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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assembler does not understand symbol used as operand"
href="https://bugs.llvm.org/show_bug.cgi?id=38945">38945</a>
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<tr>
<th>Summary</th>
<td>Assembler does not understand symbol used as operand
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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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>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>joel@jms.id.au
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20880" name="attach_20880" title="example">attachment 20880</a> <a href="attachment.cgi?id=20880&action=edit" title="example">[details]</a></span>
example
When building the powerpc Linux kernel, clang trips up on
arch/powerpc/boot/crt0.S:
cmpdi r12,RELACOUNT@l
Enclosing the RELACOUNT with () allows it to work. binutils does not require
this, so clang will not work with a bunch of existing code. It would be nice if
clang supported the same syntax.
A simple example, built with clang trunk:
cat << EOF > t.S
NUMBER = 0x6ffffff9
.text
.globl main
main:
cmpwi 8,NUMBER@l
EOF
$ clang-8 -target powerpc64le-linux-gnu t.S
t.S:6:18: error: unexpected modifier on variable reference
cmpwi 8,NUMBER@l
^
t.S:6:10: error: unknown operand
cmpwi 8,NUMBER@l
^</pre>
</div>
</p>
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