<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [X86] Invalid code generated for shufflevector + extractelement"
href="https://bugs.llvm.org/show_bug.cgi?id=43968">43968</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[X86] Invalid code generated for shufflevector + extractelement
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Keywords</th>
<td>miscompilation
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Backend: X86
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nunoplopes@sapo.pt
</td>
</tr>
<tr>
<th>CC</th>
<td>craig.topper@gmail.com, liuz@cs.utah.edu, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, regehr@cs.utah.edu, spatel+llvm@rotateright.com
</td>
</tr></table>
<p>
<div>
<pre>define float @foo(i32 %a, float %in) {
%1 = insertelement <4 x float> undef, float %in, i32 0
%t6.i = shufflevector <4 x float> %1, <4 x float> undef, <4 x i32> <i32
undef, i32 0, i32 0, i32 0>
%val = extractelement <4 x float> %t6.i, i32 1
ret float %val
}
llc gives:
foo: # @foo
ret
It should return %in.
<a href="https://godbolt.org/z/Ej_CKQ">https://godbolt.org/z/Ej_CKQ</a></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>