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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Faulty code generation for -O2 when using custom allocator with fancy pointer"
href="http://llvm.org/bugs/show_bug.cgi?id=20524">20524</a>
</td>
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<th>Summary</th>
<td>Faulty code generation for -O2 when using custom allocator with fancy pointer
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++1y
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tkoeppe@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=12853" name="attach_12853" title="Custom allocator/pointer example that doesn't compile correctly with -O2">attachment 12853</a> <a href="attachment.cgi?id=12853&action=edit" title="Custom allocator/pointer example that doesn't compile correctly with -O2">[details]</a></span>
Custom allocator/pointer example that doesn't compile correctly with -O2
I have no particular insight in what's going on here, other than that there's a
very similar problem in GCC. Please see the attached code: Compiled with -O1 it
works, but with -O2 it is broken (the map doesn't contain the right content,
and Valgrind shows memory errors).
The code instantiates an std::map with a simple, custom allocator that uses a
fancy pointer.</pre>
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</p>
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