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https://gitlab.freedesktop.org/mesa/mesa.git
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read-only mirror of https://gitlab.freedesktop.org/mesa/mesa
3458eae4bc
to strengthen it and fix a rare case of incorrect behavior.
This is the incorrect behavior that's fixed:
if (invocation_id == 0)
patch_output[0] = invocation_id;
else if (invocation_id == 1)
patch_output[1] = invocation_id;
else
patch_output[2] = invocation_id;
The stored SSA defs are the same, but each invocation writes a different
value to different outputs, so they are not duplicated, but the code
incorrectly treated them as duplicated and removed [1] and [2].
The requirement for correctness is that if an output is duplicated,
it must have stores in the same blocks as the output it duplicates.
To fix the incorrect behavior, awareness of blocks is added to the algorithm,
which leads to the following new cases that are optimized:
1. Different blocks store different SSA defs, but equal in each block:
if (..) {
output[0] = a;
output[1] = a; // eliminated
} else {
output[0] = b;
output[1] = b; // eliminated
}
2. Different GS emit sections store different SSA defs, but equal in each
section:
output[0] = a;
output[1] = a; // eliminated
emit_vertex;
output[0] = b;
output[1] = b; // eliminated
emit_vertex;
3. A weird case that could be duplicated but is left alone due to
the counterexample above:
if (..)
output[0] = a;
else
output[1] = a;
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| .gitlab | ||
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| .marge/hooks | ||
| android | ||
| bin | ||
| build-support | ||
| docs | ||
| include | ||
| licenses | ||
| src | ||
| subprojects | ||
| .clang-format | ||
| .clang-format-ignore | ||
| .clang-format-include | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .graphqlrc.yml | ||
| .mailmap | ||
| .mr-label-maker.yml | ||
| .shellcheckrc | ||
| clippy.toml | ||
| CODEOWNERS | ||
| meson.build | ||
| meson.options | ||
| README.rst | ||
| rustfmt.toml | ||
| VERSION | ||
`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.