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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - llc produces incorrect assembler for knl"
href="https://llvm.org/bugs/show_bug.cgi?id=25270">25270</a>
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<th>Summary</th>
<td>llc produces incorrect assembler for knl
</td>
</tr>
<tr>
<th>Product</th>
<td>tools
</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>llc
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>Vsevolod.Livinskij@frtk.ru
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</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=15130" name="attach_15130" title="Reproducer (foo.ll is miscompiled).">attachment 15130</a> <a href="attachment.cgi?id=15130&action=edit" title="Reproducer (foo.ll is miscompiled).">[details]</a></span>
Reproducer (foo.ll is miscompiled).
llc produces incorrect assembler for knl. It tries to reuse the %var in two
Print calls, despite its value has changed. llc probably optimized away the
register spill of %var_load_load by reloading it. This bug occurs in foo.ll
file.
Compile:
llc -mcpu=knl call.ll
llc -mcpu=knl foo.ll
clang++ -march=knl foo.s call.s main.cpp
Run: sde -knl -- ./a.out
LLVM revision #250620</pre>
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