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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - SubRange join failure with odd SubRange segments"
href="https://bugs.llvm.org/show_bug.cgi?id=35374">35374</a>
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<th>Summary</th>
<td>SubRange join failure with odd SubRange segments
</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>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Register Allocator
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>david.stuttard@amd.com
</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=19453" name="attach_19453" title="llvm-ir based reproducer for the bug">attachment 19453</a> <a href="attachment.cgi?id=19453&action=edit" title="llvm-ir based reproducer for the bug">[details]</a></span>
llvm-ir based reproducer for the bug
Another SubRange join failure. Distinct from others already reported (as far as
I can tell).
See <a class="bz_bug_link
bz_status_NEW "
title="NEW - SubRange join failure"
href="show_bug.cgi?id=35373">bug 35373</a>, <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Couldn't join subrange unreachable for RegisterCoalescer remat"
href="show_bug.cgi?id=33524">bug 33524</a>, <a class="bz_bug_link
bz_status_NEW "
title="NEW - Couldn't join subrange unreachable hit"
href="show_bug.cgi?id=33152">bug 33152</a> and <a class="bz_bug_link
bz_status_NEW "
title="NEW - UNREACHABLE "Couldn't join subrange" in RegisterCoalescer (out-of-tree backend)"
href="show_bug.cgi?id=32773">bug 32773</a> for details of the others.
Attached is a reproducer - transforming this to .mir doesn't work as it no
longer provokes the problem so it's a .ll instead
Initial investigation seems to suggest this is probably due to SubRanges having
Segments of the form [1234r, 1234d:0) as in other cases (just in a different
place).</pre>
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