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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ARM: Bad machine code: Using an undefined physical register"
href="https://llvm.org/bugs/show_bug.cgi?id=27275">27275</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ARM: Bad machine code: Using an undefined physical register
</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>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: ARM
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hans@chromium.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16184" name="attach_16184" title="fairly reduced repro">attachment 16184</a> <a href="attachment.cgi?id=16184&action=edit" title="fairly reduced repro">[details]</a></span>
fairly reduced repro
$ clang --version
clang version 3.9.0 (trunk 265767) (llvm/trunk 265768)
$ clang -cc1 -triple thumbv7-apple-ios9.0.0 -emit-obj -Os -std=c++11 a.ii
*** Bad machine code: Using an undefined physical register ***
- function:
_ZN53SOCKSClientSocketPoolTest_AsyncSOCKSConnectError_Test6m_fn10Ev
- basic block: BB#8 if.end (0x5e24a98)
- instruction: t2STRi12
- operand 0: %R2<kill>
fatal error: error in backend: Found 1 machine code errors.</pre>
</div>
</p>
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