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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - -Xclang -malign-double lowers alignment of long double to 8"
href="https://bugs.llvm.org/show_bug.cgi?id=45136">45136</a>
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<th>Summary</th>
<td>-Xclang -malign-double lowers alignment of long double to 8
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>9.0
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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>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>blaz.tomazic@gmail.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>Created <span class=""><a href="attachment.cgi?id=23214" name="attach_23214" title="Example">attachment 23214</a> <a href="attachment.cgi?id=23214&action=edit" title="Example">[details]</a></span>
Example
When compiling with `-Xclang -malign-double` the `alignof(long double)` returns
8, while without the flags it returns 16. Basically the alignment is lowered.
I am not sure if this is the intended behaviour, I guess that this flag should
only set alignment on `double` from 4 to 8 on 32-bit systems.
For comparison GCC returns 16 with or without the flag `-malign-double`.
Tested on Linux x86-64 and OSX x86-64 (clang also with `-m32`). I suppose that
for 64-bit builds it should do nothing but it still lowered the alignment.</pre>
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