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<th>Priority</th>
<td>medium
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [NV96] Artifacts in output of fragment program containing not unrolled loops with conditional break"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78161">78161</a>
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
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<th>Summary</th>
<td>[NV96] Artifacts in output of fragment program containing not unrolled loops with conditional break
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>gzregozrw@wp.pl
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>git
</td>
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<th>Component</th>
<td>Drivers/DRI/nouveau
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<th>Product</th>
<td>Mesa
</td>
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<pre>Created <span class=""><a href="attachment.cgi?id=98301" name="attach_98301" title="apitrace of simple test program.">attachment 98301</a> <a href="attachment.cgi?id=98301&action=edit" title="apitrace of simple test program.">[details]</a></span>
apitrace of simple test program.
Problem appear in shaders containing loops with conditional break when loop is
not unrolled by nouveau. I checked emitted code with ST_DEBUG=tgsi
NV50_PROG_DEBUG=1.
Tested with Mesa 10.2.0-devel (git-475f5ff) from 2014-04-30.
This bug exists for more than year, I first saw it in 2013-02.
I think that artifacts appear in areas where is big difference in number of
iterations executed for pixel before breaking from loop.</pre>
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