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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - MI Serialization - inconsistent implicit operand ordering assumptions"
href="https://llvm.org/bugs/show_bug.cgi?id=24724">24724</a>
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<th>Summary</th>
<td>MI Serialization - inconsistent implicit operand ordering assumptions
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hfinkel@anl.gov
</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>Created <span class=""><a href="attachment.cgi?id=14844" name="attach_14844" title="MIR">attachment 14844</a> <a href="attachment.cgi?id=14844&action=edit" title="MIR">[details]</a></span>
MIR
Running the attached IR through llc using:
$ llc -o test.s test.ll -stop-after=machine-combiner > test.orig.mir
produces the attached IR. However, trying to ingest that MIR using:
$ llc -o test.s test.orig.mir -start-after=machine-combiner
-stop-after=machine-cse
yields this error:
error: test.orig.mir:64:39: expected an implicit register operand 'implicit
%rm'
BLR8 implicit %lr8, implicit %rm, implicit %x3
^
Changing the line as serialized:
BLR8 implicit %lr8, implicit %rm, implicit %x3
to this:
BLR8 implicit %x3, implicit %lr8, implicit %rm
allows the ingest to succeed. If MIR parsing requires a specific order of
implicit operands, it should always output them that way. Better, it should not
have this ordering requirement.</pre>
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