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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Gibberish code generated at -O3"
href="https://bugs.llvm.org/show_bug.cgi?id=42553">42553</a>
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<th>Summary</th>
<td>Gibberish code generated at -O3
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>FreeBSD
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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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
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<th>Reporter</th>
<td>slw@zxy.spb.ru
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22216" name="attach_22216" title="t.clang.inc.c -- source code">attachment 22216</a> <a href="attachment.cgi?id=22216&action=edit" title="t.clang.inc.c -- source code">[details]</a></span>
t.clang.inc.c -- source code
Very simple code cause generate gibberish vectorized assembler at -O3 level.
I am found this in fio source.
t.clang.inc.c -- is exctracted function for demonstrated purpose, after
preprocessor run.
t.clang.O3.s generated assembler, -O3, gibberish
t.clang.O1.s generated assembler, -O1, more clean, compact and speed.</pre>
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