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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [PM] the new PM needs to learn about inter-analysis dependencies"
href="https://llvm.org/bugs/show_bug.cgi?id=28622">28622</a>
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<th>Summary</th>
<td>[PM] the new PM needs to learn about inter-analysis dependencies
</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>Linux
</td>
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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
</td>
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<th>Component</th>
<td>Core LLVM classes
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>chisophugis@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Blocks</th>
<td>28315
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>The issue is discussed in the thread '[PM] I think that the new PM needs to
learn about inter-analysis dependencies...'.
The basic gist is that if an analysis result FooResult holds a pointer to an
analysis result BarResult, then if a pass says it preserves FooAnalysis (but
not BarAnalysis) we need to nonetheless invalidate FooResult.
In the current new PM, if you say that you preserve FooAnalysis (but not
BarAnalysis) it will invalidate BarResult but not FooResult. Thus FooResult
will be stuck holding a dangling pointer and chaos will ensue.</pre>
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