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gallium: add PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT

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This avoids a serious r600g bug leading to a GPU hang.
The chances this bug will get fixed are pretty low now.

I deeply regret listening to others and not pushing this patch, leaving
other users with a GPU-crashing driver. Yes, it should be fixed
in the compiler and it's ugly, but users couldn't care less about that.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86720

Cc: 11.0 10.6 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák
2015-10-20 18:26:02 +02:00
parent 921feb8782
commit 814f31457e
16 changed files with 45 additions and 1 deletions
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4
src/gallium/docs/source/screen.rst
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@@ -367,6 +367,10 @@ to be 0.
are supported.
* ``PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE``: Whether the driver doesn't
ignore tgsi_declaration_range::Last for shader inputs and outputs.
* ``PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT``: This is the maximum number
of iterations that loops are allowed to have to be unrolled. It is only
a hint to state trackers. Whether any loops will be unrolled is not
guaranteed.
.. _pipe_compute_cap: