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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - CFL-AA is too conservative with inttoptr/ptrtoint instructions."
href="https://llvm.org/bugs/show_bug.cgi?id=22927">22927</a>
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<th>Summary</th>
<td>CFL-AA is too conservative with inttoptr/ptrtoint instructions.
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<th>Product</th>
<td>libraries
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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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>Global Analyses
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>george.burgess.iv@gmail.com
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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>
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<pre>CFLAA will answer more conservatively than it needs to given the following
code:
%A = ptrtoint %Ptr
%B = inttoptr %A
; A is otherwise unused (or used only in other inttoptr instructions)
At the moment, the sets attached to %Ptr and %B will be marked as with
AttrUnknown, but if we can prove that %A is used only in inttoptr instructions,
then we can avoid the "unknown" attribute and simply unify the sets for %A, %B,
etc.
Thanks to <a href="mailto:ol.sall@gmail.com">ol.sall@gmail.com</a> for bringing this up.</pre>
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