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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - redundant clrlwi on powerpc64"
href="http://llvm.org/bugs/show_bug.cgi?id=22120">22120</a>
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<th>Summary</th>
<td>redundant clrlwi on powerpc64
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<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>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>skvadrik@gmail.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=13648" name="attach_13648" title="1.c and 2.c">attachment 13648</a> <a href="attachment.cgi?id=13648&action=edit" title="1.c and 2.c">[details]</a></span>
1.c and 2.c
See files 1.cpp and 2.cpp in attach.
compile: (clang version 3.6.0)
$ clang++ -target powerpc64-unknown-linux-gnu -g -O2 -c 1.c
$ clang++ -target powerpc64-unknown-linux-gnu -g -O2 -c 2.c
disassemble: (GNU objdump (GNU Binutils) 2.24)
$ powerpc64-unknown-linux-gnu-objdump -d 1.o > 1.s
$ powerpc64-unknown-linux-gnu-objdump -d 2.o > 2.s
compare 1.s and 2.s and you'll find redundant instruction
clrlwi r6,r6,24
in 2.s.
Both files are cut down from real-life programs.</pre>
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