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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - hang in llvm::SelectionDAG::computeKnownBits"
href="https://bugs.llvm.org/show_bug.cgi?id=40676">40676</a>
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<th>Summary</th>
<td>hang in llvm::SelectionDAG::computeKnownBits
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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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>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Common Code Generator Code
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>andrew@ziglang.org
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21459" name="attach_21459" title="test.ll">attachment 21459</a> <a href="attachment.cgi?id=21459&action=edit" title="test.ll">[details]</a></span>
test.ll
This 27-line LLVM IR file causes a hang in LLVM 7.0.1 and LLVM 8.0.0rc2. It
would take me several hours and more hard drive space than I have to confirm
that it also causes a hang in trunk, but I strongly suspect that it remains an
active bug.
Repro: clang -c test.ll
Downstream issue report: <a href="https://github.com/ziglang/zig/issues/1932">https://github.com/ziglang/zig/issues/1932</a></pre>
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