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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - x86 integrated assembler: replace .irp 'symbol' under .altmacro mode"
href="https://bugs.llvm.org/show_bug.cgi?id=38999">38999</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>x86 integrated assembler: replace .irp 'symbol' under .altmacro mode
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>5.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>FreeBSD
</td>
</tr>
<tr>
<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>emaste@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Blocks</th>
<td>33405
</td>
</tr></table>
<p>
<div>
<pre>Found while trying to build the FreeBSD base system entirely with the
integrated assembler.
One of .altmacro's effects is:
Expression results as strings
You can write `%expr' to evaluate the expression expr and use the result as
a string.
Consider the following snippet:
------------------------
.altmacro
.macro m dst,src
addq %\src,%\dst
.endm
.irp r,r15
m r,r8
.endr
------------------------
GNU as and gcc assemble this, while Clang (6.0) IAS produces:
<instantiation>:1:10: error: invalid register name
addq %r8,%r
^~
<instantiation>:1:1: note: while in macro instantiation
m r,r8
^
macro.s:7:1: note: while in macro instantiation
.irp r,r15
^</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [meta] Using the integrated assembler to build the FreeBSD base system (kernel + world)"
href="https://bugs.llvm.org/show_bug.cgi?id=33405">Bug 33405</a>] [meta] Using the integrated assembler to build the FreeBSD base system (kernel + world)
</li>
</ul>
</div>
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