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Timothy Arceri d75a36a9ee glsl: remove do_copy_propagation_elements() optimisation pass 
Since 13b859de do_copy_propagation_elements() has a flaw where
the time it takes to complete grows exponentially slowers as the number
of nested loops increases. It can also hurt rather than help verses
just letting NIR optimise the code. So if the NIR linker is enabled we
let it handle it instead.

shader-db results Iris (BDW):

total instructions in shared programs: 11177181 -> 11199739 (0.20%)
instructions in affected programs: 119424 -> 141982 (18.89%)
helped: 109
HURT: 65
total cycles in shared programs: 368946819 -> 372277173 (0.90%)
cycles in affected programs: 116539428 -> 119869782 (2.86%)

total spills in shared programs: 3983 -> 8785 (120.56%)
spills in affected programs: 2072 -> 6874 (231.76%)
helped: 0
HURT: 6

total fills in shared programs: 2016 -> 6068 (200.99%)
fills in affected programs: 230 -> 4282 (1761.74%)
helped: 0
HURT: 6

LOST:   85
GAINED: 77

freedreno results:

total instructions in shared programs: 11011122 -> 11011620 (<.01%)
instructions in affected programs: 939829 -> 940327 (0.05%)
total full in shared programs: 762725 -> 762674 (<.01%)
full in affected programs: 1096 -> 1045 (-4.65%)
total constlen in shared programs: 1772092 -> 1771596 (-0.03%)
constlen in affected programs: 2780 -> 2284 (-17.84%)
total stp in shared programs: 4040 -> 4058 (0.45%)
stp in affected programs: 3656 -> 3674 (0.49%)
total ldp in shared programs: 2160 -> 2178 (0.83%)
ldp in affected programs: 1748 -> 1766 (1.03%)
stp HURT:   shaders/robclark-shaders/gfxbench5/gl_5_high_off/13.shader_test CL: 1231 -> 1234 (0.24%)
stp HURT:   shaders/robclark-shaders/gfxbench5/gl_5_normal_off/13.shader_test CL: 1231 -> 1234 (0.24%)
stp HURT:   shaders/robclark-shaders/gfxbench5/gl_5_high_off/15.shader_test CL: 453 -> 456 (0.66%)
stp HURT:   shaders/robclark-shaders/gfxbench5/gl_5_normal_off/15.shader_test CL: 453 -> 456 (0.66%)
stp HURT:   shaders/robclark-shaders/gfxbench5/gl_5_high_off/17.shader_test CL: 144 -> 147 (2.08%)
stp HURT:   shaders/robclark-shaders/gfxbench5/gl_5_normal_off/17.shader_test CL: 144 -> 147 (2.08%)

however, those stp counts are misleading -- gfxbench gl-5-normal actually
gets its scratch (ldp/stp) stored as 16 bits instead of 32 thanks to
better NIR copy prop, and the result is 2.64398% +/- 0.0991923% perf
improvement!

i915 results:

total instructions in shared programs: 510528 -> 510489 (<.01%)
instructions in affected programs: 3303 -> 3264 (-1.18%)
total tex_indirect in shared programs: 16708 -> 16717 (0.05%)
tex_indirect in affected programs: 134 -> 143 (6.72%)
total temps in shared programs: 30181 -> 30169 (-0.04%)
temps in affected programs: 1268 -> 1256 (-0.95%)
LOST:   0
GAINED: 1

i915 highlights:
instructions HURT:   shaders/closed/steam/legend-of-grimrock/47.shader_test FS: 141 -> 144 (2.13%)
instructions HURT:   shaders/closed/steam/steamworld-dig/22.shader_test FS: 84 -> 108 (28.57%)
temps HURT:   shaders/closed/steam/left-4-dead-2/medium/3682.shader_test FS: 7 -> 13 (85.71%)

r300 results:

total instructions in shared programs: 1340439 -> 1340845 (0.03%)
instructions in affected programs: 32354 -> 32760 (1.25%)
total temps in shared programs: 179394 -> 179329 (-0.04%)
temps in affected programs: 1505 -> 1440 (-4.32%)
total consts in shared programs: 1177742 -> 1177885 (0.01%)
consts in affected programs: 1107 -> 1250 (12.92%)
total lits in shared programs: 24992 -> 25019 (0.11%)
lits in affected programs: 138 -> 165 (19.57%)
instructions HURT:   shaders/closed/steam/legend-of-grimrock/26.shader_test FS: 47 -> 52 (10.64%)
instructions HURT:   shaders/closed/steam/sanctum-2/6072.shader_test FS: 43 -> 48 (11.63%)
instructions HURT:   shaders/closed/steam/champions-of-regnum/2378.shader_test VS: 35 -> 40 (14.29%)

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13288>
2023-03-01 16:09:25 +00:00
.github/workflows add zink to macos ci 2022-11-22 19:04:13 +00:00
.gitlab/issue_templates gitlab: ask that reporters don't include long logs in descriptions 2022-06-08 15:06:51 +00:00
.gitlab-ci ci: implement unified sections 2023-03-01 12:02:24 +00:00
android AOSP: Add intel_hasvk vulkan library suffix 2022-11-29 09:05:17 +01:00
bin docs: mention meson configure and drop broken workaround script 2023-02-23 08:50:40 +00:00
build-support configure: commit test files 2017-10-16 16:32:43 -07:00
docs docs: add pipeline library support for tu 2023-02-27 17:00:12 +00:00
include amd: implement conformant TRUNC_COORD behavior for gfx11 2023-02-24 21:27:24 +00:00
src glsl: remove do_copy_propagation_elements() optimisation pass 2023-03-01 16:09:25 +00:00
subprojects meson: upgrade zlib wrap 2022-10-20 22:52:06 +00:00
.dir-locals.el dir-locals.el: Adds White Space support 2016-11-14 19:17:49 +02:00
.editorconfig glsl: Fixes ident issue in glsl_parser.yy and update editorconfig for it 2022-12-16 19:02:17 +00:00
.gitattributes Add new rules to .gitattributes 2022-01-19 15:17:17 +00:00
.gitignore .gitignore: add VSCode and VSCodium 2022-11-21 23:09:30 +00:00
.gitlab-ci.yml ci: implement unified sections 2023-03-01 12:02:24 +00:00
.graphqlrc.yml ci/bin: Add utility to find jobs dependencies 2022-08-03 23:10:37 +00:00
.mailmap mailmap: Remap name and email for Val Packett 2023-02-01 11:30:12 +00:00
CODEOWNERS hgl: remove 2023-02-18 00:44:43 +00:00
meson.build meson: allow checking for null pointers even if they're supposed to be non-null 2023-02-28 11:46:20 +00:00
meson_options.txt tu+meson: Re-work KMD selection 2023-02-25 17:02:34 +00:00
README.rst docs: promote #dri-devel on oftc over freenode 2021-05-24 09:21:48 +00:00
VERSION VERSION: bump to 23.1.0-devel for further development 2023-01-12 22:45:38 +00:00

README.rst 

`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 `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://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.