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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ExecutionEngine/Orc: pessimization warnings"
href="https://bugs.llvm.org/show_bug.cgi?id=44727">44727</a>
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</tr>
<tr>
<th>Summary</th>
<td>ExecutionEngine/Orc: pessimization warnings
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>10.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Core LLVM classes
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ggreif@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Using
-- The C compiler identification is GNU 9.2.0
-- The CXX compiler identification is GNU 9.2.0
I see many (20+) warnings like this:
```
/build/llvm/lib/ExecutionEngine/Orc/OrcCBindingsStack.h:345:72: required from
here
/build/llvm/include/llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h:408:33:
warning: moving a local object in a return statement prevents copy elision
[-Wpessimizing-move]
408 | return std::move(Err);
| ^
```
The fix should be easy. If `clang` doesn't like this, then either GCC or Clang
have a bug.</pre>
</div>
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