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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - R600g+sb: optimizer apparently stuck in an endless loop"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103142">103142</a>
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<th>Summary</th>
<td>R600g+sb: optimizer apparently stuck in an endless loop
</td>
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<th>Product</th>
<td>Mesa
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<th>Version</th>
<td>git
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Gallium/r600
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>gw.fossdev@gmail.com
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<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=134738" name="attach_134738" title="TGSI, byte code and logging output">attachment 134738</a> <a href="attachment.cgi?id=134738&action=edit" title="TGSI, byte code and logging output">[details]</a></span>
TGSI, byte code and logging output
With sb enabled some shaders apparently trigger an endless loops in the sb
optimizer.
The attached TGSI and log of a shader triggering this behaviour comes from the
Unreal Editor version 4.17.1,
The log was created with
#define PSC_DEBUG 1
in src/gallium/drivers/r600/sb_sched.cpp
The problem is probably related to the "FIXME rework this loop" on line 1808 in
the same file, and I also have the impression that it has something to do with
MULADD when the sources are a mix of CONST and IMM.
I'd try to fix it myself, but right now I don't really have a clue how to
approach this bug.
best,
Gert</pre>
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