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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - MS ABI: clang generates unnecessary vtordisp adjustment"
href="http://llvm.org/bugs/show_bug.cgi?id=20477">20477</a>
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<th>Summary</th>
<td>MS ABI: clang generates unnecessary vtordisp adjustment
</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
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>LLVM Codegen
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>david.majnemer@gmail.com
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>consider:
struct A {
virtual A *f() { return this; }
};
struct B {
B() {}
virtual B *f() { return this; }
};
B b;
While both compilers agree on what B has in it's vftable in the first entry,
the second entry is different for both compilers.
For this entry, CL has ?f@B@@UAEPAU1@XZ which performs only a return
adjustment.
However, clang-cl has does a 'vtordisp' adjustment *and* a return adjustment.</pre>
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