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<body><span class="vcard"><a class="email" href="mailto:sohachak@mpi-sws.org" title="soham <sohachak@mpi-sws.org>"> <span class="fn">soham</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Wrong transformation due to semantic gap between C11 and LLVM semantics"
href="http://llvm.org/bugs/show_bug.cgi?id=22514">bug 22514</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>RESOLVED
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<td>REOPENED
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<td style="text-align:right;">Resolution</td>
<td>INVALID
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<td>---
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Wrong transformation due to semantic gap between C11 and LLVM semantics"
href="http://llvm.org/bugs/show_bug.cgi?id=22514#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - Wrong transformation due to semantic gap between C11 and LLVM semantics"
href="http://llvm.org/bugs/show_bug.cgi?id=22514">bug 22514</a>
from <span class="vcard"><a class="email" href="mailto:sohachak@mpi-sws.org" title="soham <sohachak@mpi-sws.org>"> <span class="fn">soham</span></a>
</span></b>
<pre>In the source program
x = 1 => x.store(1,std::memory_order_seq_cst) and
x == 1 => x.load(std::memory_order_seq_cst) == 1
The R_sc(X,1) in readA() reads-from W_sc(X,1) in writeA() which results in
synchronization and W_na(a,42) happens-before R_na(a,42) and thus synchronized.
If (x==1) test fails then W(x) and R(x) is not synchronized and in that case
R_na(a) does not take place.
Thus the source program is race free.</pre>
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