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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Missed CSE opportunity"
href="http://llvm.org/bugs/show_bug.cgi?id=20242">20242</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Missed CSE opportunity
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>benny.kra@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>For this testcase
char *encode(char *p, unsigned v) {
if (v < 23) {
*(p++) = v | 128;
} else if (v < 42) {
*(p++) = v | 128;
*(p++) = v;
} else {
*(p++) = v | 128;
*(p++) = v >> 7;
}
return p;
}
The first line is the same in all 3 cases. We only merge the lower 2 cases at
clang -O3, leaving duplicated code around in the first and second case.</pre>
</div>
</p>
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