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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Allow vector value types to use signext/zeroext attributes"
href="https://llvm.org/bugs/show_bug.cgi?id=31600">31600</a>
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<th>Summary</th>
<td>Allow vector value types to use signext/zeroext attributes
</td>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</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>llvm-dev@redking.me.uk
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, spatel+llvm@rotateright.com
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>As discussed on [<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - [x86, SSE] unnecessary shifts for bitwise logic with comparison (pcmp)?"
href="show_bug.cgi?id=28486">Bug #28486</a>], we don't currently support signext/zeroext
attributes on vector value types:
define <4 x i32> @boolext(<4 x i1> signext %a) {
%ext = sext <4 x i1> %a to <4 x i32>
ret <4 x i32> %ext
}
Doing so could help in a number of cases, for instance when passing around
mask/boolean vector data.</pre>
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