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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - GVNHoist pass uses a large amount of memory and appears to hang due to large increase in buildtime"
href="https://llvm.org/bugs/show_bug.cgi?id=28670">28670</a>
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<th>Summary</th>
<td>GVNHoist pass uses a large amount of memory and appears to hang due to large increase in buildtime
</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>All
</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>Scalar Optimizations
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>alina.sbirlea@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16795" name="attach_16795" title="Sample testcase">attachment 16795</a> <a href="attachment.cgi?id=16795&action=edit" title="Sample testcase">[details]</a></span>
Sample testcase
The recently added GVNHoist pass causes certain Halide tests to take forever
making Halide unusable.
More details on discussion: <a href="https://reviews.llvm.org/D22639">https://reviews.llvm.org/D22639</a>
Adding a sample testcase generated by Halide.
Test using "opt -gvn-hoist gvnhoist_small.bc".
An even larger testcase can be found here:
<a href="https://drive.google.com/open?id=0B01oOnN8VyO8MnpIdlpBcmRybmc">https://drive.google.com/open?id=0B01oOnN8VyO8MnpIdlpBcmRybmc</a></pre>
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