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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - No vectorization of constraint fptoui"
href="https://bugs.llvm.org/show_bug.cgi?id=47672">47672</a>
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<th>Summary</th>
<td>No vectorization of constraint fptoui
</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>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>opt
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>thomas.preudhomme@celest.fr
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24002" name="attach_24002" title="Testcase for vectorization of fptoui">attachment 24002</a> <a href="attachment.cgi?id=24002&action=edit" title="Testcase for vectorization of fptoui">[details]</a></span>
Testcase for vectorization of fptoui
Hi,
Vectorization of constrainted fptoui does not happen with this testcase even
though it would not generate more exceptions. The output when running opt -O2
-S -mtriple aarch64 -mattr=+neon testcase.ll | llc is as follows:
conv_v2f32_to_v2i32:
ldr d0, [x0]
fcvtzu v0.2s, v0.2s
str d0, [x1]
ret
strict_conv_v2f32_to_v2i32:
ldp s0, s1, [x0]
fcvtzu w8, s0
fcvtzu w9, s1
stp w8, w9, [x1]
ret
Why does the function strict_conv_v2f32_to_v2i32 not generate the same output
as conv_v2f32_to_v2i32?</pre>
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