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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Unreported changes from dead-GEP removal in ArgumentPromotion"
href="https://bugs.llvm.org/show_bug.cgi?id=47477">47477</a>
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<th>Summary</th>
<td>Unreported changes from dead-GEP removal in ArgumentPromotion
</td>
</tr>
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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>Windows NT
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Interprocedural Optimizations
</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>dmajor@mozilla.com
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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, sguelton@redhat.com
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23944" name="attach_23944" title="deadgep.ll">attachment 23944</a> <a href="attachment.cgi?id=23944&action=edit" title="deadgep.ll">[details]</a></span>
deadgep.ll
With expensive checks:
$ opt -argpromotion -S deadgep.ll
Pass modifies its input and doesn't report it: Promote 'by reference' arguments
to scalars
It comes from
<a href="https://github.com/llvm/llvm-project/blob/1e392fc44584a4909b4dced02b8386b48963002b/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp#L674-L676">https://github.com/llvm/llvm-project/blob/1e392fc44584a4909b4dced02b8386b48963002b/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp#L674-L676</a>.
As an aside, while tracking this down, I also noticed some suspicious
modifications in
<a href="https://github.com/llvm/llvm-project/blob/1e392fc44584a4909b4dced02b8386b48963002b/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp#L936-L947">https://github.com/llvm/llvm-project/blob/1e392fc44584a4909b4dced02b8386b48963002b/llvm/lib/Transforms/IPO/ArgumentPromotion.cpp#L936-L947</a>
but I wasn't able to cause a failure with that.</pre>
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