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41028> |
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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.