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<body><span class="vcard"><a class="email" href="mailto:t.p.northover@gmail.com" title="Tim Northover <t.p.northover@gmail.com>"> <span class="fn">Tim Northover</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Incorrect barriers for atomic intrinsics on ARM64"
href="https://bugs.llvm.org/show_bug.cgi?id=29102">bug 29102</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Incorrect barriers for atomic intrinsics on ARM64"
href="https://bugs.llvm.org/show_bug.cgi?id=29102#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Incorrect barriers for atomic intrinsics on ARM64"
href="https://bugs.llvm.org/show_bug.cgi?id=29102">bug 29102</a>
from <span class="vcard"><a class="email" href="mailto:t.p.northover@gmail.com" title="Tim Northover <t.p.northover@gmail.com>"> <span class="fn">Tim Northover</span></a>
</span></b>
<pre>I've now had some fairly detailed discussions with people at ARM and the
consensus is that this "full barrier" constraint is only in the Linux Kernel,
not in C++ (which is the memory model LLVM uses).
So I'm going to close this as invalid for now.
Feel free to reopen if a C++ example turns up where we do the wrong thing, and
reopen/retitle or refile to cover a super_seq_cst (name t.b.d.) ordering.
Obviously it would need someone willing and able to drive the work though.</pre>
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