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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Large amount of time taken in ScalarEvolution"
href="https://bugs.llvm.org/show_bug.cgi?id=34023">34023</a>
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<th>Summary</th>
<td>Large amount of time taken in ScalarEvolution
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>5.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Backend: X86
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>alex@crichton.co
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Originally reported at <a href="https://github.com/rust-lang/rust/issues/43418">https://github.com/rust-lang/rust/issues/43418</a>, we got a
reduced test case in Rust and I used `bugpoint` to reduce that even further to
yield a wad of IR located at
<a href="https://gist.github.com/alexcrichton/22bc33959863bf43169fe2776c227db4">https://gist.github.com/alexcrichton/22bc33959863bf43169fe2776c227db4</a>
If that IR (relatively small) is compiled with:
llc -O1 -filetype=obj foo.ll -o foo.o
it takes ~30s locally on my machine (the timeout I passed to `bugpoint`). The
original test case (which I can also get the IR if if you'd like) took much
much longer, but presumably may have exited at some point!
Also not I'm not entirely ertain that this is in ScalarEvolution, so please
feel free to retitle the bug!</pre>
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