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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - SLP vectorizer does not handle calls"
href="http://llvm.org/bugs/show_bug.cgi?id=17742">17742</a>
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<th>Summary</th>
<td>SLP vectorizer does not handle calls
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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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>Scalar Optimizations
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>hfinkel@anl.gov
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11452" name="attach_11452" title="IR file (derived from test/Transforms/SLPVectorizer/X86/simplebb.ll)">attachment 11452</a> <a href="attachment.cgi?id=11452&action=edit" title="IR file (derived from test/Transforms/SLPVectorizer/X86/simplebb.ll)">[details]</a></span>
IR file (derived from test/Transforms/SLPVectorizer/X86/simplebb.ll)
The SLP vectorizer currently does not handle calls. Some calls, and their
corresponding intrinsics, can be efficiently lowered (like calling fabs() or
floor(), etc.) into vector code. I've attached a test case that I believe
should vectorize with the SLP vectorizer, but does not because of this lack of
call handling.
The loop vectorizer handles these well. See getIntrinsicIDForCall in
lib/Transforms/Vectorize/LoopVectorize.cpp and its various uses for an example
of how to do this properly.</pre>
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