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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Assertion failure in greedy register allocator: LiveRangeEdit.cpp:248:"
href="https://llvm.org/bugs/show_bug.cgi?id=31015">31015</a>
</td>
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<tr>
<th>Summary</th>
<td>Assertion failure in greedy register allocator: LiveRangeEdit.cpp:248:
</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>
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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>
<tr>
<th>Component</th>
<td>Register Allocator
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tstellar@gmail.com
</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=17588" name="attach_17588" title="Reduced Tetst Case">attachment 17588</a> <a href="attachment.cgi?id=17588&action=edit" title="Reduced Tetst Case">[details]</a></span>
Reduced Tetst Case
LiveRangeEdit.cpp:248: void
llvm::LiveRangeEdit::eliminateDeadDef(llvm::MachineInstr*,
llvm::LiveRangeEdit::ToShrinkSet&, llvm::AliasAnalysis*): Assertion
`MI->allDefsAreDead() && "Def isn't really dead"' failed.
This was observed with r286832 and the attached test case. To reproduce:
./llc -O3 -mtriple=amdgcn--amdhsa-opencl -mcpu=fiji -o - reg-alloc-crash.ll</pre>
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