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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - __tls_get_addr gets called before saving return address"
href="https://llvm.org/bugs/show_bug.cgi?id=25839">25839</a>
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<tr>
<th>Summary</th>
<td>__tls_get_addr gets called before saving return address
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Backend: PowerPC
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>timshen91@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15457" name="attach_15457" title="Minimized test case">attachment 15457</a> <a href="attachment.cgi?id=15457&action=edit" title="Minimized test case">[details]</a></span>
Minimized test case
For a PIC TLS variable access in a function, prologue (mflr followed by std and
stdu) gets scheduled after a __tls_get_addr call. __tls_get_addr messed up LR
and no one saves/restores it.
Should the fix be simply adding PPC::ADJCALLSTACKDOWN and PPC::ADJCALLSTACKUP
around __tls_get_addr? What should the stack size be (say, 0)?
Attached minimized test case that fails on trunk.
Thanks!</pre>
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