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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - unused exception_ptr optimization"
href="https://bugs.llvm.org/show_bug.cgi?id=39986">39986</a>
</td>
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<tr>
<th>Summary</th>
<td>unused exception_ptr optimization
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<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>
<tr>
<th>Component</th>
<td>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>trass3r@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre><a href="https://godbolt.org/z/oQRbPa">https://godbolt.org/z/oQRbPa</a>
#include <exception>
#include <stdexcept>
void handle_eptr(std::exception_ptr eptr)
{
if (eptr)
std::rethrow_exception(eptr);
}
int main()
{
std::exception_ptr eptr;
handle_eptr(eptr);
}
$ clang++ -stdlib=libc++ -std=c++17 -O3 -fno-exceptions
I'm not sure if it's possible but the expectation is that it should generally
optimize all the code away, especially with -fno-exceptions.
It came up when testing coroutines with the cppcoro lib:
<a href="https://godbolt.org/z/u-vaoR">https://godbolt.org/z/u-vaoR</a></pre>
</div>
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