<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 - Cannot emit physreg copy instruction: cannot copy ZMM4 to RDI"
href="https://bugs.llvm.org/show_bug.cgi?id=45906">45906</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Cannot emit physreg copy instruction: cannot copy ZMM4 to RDI
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>9.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</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>vtjnash@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>craig.topper@gmail.com, llvm-bugs@lists.llvm.org, llvm-dev@redking.me.uk, spatel+llvm@rotateright.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23480" name="attach_23480" title="input function">attachment 23480</a> <a href="attachment.cgi?id=23480&action=edit" title="input function">[details]</a></span>
input function
>From analysis of <a href="https://github.com/JuliaLang/julia/issues/35393">https://github.com/JuliaLang/julia/issues/35393</a>, caused by
some slightly confused combination of TargetMachine and optimization level
options.
We saw that the attached ll file generates the attached mir file, which fails
inside llvm::X86InstrInfo::copyPhysReg. Seems it should be dead code as I don't
see a use of the value, but due to incomplete coverage of register sizes it's
causing a crash on:
renamable $rdi = COPY killed renamable $zmm4</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>