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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - r600g R600_LLVM=1 bad rendering (light blue instead of grey)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=55256">55256</a>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>r600g R600_LLVM=1 bad rendering (light blue instead of grey)
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>edwin+mesa@etorok.net
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/DRI/R600
</td>
</tr>
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<th>Product</th>
<td>Mesa
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</tr></table>
<p>
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<pre>Created <span class=""><a href="attachment.cgi?id=67592" name="attach_67592" title="apitrace">attachment 67592</a> <a href="attachment.cgi?id=67592&action=edit" title="apitrace">[details]</a></span>
apitrace
Attached is an apitrace, and screenshots.
Bad behaviour with --enable-r600-llvm-compiler:
OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD RV730
OpenGL version string: 3.0 Mesa 9.1-devel (git-fb40f88)
OpenGL shading language version string: 1.30
If you look at the 'bad.png' screenshot you'll see that the 4th column is light
blue. It should be grey.
With R600_LLVM=0 the good behaviour is seen: good.png.
See the apitrace for the full shader, here is the relevant bit:
else if (gl_FragCoord.x < 640)
color = vec4(1.0f, 1.0f, 1.0f, 1.0f);//white
[...]
vec4 color0, color1, color2, color3;
if (gl_FragCoord.y < 200) {
color0 = color1 = color2 = color;//75%
[...]
} else if (xmod < 55 || xmod >= 105 ||
ymod < 75 || ymod >= 125) {
// real color
// TODO: buggy on r600g with LLVM?
gl_FragColor = (color0 + color1 + color2 + color3) / 4.0f;
P.S.: the shader is not optimal, most of the branches could be moved out of it,
I haven't tried to minimize the testcase though.</pre>
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