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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Implement the -Winvalid-memory-model"
href="https://bugs.llvm.org/show_bug.cgi?id=49604">49604</a>
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<th>Summary</th>
<td>Implement the -Winvalid-memory-model
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>antoshkka@gmail.com
</td>
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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>
<div>
<pre>C/C++ memory model is hard and people do a lot of errors with it. A warning
from compiler could be very useful for cases when particular memory order
should not be used with particular atomic operation. Foe example
* store operations and memory_order_acquire or memory_order_acq_rel
* load operations and memory_order_release or memory_order_acq_rel
* CAS and memory_order_release or memory_order_acq_rel
Some compilers already implement such warning with -Winvalid-memory-model flag.
Godbolt Playground: <a href="https://godbolt.org/z/79bf19">https://godbolt.org/z/79bf19</a>
GCC related tikets: <a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69104">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69104</a> and
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99612">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99612</a></pre>
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