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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Macro expansion fails with "expected absolute expression""
href="https://bugs.llvm.org/show_bug.cgi?id=41825">41825</a>
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<th>Summary</th>
<td>Macro expansion fails with "expected absolute expression"
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</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>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>MC
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>isanbard@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>This is seen when compiling Linux with the integrated assembler. It was first
seen in AArch64, but isn't specific to that platform.
$ cat bad.s
.macro jump_slot jumptable, index, label
.if (. - \jumptable) != 4 * (\index)
.error "Jump slot index mismatch"
.endif
b \label
.endm
.text
jumptable:
jump_slot jumptable, 0, realtime
$ clang -cc1as -triple aarch64-grtev4-linux-gnu -target-cpu generic
-target-feature +neon -mrelocation-model static -o /dev/null bad.s
<instantiation>:1:5: error: expected absolute expression
.if (. - jumptable) != 4 * (0)
^
bad.s:10:3: note: while in macro instantiation
jump_slot jumptable, 0, realtime
^
<instantiation>:2:1: error: Jump slot index mismatch
.error "Jump slot index mismatch"
^
bad.s:10:3: note: while in macro instantiation
jump_slot jumptable, 0, realtime
^</pre>
</div>
</p>
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