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2bdffe7eb2
When there are multiple MOVs with the same destination in loop
in different branches and some readers after the loop, we would
now errorneously copy propagate the last MOV, like in the following
snippet:
BGNLOOP;
...
IF temp[3].x___;
MOV temp[2], const[1].yxxy;
BRK;
ENDIF;
IF temp[4].x___;
MOV temp[2], const[1].xyxy;
BRK;
ENDIF;
...
MOV temp[2], const[1].xyxy;
ENDLOOP;
ADD_SAT temp[0], temp[2], temp[1];
into:
BGNLOOP;
...
IF temp[3].x___;
MOV temp[2], const[1].yxxy;
BRK;
ENDIF;
IF temp[3].y___;
MOV temp[2], const[1].xyxy;
BRK;
ENDIF;
...
ENDLOOP;
ADD_SAT temp[0], const[1].xyxy, temp[1];
We need the copy propagate just for simple cleanups after ttn,
anything more complex should have been handled already in NIR.
So just bail out if any of the readers is after the loop.
No changes in shader-db.
Fixes few piglit tests when loop unrolling is disabled:
spec@glsl-1.10@execution@vs-loop-complex-unroll
spec@glsl-1.10@execution@vs-loop-complex-unroll-nested-break
spec@glsl-1.10@execution@vs-loop-complex-unroll-with-else-break
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/6467
Signed-off-by: Pavel Ondračka <pavel.ondracka@gmail.com>
Reviewed-by: Filip Gawin <filip@gawin.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16657>
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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://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.