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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Missed optimization due to instcombine + sroa creating inttoptr on 32bit platforms"
href="http://llvm.org/bugs/show_bug.cgi?id=22786">22786</a>
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<th>Summary</th>
<td>Missed optimization due to instcombine + sroa creating inttoptr on 32bit platforms
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</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>
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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>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>bsteinbr@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13984" name="attach_13984" title="Testcase">attachment 13984</a> <a href="attachment.cgi?id=13984&action=edit" title="Testcase">[details]</a></span>
Testcase
InstCombine turns memcpys of 8 bytes into a load/store which SROA might later
split up into smaller values. In the attached test case, this ends up
extracting a pointer to doing a trunc + inttoptr operation, which stops the
second conditional branch from being eliminated, although it's clear that the
branch to "panic" will never be taken.</pre>
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