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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - Create subregister liveness tracking tests later"
href="http://llvm.org/bugs/show_bug.cgi?id=22007">22007</a>
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<th>Summary</th>
<td>Create subregister liveness tracking tests later
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>ASSIGNED
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Register Allocator
</td>
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<th>Assignee</th>
<td>matze@braunis.de
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<th>Reporter</th>
<td>matze@braunis.de
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>Subregister liveness tracking is currently disabled in trunk while it is
developed. That means we cannot sensibly commit testcases for bugs we fix there
right now. This PR serves as a reminder to create test cases once we enable
subregister liveness for some targets.
- Kill flags are invalid for partially undefined uses. Fixed in r224664
- RegisterCoalescer failed to properly detect undef copies if only the
respective subranges were dead at the copy (but the main range alive). Fixed in
r224560
- LiveIntervalAnalysis::computeDeadValues() did not actually attach dead flags
to many values anymore. Fixed in r224538
- RegisterCoalescer::stripCopies() didn't pickup copies if they involved
subranges through multiple stages of indirection. Fixed in r224461</pre>
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