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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Bad machine code: Using an undefined physical register"
href="https://llvm.org/bugs/show_bug.cgi?id=31898">31898</a>
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<th>Summary</th>
<td>Bad machine code: Using an undefined physical register
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>All
</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>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: AVR
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>me@dylanmckay.io
</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>llc ~/projects/llvm-project/llvm/test/CodeGen/Generic/vector.ll -o -
*** Bad machine code: Using an undefined physical register ***
- function: test_f8
- basic block: BB#0 (0x7fd2298033d8)
- instruction: %R29R28<earlyclobber,def> = LDDWRdYQ
- operand 1: %R29R28
*** Bad machine code: Using an undefined physical register ***
- function: test_f8
- basic block: BB#0 (0x7fd2298033d8)
- instruction: %R29R28<def,tied1> = ADIWRdK
- operand 1: %R29R28<kill,tied0>
LLVM ERROR: Found 2 machine code errors.</pre>
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