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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - IRPGO crashes calling getBBInfo on BB not in BBInfos"
href="https://llvm.org/bugs/show_bug.cgi?id=27299">27299</a>
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<th>Summary</th>
<td>IRPGO crashes calling getBBInfo on BB not in BBInfos
</td>
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<th>Product</th>
<td>libraries
</td>
</tr>
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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
</td>
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<th>Component</th>
<td>Miscellaneous Instrumentation passes
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>jvanadrighem@gmail.com
</td>
</tr>
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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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</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16193" name="attach_16193" title="Minimal reproducer. Requires attached profdata.">attachment 16193</a> <a href="attachment.cgi?id=16193&action=edit" title="Minimal reproducer. Requires attached profdata.">[details]</a></span>
Minimal reproducer. Requires attached profdata.
When applying prof data to a function with 2 Basic Blocks where the 2nd is
unreachable, the IRPGO pass crashes. I believe this is due to the unreachable
block not being entered into BBInfos in CFGMST and then later having getBBInfo
called on it. I will attach a patch which applies one of a couple solutions.
The attached profdata has a few counts for the entry block.
Minimal repro shown below and attached:
declare void @foo(%footype*) unnamed_addr #1 align 2
define void @mainfunc(%footype* %this) unnamed_addr #1 align 2 {
entry:
unreachable
foo.exit: ; No predecessors!
ret void
}</pre>
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