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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SimplifyCFG?] Common code sinking: failure to merge stores to the same ptr"
href="https://bugs.llvm.org/show_bug.cgi?id=46847">46847</a>
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<th>Summary</th>
<td>[SimplifyCFG?] Common code sinking: failure to merge stores to the same ptr
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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
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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>Scalar Optimizations
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>lebedev.ri@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>void src(uint32_t& Storage) {
if(Storage == 1)
Storage |= INT_MIN;
++Storage;
}
void tgt(uint32_t& Storage) {
++Storage;
if(Storage == 2)
Storage |= INT_MIN;
}
^ these are identical <a href="https://alive2.llvm.org/ce/z/aJN6Sz">https://alive2.llvm.org/ce/z/aJN6Sz</a>
but in the first case we fail to flatten the cfg, and merge stores
<a href="https://godbolt.org/z/8Yq9TE">https://godbolt.org/z/8Yq9TE</a></pre>
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</p>
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