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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 --- - [UBO] nested structures don't get appropriate padding"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83533">83533</a>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[UBO] nested structures don't get appropriate padding
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>idr@freedesktop.org
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>glsl-compiler
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=105808" name="attach_105808" title="Test case">attachment 105808</a> <a href="attachment.cgi?id=105808&action=edit" title="Test case">[details]</a></span>
Test case
Looking at the IR dump, the compiler frontend generates
(expression bvec2 ubo_load (constant uint (0)) (constant uint (8)))
to load s2.bv.x. However, the GL API (correctly) believes that s2.bv is at
offset 16. Deleting any field from S1 or S2 (or putting the contents of S2
directly in the UBO) masks the problem. It seems that some part of the
compiler stack is not putting padding after s1 to align bv to a vec4 boundary.</pre>
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