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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Update live range properly after dummy instructions in DeadRemat being inserted"
href="https://llvm.org/bugs/show_bug.cgi?id=28464">28464</a>
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<th>Summary</th>
<td>Update live range properly after dummy instructions in DeadRemat being inserted
</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
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Register Allocator
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>wmi@google.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>Now we don't have proper live interval update after dummy instructions in
DeadRemat being inserted. It hasn't caused big trouble because
isTriviallyReMaterializable restricts the formats of rematerializable
instruction (D19486). If someday we relax the limitation in
isTriviallyReMaterializable and allow more complex instructions to be
rematerializable, the problem will surface.
File this bug as a reminder to find a proper fix to the live interval update
problem.</pre>
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