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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - error: invalid instruction mnemonic 'movsl'"
href="https://llvm.org/bugs/show_bug.cgi?id=30931">30931</a>
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<tr>
<th>Summary</th>
<td>error: invalid instruction mnemonic 'movsl'
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>amine.khaldi@reactos.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This was revealed by
<a href="https://github.com/reactos/reactos/blob/master/reactos/ntoskrnl/include/internal/i386/ke.h#L738">https://github.com/reactos/reactos/blob/master/reactos/ntoskrnl/include/internal/i386/ke.h#L738</a>
and then reduced to:
void foo(void)
{
__asm rep movsd;
}
cl /c compiles it without errors, but clang-cl /c emits:
error: invalid instruction mnemonic 'movsl'
__asm rep movsd;
^
<inline asm>(2,6): note: instantiated into assembly here
rep movsd
^~~~~
1 error generated.</pre>
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