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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - lld-link does not preserve @llvm.used symbols with -opt:ref"
href="https://bugs.llvm.org/show_bug.cgi?id=40733">40733</a>
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<th>Summary</th>
<td>lld-link does not preserve @llvm.used symbols with -opt:ref
</td>
</tr>
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<th>Product</th>
<td>lld
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>COFF
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>llvm@inglorion.net
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Discovered when building Chromium: crbug.com/930886
We use @llvm.used to list symbols that are required to be preserved. We
translate this to COFF object files by emitting /include directives for those
symbols. However, when using LTO, these directives are generated after
directives have already been processed and so have no effect. This can cause
such symbols to be discarded when linking with -opt:ref.</pre>
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