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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Segfault in SelectionDAG::LegalizeTypes when compiling optimized IR."
href="https://bugs.llvm.org/show_bug.cgi?id=45049">45049</a>
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<th>Summary</th>
<td>Segfault in SelectionDAG::LegalizeTypes when compiling optimized IR.
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>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>rspringer@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23181" name="attach_23181" title="Stack dump for the failure.">attachment 23181</a> <a href="attachment.cgi?id=23181&action=edit" title="Stack dump for the failure.">[details]</a></span>
Stack dump for the failure.
Apologies that I don't have a smaller reproducer; I've tried for ~a day to
reduce it without success.
Steps to reproduce:
1. Build (a recent?) llvm
2: Run:
llc sample.unopt.ll
-- The program compiles successfully.
3. Next run:
llc sample.opt.ll
A segfault similar to that attached will be generated.
Regarding the IR: I added a lame main() to force llc/lli/etc. to accept the IR;
the crash still happens if compiling the IR as a library function.
Sorry I don't have more investigation results to report - I just didn't manage
to get too far yet (chasing down a lot of red herrings).
The offending IR will be attached immediately.</pre>
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