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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - optimization missed NRVO"
href="https://bugs.llvm.org/show_bug.cgi?id=43846">43846</a>
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<th>Summary</th>
<td>optimization missed NRVO
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>9.0
</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>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++14
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>boris.oncev@gmail.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>mixing templated member function with auto return type misses NRVO
optimization,
while the same code without auto return type does not,
or the same code without the template also optimizes.
code on godbolt:
<a href="https://godbolt.org/z/Vzef_3">https://godbolt.org/z/Vzef_3</a>
does the right thing in 3.4.1
and breaks from 3.5 up to 9.0 and trunk</pre>
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