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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [RFE] add -fno-lifetime-dse option"
href="https://bugs.llvm.org/show_bug.cgi?id=40694">40694</a>
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<th>Summary</th>
<td>[RFE] add -fno-lifetime-dse option
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<th>Product</th>
<td>clang
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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>Linux
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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>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>stsp@list.ru
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>g++ has the -fno-lifetime-dse option to support the code that
expects the value in memory not affected by placement new, when
creating PODs. That is, you can initialize some array with the
needed values, and then use placement new to create POD objects
on that array, and they will be initialized from the pre-existing
values.
This is a useful extension and it would be nice if clang to
also support it.</pre>
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