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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Provide easy to inspect vectorization information"
href="http://llvm.org/bugs/show_bug.cgi?id=19353">19353</a>
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<th>Summary</th>
<td>Provide easy to inspect vectorization information
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>LLVM Codegen
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>gonzalobg88@gmail.com
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>GCC provides -ftree-vectorizer-verbose=x to inspect what the vectorizer is
doing. This allows you to see e.g. why the vectorizer is not vectorizing a
construct in which you expected vectorization (and to fix it).
AFAIK there is no easy way to obtain this information easily with clang. This
is thus a feature request.
A problem that AFAIK this option has in GCC is that it spits out _a lot_ of
information if you use it for your whole program. It would therefore make sense
to be able to delimit this information to code snippets using a pragma (e.g.
similar to those for pushing/popping warnings).</pre>
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