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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - GVN hoists over "synchronizing" call with `inaccessiblemem_only" attribute"
href="https://bugs.llvm.org/show_bug.cgi?id=46210">46210</a>
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<th>Summary</th>
<td>GVN hoists over "synchronizing" call with `inaccessiblemem_only" attribute
</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>
</tr>
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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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</tr>
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<th>Reporter</th>
<td>jdoerfert@anl.gov
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23582" name="attach_23582" title="positive and negative test case">attachment 23582</a> <a href="attachment.cgi?id=23582&action=edit" title="positive and negative test case">[details]</a></span>
positive and negative test case
The attached test mimics a "critical region" (see PR45854) with an update
inside.
In both cases the calls surrounding the load+store pair are annotated with
inaccessiblememonly. However, only in the case the call is marked `nosync` it
is sound for GVN to hoist the load out of the loop. Basically, the call might
be a barrier to prevent races, wait for a signal indicating the global was
initialized, ...</pre>
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</p>
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