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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - std::alignment_of<T>::value might be different from alignof(T)"
href="https://bugs.llvm.org/show_bug.cgi?id=39713">39713</a>
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<th>Summary</th>
<td>std::alignment_of<T>::value might be different from alignof(T)
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<th>Product</th>
<td>libc++
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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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
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>sbenza@google.com
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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
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<pre>Simple repro:
#include <type_traits>
static_assert(alignof(long long) == std::alignment_of<long long>::value);
With compiler flags: -std=c++17 -m32 -stdlib=libc++
alignof(long long) == 4
std::alignment_of<long long>::value == 8
The problem is that std::alignment_of is using __alignof__ which gives a
different result than alignof in this particular case.</pre>
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