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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Runtime crash with -O0"
href="https://llvm.org/bugs/show_bug.cgi?id=26540">26540</a>
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</tr>
<tr>
<th>Summary</th>
<td>Runtime crash with -O0
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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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>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Runtime Library
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ismail@i10z.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=15859" name="attach_15859" title="Testcase">attachment 15859</a> <a href="attachment.cgi?id=15859&action=edit" title="Testcase">[details]</a></span>
Testcase
The attached code when compiled with -O0 will fail at runtime:
clang++ -Wno-c++11-narrowing -fopenmp -O0 smallpt.cpp
./a.out 100
Rendering (100 spp) 20.47%[1] 23947 segmentation fault (core dumped)
./a.out 100
Admittedly the code is very ugly but libgomp seems to work so might be an
interesting testcase.</pre>
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