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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - MachOReader breaks strict-aliasing rules"
href="https://bugs.llvm.org/show_bug.cgi?id=42360">42360</a>
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<th>Summary</th>
<td>MachOReader breaks strict-aliasing rules
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<th>Product</th>
<td>tools
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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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
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<th>Component</th>
<td>llvm-objcopy/strip
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>nuta@seiya.me
</td>
</tr>
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<th>CC</th>
<td>alexander.v.shaposhnikov@gmail.com, jake.h.ehrlich@gmail.com, jh7370.2008@my.bristol.ac.uk, llvm-bugs@lists.llvm.org, rupprecht@google.com
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<p>
<div>
<pre>According to Denis Bakhvalov [1], gcc warns a string-aliasing violation in
MachOReader:
llvm/tools/llvm-objcopy/MachO/MachOReader.cpp:124:46: required from here
llvm/tools/llvm-objcopy/MachO/MachOReader.cpp:104:19: warning: dereferencing
type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
I managed to reproduce the problem but in my environment (gcc 7.4.0 and 5.5.0
on Linux) gcc doesn't print such a warning.
Could someone else try this?
[1]:
<a href="https://github.com/llvm-mirror/llvm/commit/d3ca385e82dede1994405586086a7938dad6d5b7#commitcomment-34037779">https://github.com/llvm-mirror/llvm/commit/d3ca385e82dede1994405586086a7938dad6d5b7#commitcomment-34037779</a></pre>
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