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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Loops with "# pragma clang loop interleave (enable)" specified are vectorized even if -fno-vectorize is specified"
href="https://bugs.llvm.org/show_bug.cgi?id=47034">47034</a>
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<th>Summary</th>
<td>Loops with "# pragma clang loop interleave (enable)" specified are vectorized even if -fno-vectorize is specified
</td>
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<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<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>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Loop Optimizer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>fj8765ah@aa.jp.fujitsu.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
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<pre>Loops with "# pragma clang loop interleave (enable)" specified are vectorized
even if -fno-vectorize is specified.
By the way, it is not interleaved. Is the movement as expected?
a.c
void foo(double * restrict a,
double * restrict b,
double * restrict c,
int n) {
#pragma clang loop interleave(enable)
for (int i=0;i<n;i++)
c[i] = a[i] + b[i];
return;
}
% clang -O1 -fno-vectorize a.c -Rpass=vectorize -S
a.c:7:3: remark: vectorized loop (vectorization width: 2, interleaved count: 1)
[-Rpass=loop-vectorize]
for (int i=0;i<n;i++)
^
%</pre>
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