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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 'write' may be used uninitialized in fs_visitor::emit_repclear_shader"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85260">85260</a>
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<th>Summary</th>
<td>'write' may be used uninitialized in fs_visitor::emit_repclear_shader
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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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
</td>
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>jason@jlekstrand.net
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<th>Reporter</th>
<td>idr@freedesktop.org
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<th>CC</th>
<td>idr@freedesktop.org
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<p>
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<pre>GCC generates the following warning:
brw_fs.cpp: In member function 'void fs_visitor::emit_repclear_shader()':
brw_fs.cpp:2613:21: warning: 'write' may be used uninitialized in this function
[-Wmaybe-uninitialized]
In fact, if key->nr_color_regions is 0, this will occur. It is possible to
have a fragment shader that does not explicit write the framebuffer. For
example, it could just generate output via atomics. In the future, a fragment
shader could also just use image stores.
If the key->nr_color_regions == 0 case cannot occur, the code should document
the reason, and we should add an 'assume(key->nr_color_regions > 1)' before the
for-loop.</pre>
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