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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Suboptimal partial vectorization"
href="https://bugs.llvm.org/show_bug.cgi?id=47554">47554</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Suboptimal partial vectorization
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Loop Optimizer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.bolvansky@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>#define N 16
unsigned int out[N];
unsigned int in[N];
void
main1 (unsigned int x)
{
for (int i = 0; i < N; ++i)
out[i] = (in[i] + i) + x;
}
ICC:
Dispatch Width: 6
uOps Per Cycle: 5.87
IPC: 4.70
Block RThroughput: 5.0
Clang:
Dispatch Width: 6
uOps Per Cycle: 4.41
IPC: 3.06
Block RThroughput: 8.0
<a href="https://godbolt.org/z/vcEjEa">https://godbolt.org/z/vcEjEa</a></pre>
</div>
</p>
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