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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [NewPM] Quadratic IR size and compile time"
href="https://bugs.llvm.org/show_bug.cgi?id=45253">45253</a>
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<th>Summary</th>
<td>[NewPM] Quadratic IR size and compile time
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<th>Product</th>
<td>new-bugs
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dmajor@mozilla.com
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<th>CC</th>
<td>chandlerc@gmail.com, htmldeveloper@gmail.com, jmuizelaar@mozilla.com, llvm-bugs@lists.llvm.org
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<pre>We have a case where the new pass manager takes much longer to compile than the
legacy pass manager: <a href="https://godbolt.org/z/QHjbwq">https://godbolt.org/z/QHjbwq</a>
Under the new PM, b's copy constructor has tons of allocas that appear to grow
quadratically with the number of smartptr members in a.
Oddly enough we only see it on the x86_64-apple-darwin target.</pre>
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