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<body><span class="vcard"><a class="email" href="mailto:jason@jlekstrand.net" title="Jason Ekstrand <jason@jlekstrand.net>"> <span class="fn">Jason Ekstrand</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - [REGRESSION] [BISECTED] [DXVK] 1-bit booleans and Elite Dangerous shader mis-optimization"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111141">bug 111141</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Component</td>
<td>Mesa core
</td>
<td>Drivers/Vulkan/radeon
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [REGRESSION] [BISECTED] [DXVK] 1-bit booleans and Elite Dangerous shader mis-optimization"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111141#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [REGRESSION] [BISECTED] [DXVK] 1-bit booleans and Elite Dangerous shader mis-optimization"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111141">bug 111141</a>
from <span class="vcard"><a class="email" href="mailto:jason@jlekstrand.net" title="Jason Ekstrand <jason@jlekstrand.net>"> <span class="fn">Jason Ekstrand</span></a>
</span></b>
<pre>The undefined values appear harmless so I'm going to guess that this is
probably actually a RADV bug. Not knowing too much about RADV, how I'd go
aboug debugging it next would be to try "bisecting" nir_opt_algebraic.py by
commenting out large chunks of it and seeing if you can narrow down which
optimization triggers the problem. Fortunately, with a renderdoc trace, it's
pretty quick to test out changes (before/after shouldn't matter for the
renderdoc capture in this case) so it shouldn't take a terribly long time.
Once you've figured out which optimization is the culpret, we can see if that
optimization is buggy for some reason. If the NIR optimization looks sound,
you can try dumping the shaders out of RADV (again, I have no idea how to do
that), diff them, and see if you can figure out why it's a problem.
For the moment, I'm going to move it over to RADV so that those people get
notified.</pre>
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